VERSION DU LOGICIEL PHOTO CARTOON

Créez des effets photo HD illimités avec notre puissant logiciel PC Windows

Where is the blind spot detection sensor located. there is Lane Change Assist, and Blind Spot Detection.

3cx stun server. 937 StunClient::onTestTout [CM506004]: STUN request to STUN server 75. Open-standards. The 3CX STUN server tests fine with WinStun but still does not resolve. A STUN client (typically I understand having to have a different SIP port for each phone, and different STUN ports for each, and provisioning settings in the 3cx console and increment both the SIP port as well as the RTP ports, as outlined below something like: Phone 1: SIP-5067 RTP 14000-14009 Phone 2: SIP-5069 RTP 14010-14019 Phone 3: SIP-5071 RTP 14020-14029 So Hi Everyboy, We are getting STUN request server timed out. If you do not have access to the firewall, etc, SBC is the only solution (may require multiple SBC servers) Greetings! We testing out the 3CS phone system and have installed in a remote server. Hope this helps with the accurate situation for you. 101:3478 has timed out; used Transport: 0. png Now you will need to select which 3CX you have decided to go for. For free support, try first with 3CX StartUP or a 3CX hosted install using a supported SIP Trunk provider. 1 running fine in my office with an IP of x. Also, if the Cisco 7821 does have a web interface, I will try to set it up with the SIP Server, auth ID, and auth password. Denne informasjonen benyttes til å sette opp UDP-kommunikasjon mellom klienten og VOIP-tilbyderen og etablere en samtale. Hi Ricambi America. I'm using mainly Yealink devices without auto provisioning. It’s a complete business communication system you can install in minutes, whether on-premise on Windows or Linux, hosted, or in your own private cloud. It is not conceivable to review all the customers having DECT R510 reason why the update does not allow it any more! Not open for further replies. 222, 94. Copy STUN server link in 3CX FXS/DECT page for W60B. stun-us. #2. I would just go with VPN. I am running two separare 3cx server systems, one on my pc physically connected to my router, the other on my laptop connecting to my router via wireless. I believe 3 weeks ago phones stopped working. com Port 3478 Default second STUN server address stun2. I was a bit surprised that for my part of the US, running nslookup on 3CX Stun servers gave me Montreal and France. "3CX PBX doesn't have STUN server. g. 0 (Build 461) Server OS: Debian 10 (AWS EC2) Hosted in [AWS/Google/Azure/by 3CX] IP Phone Make/Model/Firmware version: Fanvil X3S version: 2. 212. If it is a problem with the particular server you are now using, you should see the problem disappear immediately. When I run firewall check it get successful most of the time but still activity logs I always get STUN request to STUN server has timed out. From local port 5060 UDP. I am making changes to the BLF's in 3CX, saving and hitting reprovision and all that appears to happen is the handset reboots! I have to do a factory reset on the handset in order to get it to make any changes I've saved in 3cx. 13 built by root @ rpmbuild64-2. Now I've been trying to set up a Yealink T42G, using Direct SIP (STUN - remote), trying to connect it to a 3CX server that is hosted in a data center on a virtual machine. I have Linksys WRT54G router and Linksys SPA3102 for connecting my VOIP phone and PSTN phone to 3CX. How to set the STUN server manually. xx of PBX". 144:3478 to xx. 3CX is a SIP proxy server that works with popular IP phones, gateways and SIP trunk providers. IP Phones behind a firewall) to set up In this post we show you how to enable STUN in order to test 3CX Phone System using a dynamic public IP address. The #1 HOSTED PBX SOLUTION. Fanvil I've heard a 3CX engineer point blank say that STUN is not a reliable or preferred method to provision any hardware. STUN Configuration V16 (previous version) 3CX. 252. For free support, try first with 3CX Small Business FREE or SMB. 25. YOUR CHOICE OF 3CX. But installing it in the phone does not solve the problem. STUN serveren hjælper klienterne med at finde frem til informationer Hi, my 3cx ver. Under Proxy and Registration I have provided the FQDN of my PBX as the Proxy. 125 specifying that the request was received from IP 212. My ip address has not (yet) changed, so luckily everything is still going well. us) In the first case - the phones do not work on STUN, in the second everything works. New installation of v16 on an Intel NUC using the Debian ISO. com] In this case the message is correct. 13:55:04. Do you use a VoIP provider or just a gateway? Do you have remote extensions? Run the 3CX firewall checker, see what results you get. Go to the “User” for which you want to add the phone. (red) But the 3cx server works fine. Reinstall TCP/IP: Start => configuration screen => network connections => Right click your LAN device, choose properties. I have a client with an on premise 3CX server ( Pro version 16SC). The example in the screenshot shows that the PBX sends 3 requests without getting a response. As soon, as I have deactivated the option to all extensions, the quality for internal calls have Network config, SIP ALG, DNS filtering, firewall, etc. 69. 113. Adds Hot Desking, FXS, Bridges and Teams support. " Step 1: Configure Port Forwarding (NAT) Login to the pfSense web management console and: Navigate to “Firewall” > “NAT”. VPN if possible, Any decent hosting provider will offer hosted instances with a software firewall for VPN termination. com, when connected directly to my provider. 1K views. 3. Create NAT rules for all required ports that need to be forwarded, based on this list. com & stun3. With 3CX V18 Update 6, you have the option of using a phone with a built in SBC. 3CX behaves like a stun server too. Most of us are on fanvil but another client has 5 yealinks , since Monday they are often getting no audio on one end of the call, and also the phone doesnt ring frequently. palosanto. I have been trying to implement the stun server on both the server and the external client (PAP2) both are using stun. STUN protokollet definieras i RFC 3489. Az RFC szerint ez a port és az IP tetszőlegesek. When I run nslooup stun3. 0:5060/UDP fk=0 tgt= Inbound calls work fine A STUN protokollt az RFC 3489 szabvány határozza meg. This is a successful test as both scenarios succeeded but this is not the case for port 5060. 2:3478 has timed out; used Transport: 209. --- stun. 199@ [Dev:sip: 199@<remote office public ip>:5063 ;line=b0e481044ef2646] @YiannisH_3CX, Just to confirm what @hroberts65616 is reporting, I commented on this issue back in March of this year. Over the last 2 weeks, I am having a strange issues, STUN provisioned phones will all fail to register at the same time once a week. I've followed the proper procedure, as outlined on the 3CX website, including resetting the Hi We have migrated to VoIP and 3cx and had a very bad voice quality first. 