4 Nov
2005
4 Nov
'05
8:59 a.m.
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