On Mar 4, 2007, at 10:40 PM, Carl Brewer wrote:

> I've had a bit of a poke around in pkgsrc and found partysip and
> ser, and am wondering if these, or anything else, would be
> recommended for pushing the SIP traffic through the firewall?
> Something like the ftp module for ipfilter, or some sort of
> application-level proxy like squid etc?

No.  'ser' is a good proxy but in SIP parlance, "proxy" means "PABX"  
or "Switch".  It does not mean "help you get through a firewall".

You really need something like an SBC or user agents that can speak  
stun.

You will probably get better help in a SIP specific forum.