222. Dutch is my native language, not English. The message the PA3 has in the webui is that it's waiting on the stun server, then eventually it times out. Now log into the 3CX Management Console and go to the Phones page (so we can do the 2nd on-prem phone) GiannosC_3CX. I haven't seen other ports mentioned before in the server, log when doing a STUN test, it all happens over one port. V20: 3CX Re-engineered. . TCP: 5015: will make a series of requests to a STUN Server (typically a service on a network host in the public Internet, dedicated only to responding to STUN requests). If I set my IP to static and run a firewall check everything works including DNS Resolution for the stun servers. 0 Server Installation Location: Google VM Number of Extensions: 20 Extension configured through STUN Firewall: Sonicwall TZ300 Initially, when I tried, I am Secondly, do people generaly use their providers (e. If the PBX gets the Answer from this second IP / Port then the PBX knows it has a working full cone nat. com and on the hardware phone I have set the stun server to stun. com:3478 could not be reached (host name is not resolved). Next, I will introduce how to set up STUN server for Fanvil, yealink and snom phones. Alejandro_3CX. 1 Prerequisites You can use the default 3CX STUN server or any other STUN server, they should all come back with the same results. ; Select the interval for the heartbeat checks to be made, (default 30 seconds) and configure whether failover occurs if one or all tests fail. 655, one is on a Windows 10 platform & the other on a RPi4 The request was sent to 151. I also put STUN server stun. Please also note, that 3CX will use several "STUN" Servers to test up against, and the reply IP will differ from each of the "STUN" Servers that reply. 061 [MS201000] Use STUN server 'stun2. the hardware config is P3, 256mb Ram, 40Gb HDD. com' done resolving 'stun3. We have several clients with different remote phones. The STUN Protocol. When I place a call to the Intercom, 3CX generates this log message: 10:35:43. voipbuster. In scenarios of decentralized IP phones, STUN is recommended, whereas in scenarios with several IP Phones in a single office (site) it is a good practice to use the SBC, as the gain in management and security is great. We deploy your instance to cloud provider DigitalOcean and automatically configure firewall rules. GitHub Gist: instantly share code, notes, and snippets. Any help would be apprecioated. Ci Hello, Is there an updated list of 3CX STUN server IP addresses that the firewall checker uses? We would like to avoid exposing SIP to the world and instead Jun 28, 2007. Hosted - PRO/ENT. ☛ Read the guide to set it up easily! As shown below, IPv4 remains on detection. Oct 4, 2020. Hi Alan, The direct implications are that it may stop working when you least expect it because the decision-making was left up to the automated algorithms of your router/firewall rather than being put hard in place. Jun 22, 2017. xxx. If i check "PCX transmits Audio", the audio is working, but as far is I know, checking this checkbox is not required and degrades quality. And those extensions need to blind to Media server as well. com works and I've verified with 3G, but the problem I have now is that all my Jan 8, 2019. Thread starter It could be a STUN server that is down. The STUN servers in a default fresh install are stun-eu. 209:5060 for local address ":9048" [MS101003] I've installed 3cx successfully on a pc running on Windows XP. Each stun server must have two ip's so in our case our. 927 CallMgr::failResolveExtIp Failed to resolve external IP! 13:55:04. com to stun2. How to configure Yealink T4 Series. 3cx. com Normally, I leave the stun setting to the default: stun. SipGate) STUN server or the 3CX STUN server? TIA Nigel Ainscoe . 76. Apr 6, 2021. 21 But if I ping that address, I get no response. I recently changed the STUN servers to 1) stun. 131. com with IP 198. My ios app is having problems connecting. STUN Server for Elastix v2. This test will also perform a DNS resolution check if the STUN server’s hostname is specified. stun. Select when to make a failover and which services you want to monitor: SIP Server, Web Server or Tunnel Server. No reason too only use stun. May 24, 2019. Easy to install, but it wants to also run a mini SIP server on port 5060 so you need to change its SIP server port to avoid a conflict with 3CX. Joined Sep 18, 2007 Messages 110 Reaction score 0. I assume 3CX is set to use port 5060 2. Please help! It is urgent. com. This test checks basic connectivity to the internet and that the STUN server is reachable. no, the second one you will not see in DNS lookups, PBX sends a request to know IP, from an unknown IP an answer is sent (this IP sits on the same server). should i make this port forwarding too on Oct 29, 2018. Once saved, navigate to Network Settings, and set NAT Traversal to “STUN”. Hosted - FREE/SMB. A SBC or local LAN only is supported. System has been working great over the last several years. 160. 32. 96. KenC. Give each phone a fixed ip address (can be via dhcp reservation) 2. Looking at the config via the management console or accessing the web interface of the phone would confirm that. 10026. bensound. yourdomain. com and stun2. 927 StunClient: rocess STUN failed to resolve external IP using server 194. So nothing wrong with my configuration or firewall The local 3CX server with IP address 192. The 3CX PBX is acting as STUN server for external extensions. In this article, we will look into details of the STUN protocol itself. 722 was not used by the phones. 135. petewatterschats said: Steps for W60B Connection to 3CX STUN. 249. Declaring that the STUN server should NOT change its IP or the Port in order to reply to this request. I read various reviews and various opinions on using STUN, with vendors, like Telin, pushing for VPN. 5,895. In SIP Server field, enter the public IP/FQDN of 3CX Phone System (“testgs. 219:3479 [Test2] One on One Port Forwarding FAILED. Hello! I have recently setup a 3cx instance with a dynamic public IP address and 3cx provided fqdn. 192. 65) sends a response back to Computer A through the gateway with public IP 212. Each call requires 2 RTP ports, one to control the call and one for the call 4. Figure 8: Configure Remote extension via STUN 6. Follow the steps in this guide to manually configure your Yealink T41P, T42G, T46G, T48G phones with 3CX ®. org where they list some public stun servers. ☛ Visit us and learn how to do it! Hi all, I am testing 3cx with LinkSys SPA942 IP telephones and I had a problem with connecting to other IP telephones within the same network. HTH. Phone System / PBX. The fqdn still points to the old ip address. com 2. 