Hi all I have 2 pc's. 1 machine has ISA server installed with sp2. I need to know that why ISA machine needs proxy settings in IE,MSN,MIRC to connect to the interne..obviously the client machine required this but why ISA server Machine itself required to put all this for sxample...by default ISA sets IE port to 8080 and others messengers as 1080. so why I have to put this on ISA machine. thanks