sophos

  1. Sophos Firewall, AT&T On-prem SIP, and 3CX VM

    Good afternoon everyone! Does anyone have any good tips or pointers using a Sophos firewall and setting up 3CX as a VM? We have AT&T on-prem SIP for voice services. The thought is to set a port on the firewall to the AT&T SIP static and then set up a DNAT to point that traffic to the 3CX VM host...

  2. Random call drop and poor quality on 3CX app behind Sophos XG

    Hi all, We currently have different problem using Softphone app and desktop (v18) /webclient app on a network behind a sophos XG. Randomly, we have calls drop, one-way audio, can't answer incoming call or poor quality communication All seems fine from another location (not behind this Sophos)...
  3. TheNickHess

    port 5060/5090 not working

    We are a nonprofit running 3cx on premise getting the following w fw check We have created temporary fw rules allowing all traffic and are still not getting results in order to get phones(some supported by 3cx, some not) working with FQDN - Interesting tidbit, my grandstream does work w...

  4. Sophos XG - Firewall Test (Failing)

    Hi All, I wanted to put this to the community first before going to an actual support ticket. It was also tested with a Any to Any rule which still failed. Any ideas? Thanks Aaron
  5. theMightyMacBoy

    Solved Yealink T4XG/S Will Not Provision STUN

    As the title says, I am having issues getting our Yealink T42G and T46S phones to provision via STUN. Specs: Windows 10 3CX 16.0.622 T42G Firmware 29.83.0.130 Stock Template Firewall Sophos UTM SG Valid HTTPS cert on 3CX Web Services We have all of the required firewall ports open and DNAT...
  6. theMightyMacBoy

    Solved Firewall Checker Fails on most RTP ports

    I have setup a 3CX server to use for our company and configured our firewall ports and NATing. When I run the firewall test, the first several ports pass but then the rest fail. I am source and destination NATing all ports on one public IP for 3CX, so I don't understand why the first several...
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