8. Go to Line – Basic Settings-STUN Settings, then enter the 3CX server address Hi, Yes, 3CX provide STUN Server feature on default port 5060. rfc에는 포트 및 ip가 임의적이라고 명시되어 있습니다. The only issue is other phones in the office can't use that router phone as their SBC, because it might Under General Settings | STUN, the instructions say "TO DISABLE STUN RESOLUTION, DELETE STUN ENTRIES", which is what is recommended when 3CX is on a public IP addrss. Hosted (Cloud - Dedicated) Self-managed (Private cloud - On-premise) BUILT FOR REMOTE WORKING 3cx Stun Server down or something wrong on my side ? Thread starter silentfun; All internal IPs and ports are allowed OUT through the firewall. Additionally, the server was constantly popping up errors stating that the STUN server could not be reached. #7. But in the external connections where you get the registration you get no audio. Hosted (Cloud - Dedicated) Self-managed (Private cloud - On-premise) BUILT FOR REMOTE WORKING. %2 could not be reached%3\r\nIt could be that the STUN server you are using is down or a network problem is preventing STUN resolutions. The Debian is a totally fresh install. We have always used 3CXSBC when provisioning more than 4/5 remote phones to a 3CX instance. Unable to contact STUN. Sep 5, 2018. Forums. počítačům za firewall) nastavit telefonní hovory na poskytovatele VOIP, který je mimo From the above we can see that twice NAT configuration is being used because the VoIP phone’s IP address is 192. This can happen on calls between extensions, at the remote end, or from a n extension at the server end to the remote extension. 242 as the primary WAN IP Address then make the . Take calls from your browser; Un server STUN (Transversala Simplă a Protocolului Datagramei Utilizatorului [UDP] Prin Traducătorii Adresei Reţelei [NATs]) permite clienţilor NAT (de exemplu, computerele Default STUN server address stun. using stun you have to. 585 StunClient::loadStunList [CM306002]: There is no valid STUN server This module covers Remote STUN IP Phone configuration; the prerequisites, supported devices, firewall requirements and more. It could be that the STUN server you are using is down or a network problem is preventing STUN resolutions. You will have to get the server settings from your 3CX management console for the extension you want to set up. El servidor STUN permite a los clientes encontrar sus direcciones Self-hosted or on-premise installs are more complex to install and troubleshoot. com on the host machine it resolves properly. If we don\'t find any major issues Jan 9, 2023. Log has (on each service restart): "Your public IP has changed and 3CX updated your FQDN records from X. one more question - i tried stun-win32 and tested it with winstun client. I am hoping to target Provisioning a SIP Phone on STUN3CX Firmwares - https://www. Free User Joined Nov 8, 2018 Messages 22 Reaction score 1. The STUN server tar ball also include a client API to enable STUN functionality in SIP endpoints. Are all RTP ports forwarded if behind NAT? Is QoS configured properly? Also, more information like the PBX version would help. 195. I have 3 different customers that STUN phones set up. STUN is a client-server protocol. To show support for those with food allergies/intolerances www. 57:5060 We will appreicate any input. Please let me know if you need any further information in order to provide a As an Intermediate Certified, you should know that STUN phones uses the port 5060. Working Stun Now visit the webclient admin page and add the router phone first from there. If you are using Firmware x. Not open for further replies. I always use local IP addresses with my VoIP provider. We can call a few times in a row and at least one time it will not ring at all. I tested this out on my 3CXPhone connected to my VoIP provider directly. Everything works fine except the CyberData equipment. 222:3478 could not be reached (time out three times) every 20 minutes. Categories. Jan 7, 2017. two stun servers have a total of four ips. There are some warnings in the Server Event Log last night: Code: STUN server stun. Well they need, but 3CX "acts" as a stun for them too. 7, 198. But it's overkill, 3CX'$ default security settings are pretty secure, coupled with the IP blacklist. Do you even need STUN on 3CX, maybe not. The clients don't need a stun. Er besitzt zwei IP-Adressen und weist Clients an, auch Verbindungstests über eine andere IP-Adresse und Port-Nummer durchzuführen. I'm using 3cx free edition to test out 13:52:30. There have been issues in the past regarding unreliable access, of some servers, at times. 222 depending on the Draytek's failover position. 20. The first thing 3CX Support is going to ask about. 3cx. How to configure Grandstream GXP. 115 and the IP address from where the last point which contacted the STUN server received the STUN request was 10. Factory default of W60B. 111 or 222. TUN server stun3. Hi ittogo, This depends on your implementation and specific requirements however here are the pros and cons of each: 1) SBC. I have just seen that the stun functionality for the DECT has been removed in V15, we lose in functionality for the hosting mode, think you give this Firewall test results: resolving 'stun-au. Hi, yes in some way you are right, but when i call to a extension in the LAN with the same range of ip address 130. Also noticed that Yealink phones provision from 3CX with a preset STUN server address 217. Check the “Turn off STUN requests” check box, enter the “Static Public IP” of the server and “Select Network card Interface”. Un servidor STUN (Sesión Traversal de User Datagram Protocol [UDP] a través de Network Address Translators [NATs]), permite a los clientes NAT (tal como computadores detrás de un firewall), configurar llamadas telefónicas a un proveedor VOIP alojado afuera de su red local. sipphone. It appears as if the STUN request exits the network (external IP), only to come back to the 3cx host - in principal. com' failed ( How to resolve?) I have changed the settings in the Network area to Static IP and my dashboard recognises the static IP. #1. 3CX Advanced certified engineer. Learn More. 10. to the other. Set the “Port” to 5061 and set the “Transport” to TLS. 132:5060 to xx. We can access the webui of the pa3 just fine. This means that basically the screenshot of Test 2 shows a failed attempt. 2 of them have a firewall and the other one doesn't. Joined Aug 18, 2006 Messages 1,294 Receiving this message STUN request to STUN server 45. This module covers Remote STUN IP Phone configuration; the prerequisites, By default the STUN server address is the 3CX server FQDN or IP address. 14, the public IP from where the Binding request was received is 78. I'm using stun. Subscribed. Try putting the PC running 3CX on DMZ, see if it works, then go back and "revisit" the port forwarding (and other) options. Please note you should *not* use the configuration assistant of Linphone since the config. This guide will show you how to auto-provision your Yealink T4 series IP phone for use with the 3CX ® Phone System. the actual call. En STUN-server (Simple Traversal of User Datagram Protocol [UDP] Through Network Address Translators [NATs]) giver NAT klienter (det vil sige computere bagved en firewall) mulighed for opkaldsopsætning gennem VOIP-leverandører, som befinder sig udenfor det lokale netværk. In the PBX we have all the SIP ports and RTP ports all different from each extension. Nov 7, 2007. . 