Appendix D: Special note about Cisco PIX firewall
Submitted by powerpbx on Mon, 03/17/2008 - 12:37
In order to make Aastra phones work outside a Cisco PIX firewall to the Asterisk server inside the firewall, we needed to remove fixup protocol sip 5060, and fixup protocol sip udp 5060 which are both enabled by default.
no fixup protocol sip 5060
no fixup protocol sip udp 5060