On Friday 2005-September-09 18:05, Yuwei Zhao (Wei) wrote: > Does IP-table support SIP 2.0 so I can put a SIP-telephone behind it? This hasn't been revised in almost 2 years, but ... http://www.netfilter.org/documentation/FAQ/netfilter-faq-1.html#ss1.8 There are many good workarounds, if NAT is the problem. You could use VPNs with RFC 1918 IP addresses, for one thing. Another possibility is local Asterisk servers on both ends of your voice connection. They can communicate via the NAT-friendly IAX protocol, and your SIP clients register with their local Asterisk. -- mail to this address is discarded unless "/dev/rob0" or "not-spam" is in Subject: header