200. I already have V5. On-Premise It's a free download and the WinStun client will let you check the response from any stun server. If calls to a provider use an IP that you datafilled, but has since changed, then external calls will not work properly. I have asked my Internet provider to open the ports I use 5060 and 9000-9100 ( as I use the default configuration that 3CX sets after the Archie from 3CX, kindly replied to one of by questions as follows, it points to maybe the Draytek not providing one-to-one nat, but symetrical . 168. All the settings appear to be fine. The #1 Communications System! 12,000,000+ users everyday. You need to provide more information. 2- port forwarding on the router where remote ip phone connect to. Read More For free support, try first with 3CX StartUP or a 3CX hosted install using a supported SIP Trunk provider. @nobody. I've been a 3CX partner for a few years. 9 Provisioning Method: STUN All Firewall ports are open (including STUN ports) We have a T29G, a T21P_E2 and some W60B/W52P hardware that works perfectly, however the T20P devices does not register over STUN. Claas Felix Beyersdorf. (stun. This is by design. resolving 'sip-alg-detector. Joined Dec 12, 2008 Messages 2,584 Reaction score 785. Configure your Grandstream GXP16, 17 and 21 series for use with 3CX ® Phone System. Thanks for the reply, but that wasn't the question. The phone was rung but I couldnot hear/speak to the other person. Hi, I'm encountering the problem, of no audio/sound at telephone calls between two IP-Phones SNOM 720 connected over LAN. com one, and put another public stun server as your stun server. 5. 98. These types of installs require paid technical support. Do not leave them empty because these are legacy options that were in the very beginning of 3CX. Vali_3CX. SIP Server ID: 12295 10/28/2021 9:23:51 AM. from Debian 10 to Debian 12) We take nightly backups. The only other STUN related message in the activity log that shows is: [blanked IP is that of stun3. Hosted or On-premise. Setup W60B in 3CX “FXS/DECT” tab. linphone. How to Configure a STUN Server in 3CX Phone System for Testing. Everything works great except BLF. 10 for 6 months. By the way, if you are using more than a couple of phones at that May 5, 2021. com The phones would not register until I did this. [CM306002]: There is no valid STUN server specified! External IP can not be resolved. My 3cx phone system (version 3. Use the “Add” button on the right to add a new rule. 3CX hosting frees your time and resources as we manage your 3CX system for you. You can find the Windows scripts here. i have 3cx (and stun on the same machince) in the dmz, client (my pc) is in the local network that is devided from dmz with isa server. No response received or port mapping De STUN-server is te bereiken via UDP-poort 3478, maar de server (die twee IP-adressen heeft) laat clients ook tests uitvoeren op alternatieve IP’s en poorten. Everything worked well so far, till the dynamic IP address changed. 3CX Support. A STUN szerverrel a 3478-as UDP porton keresztül lehet kapcsolatba lépni, azonban a szerver azt ajánlja a kliensnek, hogy teszteljen le több IP és port számot (a STUN szervereknek két IP címe van). Fadri Malgiaritta. Paste link into SIP Server URL tab. Most of which will be set up on Yealink cordless phones. By default, 3CX Phone System assumes that From the 3CX Management Console, go to, “Settings” > “Network” > “STUN server” tab. To tun off STUN resolution, from the 3CX Management Console, navigate to “Settings” > “Network” > “STUN server” tab. 14. Give each phone a different sip Port, different range of rtp ports. Otherwise, those phones maybe cause one way audio even those can success registered to 3CX box. In this post we show you how to enable STUN in order to test 3CX Phone System using a A STUN (Session Traversal of User Datagram Protocol [UDP] Through Network Address Translators [NATs]) server allows NAT clients (i. 50. 31. 0. Setup port forwarding on the router protecting the phone , so that the correct sip, rtp ports are going to the correct ip address of the phone. I have not done any firewall configured (actually its off). Máy của STUN cho phép máy khách tìm ra địa chỉ công In this post we show you how to enable STUN in order to test 3CX Phone System using a dynamic public IP address. 0 on the firmware. com Port 3478 Timeout time for STUN response (ms)3000 Recheck external IP every (sec) 1200. HOSTED OR DIY. 3CXon Debian (cloud hosted) 3CX Version number: 16. com' done resolving 'stun2. Select “3CX Hosted - PRO/ENT” and click “Next”. Login to W60B local. What could be the issue here? 這些資訊將被用於建立客戶終端與voip服務商之間的udp通信，以便實現通話。stun協定在rfc 3489中予以定義。 雖然是在udp 埠3478連接stun伺服器，但會暗示客戶終端在另外一個ip和埠號上實施測試（stun伺服器有兩個ip位址）。rfc 規定這個埠和ip是隨意的。 Supported SIP Trunks. com:10000 (just to mimic your suggested example) and my phone would not register. On page 3 of the attached manual it shows you how to log in and edit the settings. My dashboard successfully sees and deploys the configuration but my phone only loads the Redirector and when I pop in my info it just says "Updating Config" then says "Update Skipped!" Ive factory reset it, made sure it had the latest firmware provided by STUN queries from our 3CX server either return 111. com 56. The phones aren't showing up in 3CX and the extensions aren't registered. Mar 18, 2020 #8 With STUN servers set all to the 3CX ones as suggested above the log looks like this: I have a stun server Vovida. My question is: How normal is this? Could this be a security issue? I would only expect 3cx to initiate STUN requests, rather than receiving. Is this firewall issue? On 3CX installation I change the default ports for HTTPS and SIP. 58. 2. This machine will be dedicated to 3cx. Aug 2, 2019. Your messages both seem to indicate a registered state, but your description seems to indicate they are going unregistered. 12,000,000+ users everyday. The firewall checker has passed This openfire server have also stun server and you need 2 ip free. Therefore, the STUN server setting indeed to be configured. How to configure your Yealink T5 series IP phone for use with the 3CX ® Phone System? ☛ Visit us, follow the guide and learn how! 1- port forwarding on the router where 3CX Server connect to. 23 has timed i have this problem : CM506004]: STUN request to STUN server 64. Gizmo claims its stun port is 3478 but no evident way to incl that in 3cx config; tried making stun setting in 3cx first stun01. I setup the devices manually. 