Is this the answer to all our prayers? SIP protocol support (EXPERIMENTAL) (IP_NF_SIP) SIP is an application-layer control protocol that can establish, modify, and terminate multimedia sessions (conferences) such as Internet telephony calls. With the ip_conntrack_sip and the ip_nat_sip modules you can support the protocol on a connection tracking/NATing firewall. -- Dave Cotton <dcotton@linuxautrement.com>