Why cannot some web pages be opened with Internet Explorer?
A page does not open at all or just some parts of the page open when using Internet Explorer. Netscape displays the pages correctly, though. Possible reasons: You are using FireWall-1 version 3.x, 4.0 pre-SP7 or 4.1 pre-SP2. These versions of FireWall-1 and Security Servers have problems with HTTP/1.1 protocol. FireWall-1 4.0 SP7 and 4.1 SP2 fix these problems. By default, Internet Explorer uses HTTP/1.1, while Netscape uses HTTP/1.0. Disable HTTP 1.1 support from Internet Explorer to fix the problem.