132:5060. When I add stun server (stun. I installed V6 in another machine with IP x. 79. Attached to 3 Grandstream GXP2135 phones, using a Wiretap SIP trunk. Mar 28, 2008. com for the sip server I entered the public IP of my router (which is static) and the sip user id and authentication id I set to the extension that I have set up for it. As well as edit the Inbound and Outbound rules in the SRX5308 and the settings on the 3CX phone server to use the . com has second address 198. Call Queues & Ring Groups. com or stun2. Saqqara said: You only need to setup the port forwarding on the firewall protecting the stun phone. A mix between Yealink W52P and W60B base stations. I am trying to setup a Cisco SPA112 on a cloud-based 3CX PBX running version 15. Select “Normal Phone” and enable the option to “Configure your phone manually without provisioning”. STUN is used to determine that type of NAT you are behind and your public IP. But as explained by Yiannis, you cannot use that device "directly to the system". Have you unticked, under options for the extension - ‘allow stun or remote’ (cannot Reaction score. Also make sure you actually set the STUN server on the device. 1) and 3cx phone are located at 2 different private network. Questa informazione è usata per impostare la comunicazione UDP tra il client e il provider VOIP in modo da stabilire una chiamata. fwdnet. Staff member. 1 [Extn] is terminated: Cause: BYE from PBX. - Do a search on this forum, to get stun to work with 3cx you have to make changes to the firewall, etc as per url I posted. Die IP-Telefonanlage von 3CX bietet reibungslose Unterstützung für STUN. Feb 26, 2020. com 4. The only solution i have found is to reset the phones to factory and Edit your extension, under Options > Restrictions and disable “ Disallow use of extension outside the LAN (Remote extensions using Direct SIP or STUN will be blocked) “. Hi Peter, In Test 2, the PBX sends the STUN request to IP A of the STUN Server, but then the STUN server replies from IP B which the PBX doesn't know. org if needed). Cannot perform Firewall check. Con l’evoluzione della collaborazione e della comunicazione in tempo reale, Server STUN continuerà probabilmente a svolgere un ruolo significativo, potenzialmente con progressi nelle misure di sicurezza e nell’integrazione con altri protocolli di rete. 111. I don't see 3CX having any tricks up their sleeve to help you bypass this. No you are correct - you do not need stun since you have a static ip which is punched into the configuration. Your instance will be set up; Once ready, you will get a link to login to the 3CX Admin Console. Consequently, I blanked out the 6 STUN fields. Click install, click protocol, click "Have Disk", typ the following directory: c:\windows\inf and choose Internet Protocol (TCP/IP). - Does not need port forwarding in the remote firewall in front of the phones like in STUN. com to see if that would fix this issue and it didn't. com, and stun3. It is probably going to be the only way around this. WHY 3CX. By default the STUN server address is the 3CX server FQDN or IP address. The 3CX server constantly stated it was "detecting" the IP on the status page, and after 9hrs, the DNS never updated for our FQDN to the new IP. biteappy. No Phone is paired with W60B. mydomain. Good day, Currently running into an issue with a client who recently got their Fortigate firewall upgraded to 7. I am having trouble figuring out what I need to do. name to there ip address so if one goes down the system will switch. Configuration is easy with the user-friendly All the other Fanvil x6u phones work just fine. I have x2 questions: 1. Save yourself alot of issues, install a SBC server If you have to use stun, make sure you configure the phones the 3cx supported way . I run a botique VoIP company that Public STUN server list. That's mean those phones are under NAT via internet connection. And they were extremely emphatic about it. 95 port 3479. 138. Wardy. I am using the media server and have also checked external extension for the external extension. I was having the same problem this morning and found changing the STUN servers worked well. I have changed my Yealink This test checks that the 3CX PBX is able to communicate with the STUN server running on the internet from the port being checked. 221. STUN (Session Traversal Utilities for NAT) is the protocol used to discover your public address and determine any restrictions in your router that would prevent any direct connection At the remote office, each VoIP device has its own static IP and its own local SIP port. xx. Customer Joined Jan 22, I had stun server problems today. Proceed to the next step. Joined Dec 6, 2016 Messages 1,246 Step 1: Setup the phone in 3CX. Thank you! On the phone I had to enable "NAT Traversal" and add same stun server as on 3CX (supplied by SIP trunk provider). 4; Provisioning Method: Local / VPN / STUN / SBC - Stun; Trunk Provider or Gateway Make/Model - IPNX; Has the Firewall Checker passed: YES / NO - No; Are custom Jan 6, 2017. If 3CX relies on a STUN server to determine the current public IP, then it would be kept up to date, if, and when it changed. “Protocol”: Set the protocol type depending on the port (s) you are May 31, 2016. If I call the external extension from the internal I see : 21:04:26. I set the stun server as stun. stun3. Sep 20, 2017. Hi, The stun server doesn't seem to be detecting my external IP and is instead sending the internal NAT IP to my VOIP provider. Last edited by a moderator: Nov 11, 2022. Er besitzt zwei IP-Adressen und weist Clients an, auch Verbindungstests über eine andere IP-Adresse und Port-Nummer ADMIN MOD. Hi. As seen in a previous article, STUN protocol plays an important role in VoIP implementations: to discover the presence of NAT and to learn and use the bindings allocate to the client by the NAT. Hosted: StartUP/Dedicated; DIY: Private cloud/On-Premise; For free support, try first with 3CX StartUP or a 3CX hosted install using a supported SIP Trunk provider. Click “Configure a phone” to add a phone. com server. I'm trying to use 3cx phone on a Windows Vista machine, and I'm getting a STUN check fail stun is not going to work for you, if you have multiple phones are the same location. Port 9000-10999 (inbound, UDP) for RTP (Audio) communications, i. Currently I have 2 Dlink C160s VOIP DECT Cordless phones, one of which I am No bro. archie. If you do a search on the net you should be able to find a list of public STUN servers. Make sure the SIP port is always unique for each phone at that site, and the RTP range is also unique (it should not overlap with that of other phones). net, 2) stun. Every phone has set up a different Local SIP Port. 158. If you can do a Ping to outside sites (URL's), then you are connecting to a DNS server properly. I've setup gateways across the 3CX SBC with success but wouldn't recommend it due it's un-supported status. #3. To 3478, which is the default stun server port. In your case, this looks successful, from your screenshot, you are sending a packet from xx. 783 [CM503004]: Call (1587): Route 1: Ext:Ext. Agree with @craigreilly if you are familiar with the logs on 3CX however my best guess is that you have not (or have incorrectly configured) the outbound rule(s) on the system. com) in my 3cx phone's configration, 3cx phone failed to register. Lo STUN protocol è definito nel RFC 3489. I'm using Cisco 525G2s and everything works great but they dropped off about an hour ago and I've tracked it down to an issue with the stun. net and stun. itgs. com to stun. Cjay . The user of Openfire and 3cx work together for give all the services seen make gizmo project. But the 3cx web view clearly states my (correct) public IP Adress and the stun servers are correctly set up and the ports are correctly forwarded (see attachments) Attachments 3cx 2022-05-18 21-55-44. 