Hi, Please help a desperate man. I have the following configuration: Internet -> 62.231.68.x/24 --ISA--192.168.0.0/24 -> Internal LAN | 212.93.159.61/30 (Isa Interface to DMZ) | | | 212.93.159.62/30 (Linux mail Server on DMZ) So, From Internet I have ping on Linux Server but I don?t have on ISA interface to DMZ. Routing is enabled and packet filters are specified with subnet for DMZ so it should include the 212.93.159.61. If I disable the interface to Internet and the interface to dmz and reenable them everything it?s working ok. After that, if I restart the firewall service or if I reboot the machine bye bye ping on 212.93.159.61 from Internet. Also if I stop the firewall service I have ping on 212.93.159.61. This interface is crucial because I have to publish on it a dns server and a mail server. I?ve also try put specific packet filters for it but no result. I don?t know what to do anymore (except to hang myself). Thx a lot in advance.