[OpenSIPS-Users] ACK message loops while behind firewall

[msp]

Hi all,

My Opensips server is behind firewall. All the messages comes at port 5060
on firewall are routed to Opensips Server. Then calls are routed based on
LCR. See below:

Caller      ===>  |               |
                         | Firewall   |<====> Opensips Server
Callee     <===  |                |

Currently calls are being routed properly from caller server to callee, but
when Caller sends ACK in respond to callee 's 200-OK, Opensips doesn't route
it back to Callee, and ACK message is sent to Opensips Server itself which
creates loop. At the end Opensips server responds to Caller "483-Too many
hops" as maximum hops reaches.

Have any body done anything like this before. Let me know what should be
missing or possible fault.

thanks,
msp.
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