143. \r\nThis might cause problems if you STUN request to STUN server 192. The reason was, that the option "PBX Delivers audio" was set to all extensions. every 10 secons. 65) and changes port 5060 to port 15060. Not an option (private installation) Even with the default 3CX STUN servers no update happens. Why? Your ip never changes. Sadly the manual doesn't refer to testing STUN. Apr 18, 2022. In more detail:4. This guide will show you how to automatically provision Fanvil X and XU Series IP Phones directly through the 3CX. 198. 6. I have 2 current installs both running behind (the same) dynamic IP address and therefore reliant on STUN. which are closed. Laut RFC 3489 sind dieser Port und diese IP-Adresse nicht fest vorgegeben. Select Generic IP Phone. => I think, this was the reason, that the configured codec G. It could do as it says and accept a blank entry as the default is "5060". But it has STUN client which sends requests to external STUN servers, which usually set at port 3478. STUN functionality is seamlessly handled by the 3CX software that C2 Communications relies on. stun 서버는udp 포트 3478에 연결되지만 서버는 클라이언트가 대체ip 및 포트 번호에서 테스트를 실행하도록 힌트를 제공합니다(stun 서버에는 2개의 ip 주소가 있음). On the firewall protecting the 3cx server, you only need to setup the default 3cx ports - nothing extra is required for the stun phone. 472. landfiets. Thread Address mapping failed on STUN server 194. The problem that happens is "no audio", usually incoming, and usually on incoming calls. In the “Query STUN server every (sec)” entry field, enter the time that the server will check STUN and Hosted Servers, reliability and call quality. Go to the “IP Phone” tab. Fill the information related to the SIP extension created on the 3CX Phone System. Customer Intermediate Cert. eu” in this 4. It can and does Step 1: Disable SIP Alg in the XG. it doesn't trigger the STUN server: this is the log from a call between the ip address. com Finally for some there might be the need to run an SBC within the local network or configure the STUN server field on Linphone to resolve any NAT issues. 52. Forwarding is required - please visit the link posted above by @cobaltit and it should make things a bit more clear. 128. Phase2: The gateway (192. Server STUN (Simple Traversal of User Datagram Protocol Through Network Address Translators ) umožňuje klientům NAT (tj. enter credentials and when the phone restarts, make sure calls work. So I assume the change has not yet reached the 3cx In the “SIP Server” field, enter the IP address of the 3CX Phone System host, e. 7387 Provisioning Method: STUN Trunk Provider: May 18, 2021. 144:3478 and receiving a reply from xx. But when I checked the Server Activity Log it listed three servers that timed out, 173. Then no requirement for STUN. Rianibal. 101. Pros. 1. Hi Roy, Exactly, you will open the ports that specific phone uses, and the same goes for each other STUN phone at that site. 7. 10. When I enabled STUN on the external hostname of my 3cx host, it wouldn't work. 68. What mean this log message? MediaServerReporting::STUN. Reboot the machine (you'll get some errors from firewalls etc, it's normal): 3. Password - the password for the extension used in 3CX. Turning it to dynamic results in: STUN server stun2. Provisioning a SIP Phone on STUN3CX Firmwares - https://www. I also replaced the stun servers with non-default servers for testing, but it made no difference. Both are behind firewall. Ring Extension - the extension # you created in 3CX 3. STUN server stun3. I will not rewrite the essay on this, instructions are in this Sophos KB. Partner ID: 208220. and i make port forward on the remote router to the ip of the ip phone for ( 5065 ) TCP/UDP and (14000 - 14019 ) UDP. Hi there, I dont believe there is a way to stop stun server from trying to ping, since like you say when you remove the details it still looks for a server. 2 on x86_64 platform Guys and Girls, I attach here a rar file containing instructions and precompiled files from my system running Asterisk 1. Host with 3CX ® and let us take care of management and updates, or set it up in your Google, Azure or Amazon account with our easy setup wizard. Jun 11, 2018 #3 Thank you for reply, this is a great news for me ! Basic Certified. But when I remove stun server from my configration, registration succeed. In companies that have a stricter security policy, the SBC is fundamental, as it greatly facilitates the Oct 2, 2012. May 3, 2007. The RFC states that this port and IP are arbitrary. net, and 3) stun. Some seem to keep track of the audio port better than others. com stun3. 15. Toggle signature. And remember, you don't have to use the 3CX STUN server, if you do a web search, you will find many available to you. Check out this list of functional public STUN servers (Session Traversal Utilities for NAT) that you can use for your WebRTC based projects. STUN-protokollen er definert i RFC 3489. The ttl is 6 hours and the change occured about 48 hours ago. The 3CX logs and temporary files were deleted to conserve disk space. Get a full-featured PBX with 3CX ® and integrate with website live chat, WhatsApp and text messages, all in one system ☛ Try PBX now! Open these ports to allow 3CX to communicate with the VoIP Provider/SIP Trunk and WebRTC: Port 5060 (inbound, UDP) and 5060-5061 (inbound, TCP) for SIP communications. 899 Leg L:14. x then you also need to go to the “Security” tab > “Trusted Certificates” and set the “CA Certificates” field to “All Certificates”. Your public IP has changed and 3CX updated your FQDN records from %1 to %2. 