I'm having problems with Sip over my firewall. I am able to establish a call from the oustide office (inbound) to my Main office.
But I CAN'T establish the call originating from my main office to the outside.
There are no outbound restrictions in my firewall (default open access), which is why I believe the problems is with the VOIP server. Note that I can connect from the outside to the inside with no problem.
1- Pix is using static nat for the VoIP server
2- I configured fixup protocol sip 5060
3- I configured fixup protocol sip udp 5060
4- Acls have port udp 5060 for sip opened for inbound access.
show timeout sip: timeout sip 0:30:00
Any feedback will be appreciated