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Unread 06-02-2007, 02:38 PM   #5
advant
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Martin,

Thanks for your reply. A simple redirection of ports 2060, 3060 and 4060 doesn't seem to be working. The issue is with the Via header in the INVITE messages.

Currently it is:

Via: SIP/2.0/UDP 64.34.173.199

It should read:

Via: SIP/2.0/UDP 64.34.173.199:4060 (or 2060/3060)

In the absence of a port number in the Via header, a SIP compliant device automatically uses 5060 as the default port. Since this is blocked by the ISP, ACK messages (that are necessary for call completion) do not reach the server.

In addition to the redirection of ports 2060/3060/4060 to 5060, something that can be done to correct this issue is to run the server as below:

$ ./ser -f x.cfg -l 192.168.X.X -p 5060 -l 192.168.X.X -p 4060

I sincerely request Voxalot to consider this request as it will help so many of us that may be behind ISPs that block 5060.

Thank you very much.
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