dns

  1. 3CX SBC - DNS + multiple Proxy entries

    Hi, i have a few questions about SBC and maybe even a feature request. We are using Yealink phones so i only can speak for those phones. We are planning to move to cloud and are preparing our phones to connect to SBC or directly as Router Phones (we have 220 devices in 31 branches, of which...

  2. 3CX App Android and Private DNS

    Not sure if anyone has come across this and really, this is just an FYI. We ran hosted 3cx v18 Linux server with no issues whatsoever. Locally, all desk phones (PoE) and mobiles (WiFi) worked great. NAT hairpin properly enabled on our Watchguard Firebox and working. The v20 release came so I...
    • Abe-C
    • Thread
    • android dns private dns
    • Replies: 0
    • Forum: Android

  3. Problème DNS Bridge entre deux 3CX V20 u3

    Bonjour, Je tente actuellement de créer un pont entre 2 3CX V20 u3 mais impossible à monter. Erreur de DNS alors que j'ai bien mis les FQDN "officel" en destination. Pourtant, sur l'OS Windows de chaque 3CX, la résolution est correcte. Côté liste noire, c'est autorisé des 2 côtés. Il y a...

  4. Loopback dns at primary site and remote vpn site

    Hello, Had a quick question on setting up loopback dns on sonicwall remote side of a VPN for my situation. I have an on prem 3cx server at one location serving those local IP phones. They also have another location that is connected to that main location over IP Sec VPN. Currently everything is...

  5. DNS entries for 3cx.ch are not available

    Today, my monitoring tool started to complain about missing DNS entries for the 3CX phone systems. All domains at 3cx.ch has begun to fail 10 minutes ago with "No DNS record" I hope this will be fixed soon.

  6. Changing DNS Name Server

    Hi, We have an On-Prem (ver 18) and it is pointing at an internal DNS Server 10.x.x.x however that linkto the DNS server has broken so I need to change that IP address. I can see on the console under Settings > Network where the IP address, Public and FQDN are listed and they are okay and do...

  7. DNSmasq internal instalation in debian distro with managment from admin console

    It will be fine to have chance to use some internal DNS and DHCP service on debian ISO file. Asterisk competitors has option to define vlan, network, etc for interfaces. There is one good product DNS Masq with complex feature. Tx to think about it.

  8. Unable to resolve "activate.3cx.com" DNS

    Hello Team! Kalispera! Over the last weeks, we are facing a problem with 3CX License Activation. The message is: "Unable to reach 3CX License Activation Server. Confirm that your Primary DNS Server is able to resolve activate.3cx.com" The problem is that nothing changed through our computer...

  9. Certbot renewing custom FQDN but not applying certificate

    Hi, We recently had to uninstall, reinstall and restore our system. After re-installing it, all was working fine apart from the SSL certificate. It would come up as the page is not secure. This is hosted on a linux AWS server. We have used certbot to find the cert and renew it. However once...
    • danaslam
    • Thread
    • custom fqdn dns doamin self hosted self managed ssl ssl certificate
    • Replies: 1
    • Forum: Phone System / PBX

  10. DNS Name instead of IP Adress in config file

    Hey. How could I change the 3CX configuration so that the phone provisioning shows a local DNS name pointing to my 3CX server? Or where can I change the file generated for the 3CX Phone on Windows application when sending Welcome Mail to set the DNS address there instead of the IP address? I...

  11. stun.3cx.com - Are there updated DNS entries for 3CX subnets ?!?

    Dear 3CX, I'd like to come back to an old forum post from late 2019 (https://www.3cx.com/community/threads/firewall-tests-stun-eu-3cx-com-and-51-91-201-8x.68865/). In this post @YiannisH_3CX states that the DNS settings might be updated. Anyhow, they weren't updated so far. Do you have any news...

  12. License Activation Issue

    We are having issues activating our license through 3CX. We're currently running the latest non-beta version of 3CX on a Windows server. If we set our primary DNS server on the server's NIC adapter to 8.8.8.8 it works fine and activates as it should. However, if we use the IP addresses of our...

  13. activation.3cx.com is not reachable

    I was trying transfer 3cx system to new computer but when i try to install I get the error : activation.3cx.com not reachable Then i stuck at installing 3cx system . I try set dns at 8.8.8.8 / 8.8.4.4 but can't resovle this problem and i try to ping activation.3cx.com and I get this message...

  14. 3CX System not working

    What do I have to do? Review your network access rules and ensure that you allow connectivity to activate.3cx.com. Outbound TCP:443 must be allowed to activate.3cx.com. Due to the nature of our service clusters, we cannot provide you with a fixed IP list. Ensure that you update your 3CX PBX by...

  15. SIP trunk does not register using proxy IP and TLS

    Hi! I encounterd the following problem using current V16.0.8.16 on Windows 10. Our provider "3" in Austria provides a proxy without a domain name (just IP address and custom port). The realm is a FQDN. IPv4 Protocol is TLS only, a certificate is provided. After configuring the SIP trunk 3CX is...
    • PHSnet
    • Thread
    • dns no register provider sip trunk tls
    • Replies: 7
    • Forum: Other

  16. Solved Deskphones don't register upon failover from production system

    Our internal deskphones are not registering with the failover server after the failover process happens. The phones are set to register with the public DNS name of the 3CX system. The public DNS name has been put into our internal DNS structure and it resolves to the correct internal IP...
    • dashbrook
    • Thread
    • custom failover dns failover ip phone phone registration registration failed version 16
    • Replies: 5
    • Forum: Phone System / PBX

  17. SIP Trunks Not Resolving (When using TLS/SRTP/Port 5061)

    Hello, I was following a recent similar thread here: https://www.3cx.com/community/threads/voip-trunks-not-resolving-since-updating-to-16-5-yesterday.72721/ I could not reply to the thread because it was marked as "Solved" -- However, I do not believe that is truly the case. When I'm using the...

  18. Can i use DNS or two public IPs?

    On perm, Version 16.0.493 Network Settings > Public IP > External IP Configuration Can I use DNS or two public IPs instead of one? WAN2 takes over when WAN1 fails, but 3CX won't be functional as it has WAN1's static IP. Thanks in advance.
  19. ECOM GROUP (Mauritius)

    First outbound call after a while take around 15-18 second to ring

    Hello, Issue on outgoing calls, First outgoing call i dial after 5-10 minutes of idle, it take around 15-18 second to hear the first ringing tone. i hang up and dial again instantly, it then ring quick as normal. issue happen every 5 - 10min i try to make a call. Using a SIP Trunk with a...

  20. 3CX Local Failover

    Hello 3CX Users, I have a question. Is anyone of You running a 3CX Failover locally (2 PBXes in one LAN) to prevent downtime in case of Hardware-Failure or Service-Malfunction? We have a customer, who would like to run exactly this setup. My thoughts on this where as following: We could...
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