We use exchange server 2000 on the public network. Since I installed Windows XP Sp1, we cannot acces that file server with firewall and secureNat clients. Any suggestions Thanks ---------------------------------------------------------------- Mario Simard, ing TÉLÉNET Informatique inc. Tél.: (418) 545-7070 Fax.: (418) 545-2230 http://www.telenetinfo.com <http://www.telenetinfo.com/> http://www.viago.net <http://www.viago.net/> ----------------------------------------------------------------