Hi all, Since 2 days, i have a big issue with my ISA Server Box, When I try to access our WebSite from internal or external network, I have the following error: 12206 - Boucle dans la chaîne de proxys Internet Security and Acceleration Server In English I think it will be : 12206 - The ISA Server detected a proxy chain loop Here is my configuration: Win2K Adv. Server ISA Server in Firewall and Cache Mode In the box I have 2 nic: External: IP 195.7.123.130 subnet 255.255.255.248 gateway 195.7.123.129 Internal IP 192.192.192.18 submet 255.255.255.0 All was working fine, but when I try to add a modem card to enable remote access, I need to change the router properties and nothing wan't to work. Also I decided to remove it and restore all. At this time I have the worm.MSBlaster.A virus which arrived. I apply the microsoft security patch and now nothing is going right. I check all the article from microsoft support concerning the error 12206 and my configuration seems to be right. Could someone help me very quickly... Thanks In Advance. Guillaume.