Hi all, I installed ISA server (with SP1) on W2k server SP2 in cache mode. All is ok about HTTP et HTTPS but not for FTP. I created a protocol rule which authorised all IP traffic for all. When I try to reach a ftp site via IE, I have this error message : "ISA Server : message d'erreur étendu : 200 Type set to I 500 Illegal port command" In ISA manager, I can't create new protocols, so I have the default : FTP download only, HTTP, HTTPS et Gopher. I read a lot of mails about FTP pb and ISA in firewall mode but not with ISA in cache mode. Someone has an idea ? Thanks and sorry for my "frenchy" english ! Muriel.