Hello,
On Thursday 03 November 2005 07:12, Ritesh Jalan wrote:
Pls. help us in resolving the problem that the SIP proxy server changes the Source and Destination port while replying for message. Pls. find the below message for the Reference In below message A cisco ata device (which is behind NAT with IP 192.168.10.52) is trying to register it self with SIP proxy server IP 172.16.101.10 with SRC port 5060 and DST port 5060, but when SIP proxy server replies back to the message the port number gets changed i.e SRC port 53492 and DST port 5060. Is there any way by which we can fix this port num.
ask Cisco for a fix. But from a protocol perspective there is no need for a fix. Asymmetric signaling (srcport != dstport v dstport != srcport) is completely legal in 3261. Only the rport (RFC3581) extension requires symmetric signaling. But as far as I know Cisco has or at least had also some problems with implementing rport support correctly.
Nils