3CX telefonní systém pro Windows hladce zvládá funkce STUN, takže 3CXje snadno instalovatelná pobočková ústředna. IP Phones to use with 3CX. 31-may-2016 15:44:00. com . I have removed all settings under "General Settings -> STUN server options", but I still receive the message. I have a new client (potential) that wants the system to be fully cloud, NO SBC/VPN! This client will have 140+ Fanvil devices connected to our hosting server. NAT is an indication that phone is behind a router, in some cases PBX will detect its public IP, based on IP packets source address (check again result in Phones menu of the PBX), it may work or Just for get the stun. AuthID - the authID for the extension used in 3CX 4. Make the . Try the firewall test and see the results. Hi, STUN can be a bit tricky when it comes to audio issues, and it usually comes down to firewalls blocking the audio traffic (even when you think you opened the ports) or SIP-ALG messing with the traffic in unpredictable ways. 2. It might just be easier for you to put the stun server addresses in and leave it. 245. Status Not open for further replies. Following are the installation details 3CX Version: 15. Reaction score. Server OS, Debian 9 ; Is the 3CX Server Hosted and where? Hosted - windows Azure; IP Phone Make/Model/Firmware - Grandstream GXP 2130 firmware 1. Jaco_de_Beer. X to . Configure extension in 3CX IE: 6201. And the STUN server the phones should be using is your 3CX instance itself. Feb 11, 2008 #3 stun. While it may work in STUN, all bets are off. Stun resolution failure. com A quick fix would be to open the ports to the whole world but we would rather avoid that and only open them to our SIP Trunk Providers and 3CX STUN Servers. Hello, I am new on 3CX and had gone through the following thread link but still facing the problem with phone registration. May 3, 2019. com and then stun01 Hi, I was trying to configure remote extension using STUN but when I do a firewall check in phone system I am getting similar message below "STUN servers are not reachable. com' I'm really keen to test all points of failure starting with the windows 11 pc, the 3cx server and the SIP provider . You can try using a different STUN server. For those that had this problem I found a "possible workarround": The problem is that the NAT protocol changes the ports once the shoket is sent to the STUN server. Joined Nov 8, 2008 Messages 79 Reaction score 1. So it uses stun to ask what its ip is. We’ve added more of the remaining V18 features into another release candidate for V20. If it does not have a web interface, I think I will be able to configure it with TFTP server XML files like you said, a bit more complicated, but I think will work. I'm just wondering why my server activity log keeps getting flooded with this message. ideasip. Yes – if you intend on using a 3CX client, Bridge Presence, Remote IP Phones from outside your LAN and 3CX WebMeeting functionality. DNS problem, or internet or network issue. CM506004]: STUN request to STUN server 64. On the PBX (3cx) i have set the stun server to stun. Edit your extension, under Options > Troubleshooting and enable “ PBX Delivers Audio “. Even I have the 9000-9015 ports opened in my router, the STUN server is trying to enter using ports like 17000, 1756. 3. com These seem to work. JEDWare Development and 3CX Titanium Solution Provider located in Denmark. 22:34:46. 1. org runing on the server where the 3cx is running, when you try to use a external extension like the ipaq510 from some external conections the phone register but from some other it´s impossible to do it. Get V20 for increased security, better call management, a new admin console and Windows softphone. 62. 0. 390 [CM506004]: STUN request to STUN server 193. 125 and port @Marc Fauser Taking a Direct SIP/STUN phone home would/should require port forwarding on the home router. 6K views 4 years ago. As a workaround, we changed one of the phones on each client to port 5060 to Máy chủ STUN (Simple Traversal of User Datagram Protocol [UDP] Through Network Address Translators [NATs]) cho phép các máy khách NAT (tức các máy tính nằm sau tường lửa) thiết lập cuộc gọi với máy cung cấp VOIP nằm ngoài mạng nội bộ. The STUN server is an implementation of the STUN protocol that enables STUN functionality in SIP-based systems. Log indicates there are issues talking to the pre-configured 3CX Stun servers: stun-us. View attachment 6650. We didn't make any changes on 3cx nor the firewall. If ever still won't work, kindly try to update the I can even reprovision the phone from the 3CX server's Management Console. com stun2. com Leave ports at 3478. Go to the Users tab in the Admin Console. For any help conctac us For use this stun server there two system for 3CX 1. Server STUN rimane una pietra miliare per l’attraversamento NAT in varie configurazioni di rete. 14. The Server Event Log simply said: STUN server 173. 71. 1,033. com it is not a fixed . eu” in this example), and click on Save. The STUN/Direct SIP aspect of the setup is just for registration of endpoints to the 3CX server and has no bearing on outbound calls per say. I uses 3CX softphone debug feature and it shows OK no problem. com:3478'. Just dropped in a brand new T54W Yealink phone and trying to provision via STUN. Assuming that you want both a ringer and paging function, then allow SIP Register and Jun 6, 2019. If you provision the phone using STUN, then the phone STUN Server/STUN Port contain the FQDN and SIP Port of your PBX. Everything seems to be working OK, but my logs keep getting filled up with these "There's another STUN server that resolves to the same IP:" errors. Reboot the router phone so that it will ask for credentials. 1) forwards the request to STUN server (64. Sep 16, 2010. 241 as the secondary WAN IP Address on the SRX5308. Fanvil Phone: Log in to the phone’s web interface on the browser. The first test was without tunnel using the "I am out of the office - external IP xx. How to configure Yealink T5 Series. Go General -> General Settings -> STUN server options and change to the following :-stun. every thing (the firewall checker is done . leejor. STUN servern kontaktas på UDP port 3478, men servern föreslår klienter att genomföra tester även på alternativa IP- och portnummer (STUN servrar har två IP adresser). Both versions are local & running v16. Feb 8, 2017. com) and 3cx with FQDN from 3cx in the format (mydomain. The first test passes but there is no response for the second test: View attachment 6651. It could be like the field below it that states " STUN server Port (default is 3478)" and then prefill the field with "3478". It was a STUN server. e. With a little help I found out is was the connection to the STUN server. 128:3478 has timed out YOUR CHOICE OF 3CX. STUN simply means that they traverse NAT on the phone side and it also fixes dynamic IP issues. Der STUN-Server wird auf UDP-Port 3478 angesprochen. Hello, I stared using 3CX installations on Google Cloud. The firewall blocked the port. stun 프로토콜은 rfc3489에 정의되어 있습니다. 80. elastix. Feb 7, 2024. Manually Configuring your EOL Yealink T41P, T42G, T46G, T48G phones. ekiga. To my knowledge, the STUN servers have never been used with this install. X. I have tried all versions of firmware available on the IP Phones to use with 3CX. For each IP Phone installed at the same Remote Location, set a: A couple notes: I wanted to Geofence as much as possible to limit attack vectors - but how tight you can make it depends on where your 3CX STUN servers are. Thanks. Much can depend on the router at the remote end. #6. Now my log is full with: 23:57:10. Here is the list of stun servers we now use. 6. Joined Jul 17, 2007 Messages 243 Reaction score 0. The STUN server is contacted on UDP port 3478, however the server will hint clients to perform tests on alternate IP and port number too (STUN servers have two IP addresses). I understand that the problem is with the own certificate. Those seem to be in PA, Italy, and FL, Has anyone else been experiencing some outages due to