Hi all, I have installed ISA in dedicated firewall mode. I am trying to use packet filter for certain TCP ports. I have made a allow rule for the same. When I enable the rule, I can access that application sitting on the ISA server, and when I disable it, I cannot access it. Now for the problem. I cannot access the application from a client machine on internal network if I have the ISA Firewall client enabled. I can access the application from the same client if I disable the firewall client regardless of the packet filter being enabled or disabled. I am ok with enabling the firewall client as long as my enabling and diabling the IP packet filter works the same way it does on the ISA server. I will appreciate any help with this problem. Thanks Rami.