Dear all, I've set up IP NAT in my redhat 8.0 (kernel-2.4.18.19.8.0, iptables-1.2.6a-a). The following modules are loaded, ip_nat_irc ip_nat_ftp iptable_nat ip_conntrack_irc ip_conntrack_ftp ip_conntrack ip_tables It seems almost everything works just fine in my local network, except MSN voice chat (instant message works fine). Do I need other modules to make it work, something like ip_nat_h323? Thanks in advance. cuigl