One clarification: I'm having to do this without using CGI::Cookie, so I just do print "Set-Cookie: blahblahblah" instead. I had tried using just the IP before and it didn't work--in fact, I was having trouble getting any cookie at all to set. I just realized that I was leaving out the "expires" and "path" fields though. Seems to work fine when I put those fields in, even if they're blank. Thanks!