How to run Fritz Box on custom VOIP/SIP port?

[maj0]

Hi,
Default voip port 5060 is blocked by my voip provider's ISP(not german),so SIP sever is running on 8891 port. I need to configure FritzBox to listen & communicate on 8891 port.
my register string is: mysip-proxy:8891
Then AVM do send SIP & RTP UDPs on 8891 destination port but their Source port is always 5060, so these packets are blocked by VOIP's ISP. I made telnet connection to FritzBox & restarted voipd daemon with Source port 8891 then my fritz box was able to register with my VOIP(SIP registration was corrected) but RTP or voice call data was sent with source port 5060, so no call recieve or make possible.
Can any one suggest me how to make AVM to work on 8891 custom port.

Mit freundlichen Grüßen.

majo

 

[gandalf94305]

Welcome in this forum

The voipd may be started with an option "-P 8891" to use that port for SIP. I am not sure about necessary changes in /var/flash/ar7.cfg to permit port 8891 traffic analogous to the entries for port 5060 presently defined there.

--gandalf.

 

[maj0]

Hi gandalf,
I have tried voipd -P 8891 with custom port to restart. IT registerd with SIP sever but RTP(voice call packets) are sent with default 5060 port not with 8891.
If some one have in depth knowedge of FBF, may be can give any clue.

regards.

majo