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VOIP Fritzbox after Sophos XG

mario Andrick over 6 years ago

Hello,

i've got a question about the configuration of my VOIP communication.

Today i've got a new modem so my configuration is now like:

Vigor 130 (DSL modem) --> nic1 of Sophos XG firewall --> NIC2 --> Internal Network --> Fritzbox (Voip Server).

But i have very big problems with my phones. There is no outgoing connection.

What Rules should I create in my Sophos Firewall XG?

Thanks a lot for helping me

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0 2k9 over 6 years ago

Hi,

I am experiencing issues as well and don't get the AVM 7490 SIP service to work behind the XG.

Registrations fails although I created a firewall rule that allows every kind of traffic for the desired IP address of the AVM fritzbox.
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0 rfcat_vk over 6 years ago in reply to 2k9

Hi folks,

sounds like a gateway or DNS issue on the VoIP phones.

Ian

XG115W - v20.0.2 MR-2 - Home

XG on VM 8 - v21 GA

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0 Aditya Patel over 6 years ago in reply to 2k9

Hi 2K9,

This setup should work, Proxy ARP.

https://community.sophos.com/kb/en-us/123525

Your Server will have Public address andso will your XG.

Regards,

Aditya Patel
Global Escalation Support Engineer | Sophos Technical Support
Knowledge Base | @SophosSupport | Sign up for SMS Alerts
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0 2k9 over 6 years ago

Well, I solved it on my own.

I updated to the latest labor formware 6.98 for my 7490 and made a factory reset.

Now it's working out-of-the-box without any additional firewall rule.

The AVM is now working as a client behind the XG and is only responsible for the SIP registration and DECT function.
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0 Mario Ostwald over 4 years ago in reply to 2k9

Hi i have the same setup with vigor as modem - sophos xg - fritzbox 7530 as ip client. I cant do outgoing calls, incoming are working.

What firewall rules did you setup?
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