On my company we have an ISA Server proxy we use to access internet, this server is managed by external administrators and we do not have access to modify its configurations. Lately we have been researching about how we can improve our connection speed caching as much as possible web pages, assets and media in general, -we are not satisfied with the current cache control of ISA Server-. Squid, polipo, Apache traffic server, came up immediately and while we were evaluating them we noticed that none of them can be used to pass-through NTLM authentication to the parent (ISA server) at least on linux. My questions are:
1- Is there any way to achieve ntlm pass-through to the parent ISA Server using Squid, polipo, ATF on windows or linux?
2- Can you provide any recommendations of a free web caching server which can do ntlm pass-through to the parent ISA Server for Win32 or Linux?
3- Any other suggestion?