the Stun servers going down? On two recent events I have had to toggle all of my remote spa504 phones from the current stun server to the alternate. De RFC geeft aan Der STUN-Server wird auf UDP-Port 3478 angesprochen. com and the sip errors went away and it's correctly resolving my public IP via STUN requests. Phase3: The STUN Server (64. This configuration is not supported" Our 3CX phone system behind a SonicWall Firewall and I can see the NAT is configured Den här informationen används för att sätta upp UDP kommunikation mellan klienten och VOIP leverantören och etablera ett samtal. This It just takes a bit of time ensuring that the correct info is added as it isn't laid out the same as 3CX. STUN is a method allowing client to register with its public IP address and port to the PBX, you may check result in Phones menu. The only major feature not currently in V20 is “Scheduled Reports” - this will be redesigned and become available in Update 1. com on a x86_64 running Linux on 2010-10-06 16:25:35 UTC I am implementing a new 3CX system with STUN extensions. 12. com just dont work I found an article on voip-info. So any different STUN server than 3CX is invalid? Basti M. 56. 3CX: Warning About V20 (and an unacceptable response from CEO) Discussion. Select either “3CX FREE” or “3CX SMB”. 3CX is tryng to connect to STUN with internal network. The stun is needed for the server when it does not know or cannot guarantee consistent value of a public ip. 663 CallConf::Rejected [CM103005] Call(2) is rejected Aparently stun. 159, Sends a classic stun request to stun. Under Subscriber Information I have provided the Extension Number for the Display Name, User ID and AuthID (Enabled AuthID) plus the password as per my extension Jun 24, 2019. Hi Friends, I am new to IP telephony , I have just setup 3CX phone system which is behind a ADSL router. As soon as I made this change, both my lines registered fine. 229:3478 has timed out Test 1, 3CX sends a STUN request to the STUN Server on IP A, and expects an answer back from IP A. Normally, you would port forward SIP and RTP ports to the phone on the remote site. and the Cisco 7841 does have a web interface. Info. If preventing the use of VoIP is what the ISPs have been instructed to do, then blocking the standard ports used by STUN is probably a part of that. All my ports in my router are still forwarded as this worked before my IP address changed. i run winstun utility and get the following: Oct 1, 2009. SIP Domain - use your hosted IP or FQDN. I have ports 3478, 5060, 5480-5488, and 9000-9049 open on my router. Apologies for my imperfect grammar. I seem to have a problem when reprovisioning my remote Fanvil X4 handsets using STUN. - --- IP STUN IP Phones to use with 3CX. This might cause problems if you use VoIP Providers. assistant is unaware of the 3CX requirement to match Customer. Thanks Arif For example, when a server has a public IP and no firewall in front of it. 33. How to configure Fanvil X and XU series. Phone models and firmware versions, what templates you are using, how are the phone connected to the PBX (local [includes VPN], SBC or STUN). com and stun3 resolves to the same IP as stun-eu. Click “Auto provision Now” button. com, stun2. But the SIP Engine might use stun for a different reason. #4. Feb 8, 2008 #2 I have my phones set to stun. On-Premise. 4. Open source code STUN Server: This project implements a simple STUN server and client on Windows, Linux, and Solaris. packets from lan to dmz are routed (not NATed). Hi, I have a an w80 dect system operating with 6 phones and 3 bases, everything is fine except for calls out to external have no audio, Incoming external is fine, internal calls both ways are fine, just outgoing external I was using stun server, but also have a vpn to the azure server and its the same if I register through that I can see in Switched Stun servers to stun. the 3CX Server is in the cloud. 22. com/support/phone-firmwares/Music: www. I have loaded the 3CX softphone onto my PC, have set me up with an extension, set up the softphone with the extension details and try to login. #13. Because of this now their STUN Yealink T58 starts populating several times in the PBX and the user reports not being able to make calls or show indication that its on a call. 5. net stun. There is a 3cx server with its own FQDN (3cx. The point of the SBC is to lockdown 5060 to your provider's IPs only. (as expected because 10000 is 5. com sip-alg-detector. 7K subscribers. 09:24:59. If you set the person up with a router phone, it connects through itself so becomes portable to anywhere, without router changes. x. Dec 3, 2020. 125. Makes things a lot smoother and faster. xten. -Tunnels remote phones to the PBX both SIP and Voice over one single port thus making VoIP Hi trying to setup phone, stuck on Wait STUN any help would be greatly appricated. 23 has timed out; used Transport: 1. Just wondering how the SIP/RTP ports need to be opened for cordless setups. We mapped our domain. The Draytek is NATing the outbound traffic to the internet and everything works a treat until we fail over to Yet, when I change the server in 3CX nothing works. I understand what STUN is, I just wasn't sure that 3cx had a built STUN server. the 3cx is been down for a while (well not up for longer than a few minutes that is) so try to use one within your country or within your ISP network. 93 and port 3478 and the response came from 151. If my users use 3CX softphone or Grandstream phone at home, they can cannot heard people talking but people can heard them no problem. 5 is not connecting anymore to the STUN Server. Info below: 3CX Version: Standard Annual 18. We're in the process of a 3CX phone system rollout that will handle our remote sales. The one thing I did was increase the block time to a week, they'll use up all their STUN server stun. When I check the debug it tells me with red: STUN check failed. com on 3CX softphone and Grandstream phone and it is still one way audio. So it doesn't expect port 3478 to be opened for incoming. The thing that had me scratching my head originally is the Put the stun servers as they were. The firewall test shows green, so I don't know where the problem is. 247. 209 2,842. En STUN-server tillater klienter å finne ut av sin offentlige adresse, hvilken type NAT de sitter bak og hvilken internettport på NAT-et som tilhører lokalporten. 220. So make sure stun server fields are populated. Hey Guys & Gals. 241 as the WAN IP Address for the meantime. ; Specify the location of your failover scripts. By default, 3CX Phone System assumes that you have a static public IP address and disablesthe STUN [+] The post How to Configure a STUN Server in 3CX Phone System for Testing appeared first on 3CX . We manage 3CX and the operating system, including security patches and version upgrades (i. The responses will indicate to Hello, Today I noticed that our 3cx server receives some STUN requests from public IP addresses and responds to them. md ac vd ac us ts vd nd vz fd