We have a commercial application we use that uses the REMOTE_ADDR for authentication. We updated to the Apache 2 web server about the same time as our IS dept. = installed a Secure Computing Sidewinder using Squid 2.4.S6. The error is sporadic, but when the application editor signs on, they may = or may not get authenticated. Once they are in and editing, they get = booted off. (Their login status changes from an editor account to guest) We wrote a little test.cgi to kick out the REMOTE_ADDR variable and about = half of the time it is wrong. (Or right depending upon your disposition) = Is this a know Squid problem? Ted Theodore F. Ronau Advanced Technology Specialist Center for Creative Instruction Medical College of Ohio [EMAIL PROTECTED] 419-383-7461