The problem arises because the Cisco is SIP asymmetric. Thus, why do you
apply NAT traversal at all?
I would make something like this:
route{
if (src_ip==ip.of.cisco.gw) {
xlog("request from cisco, no NAT traversal");
} else {
force_rport();
if (is_method("REGISTER)) {
fix_nated_register();
} else {
fix_nated_contact();
}
}
...
}
reply_route[x] {
if (src_ip==ip.of.cisco.gw) {
xlog("request from cisco, no NAT traversal");
} else {
fix_nated_contact();
}
...
}
regards
klaus
Andrew O. Zhukov schrieb:
So:
if(is_method("PRACK|ACK") && !is_present_hf("Contact"))
append_hf("Contact: <sip:$si:$sp;nat=yes>\r\n");
Let me know if works.
Cheers,
Daniel
I try it. Do not working.
http://www.ipshka.com/core/fix_ask.txt
Snom use the port from INVITE, mesage not from ASK
Possible it can fix the trouble for other UA. Anyway it's not a common
solution.
Actually, if Cisco is over the port restricted or symmetric nat, without
the port mapping it's not possible to fix it at all.
Thanks Andrew.
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