Chad, You are right. tcpdump shows Asterisk sees 777 when the packet
arrived.
It's truned out my router somehow modified the packet! I am using a Asus
RT-N16 router with TomatoUSB firmware. There is a setting SIP Helper.
I disabled this feature on the router then everything back to normal.
Today I upgraded my Asterisk to the new 1.4.39.1. One of sip trunk stop
working after the upgrade. Here is the sip debug:
---
--- SIP read from 208.65.xxx.xxx:5060 ---
INVITE sip:1778xxx@10.11.22.77:5060 SIP/2.0
Via:
On Thu, 27 Jan 2011 14:52:06 -0800
Jian Gao jian@sjgeophysics.com wrote:
Today I upgraded my Asterisk to the new 1.4.39.1. One of sip trunk
stop working after the upgrade. Here is the sip debug:
---
--- SIP read from
