We have a Cisco ASA 5520 running 7.1. We have users that connect via SSL. There are times when a user tries to logon via SSL that they get login failed multiple times and then say 10 or 30 minutes later authentication will succeeed. The failed attempt happens so fast that it is almost like there is no auctual attempt at authentication, almost like it is a cache or browser cache setting, because I can use a test pc and login. When my test pc is having this issue, I can use a second test pc and authentication will work. Does anyone else seem to be experiencing this issue? Could it be a browser issue? Users are using a combination of IE 6.0 and IE 7.0.