Hi all Iam running Iptables on Redhat 9.0 iptables version 1.2.8 with additional -P-O-M patch iam running transparent cache with Squid i have one Public IP and 350 users, with private IP 192.168.10.0, 192.168.20.0, 192.168.20.0 with 4 NIC 1 ethernet iam using for Internet 3 NIC for home users iam doing masq with external interface everything work fine but when i try to join Voice chat is yahoo You are not authorise to join voice conference but some of them are working.. my doubt is , is there any limitation of yahoo chat will does for some connections coming with one IP any body have same kind of problem Please any solution will be appriciated hare