I have a NAT firewall and two voip phones located behind the firewall. I wanted to know if it was possible to prioritize that traffic with iptables so that my phone conversations received enough bandwidth. I apologize if this information is somewhere on the netfilter website. I looked for something related but could only find information on prioritizing quake and a few other services. I also "google" it and came up with nothing significant.
Not being able to help at the moment, according to a friend of mine, who worked at IP telephone systems, this is be a Quality of Service topic.
Voip/Sip et al will happily consume all bandwidth available - of cause, depending upon just _how_ much bandwith you're buing :p
He solved it with the build-in QOS in his router. YMMV...
-- Kind regards, Mogens Valentin
