Linux server suggestions??
I'm planning to make 3 linux servers.
1st : Internet Connection Sharing/Web-Cache/Firewall (replacement of ISA Server)
2nd : Authentication server (Replacement of Active Directory server)
3rd : For File Sharing and Mail Server
I have 300-400 users (mostly windows clients) on my network. So I need some strong web-filtering and access control plus windows client authentication with linux server. I request you to please suggest me the distro for each and reliable software available in linux for the tasks. Thanks...