I have installed and configured ISA Server and it seems to work ok, but recently I've noticed a strange behavior of my server. I have configured two protocol rules: one for SNAT clients (client address set for linux workstations) and one one for Firewall clients (which work under windows in w2k domain and use firewall client). Both rules allow All IP Traffic; but when I try to connect to netbios share port (139) somewhere in the Internet (outside LAT and DMZ) from firewall client it wouldn't work as well as when I connect to jabber port 5269 from linux. And it does connect from linux to port 139 and from windows to port 5269. I made a test and found out that it's not a problem of linux and windows. I put an IP address of one windows workstation into that client address set, and when firewall client is enabled it does connect to jabber but doesnot to netbios share, and when it's disabled it connects to nbshare but doesn't to jabber. What am I doing wrong? It's vital to connect from linux workstaions to jabber port because I use a jabber server inside intranet and a stable server exists only for linux platform. Thanks in advance. Dmitry.