[Serusers] PIX operating system SIP bug

Luca Corti cortez at tiscali.it
Tue Feb 15 10:23:26 CET 2005


Hello,

This is just to confirm that if you have a Cisco PIX Firewall sitting
between your SIP Proxy (eg SER) and your PSTN gateway (in my case a
Cisco AS5350) you need at least version 6.3 of the PIX IOS. There's a
nasty bug in versions <= 6.2 which prevents transactions to be correctly
established by blocking SDP packets.

Maybe this will save someone else time

Luca






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