I'm looking for a (preferably free) alternative to SME / Clark Connect.
I basically need the following:
- firewall
- nat
- VPN
- bandwidth limiting / monitoring
- email (SMTP / POP3 / IMAP) & groupware
- file & printer sharing
- RAID support
- if possible fail-over / high availability support.
Here is a free mail server solution for RHEL/CentOS 5.x: http://code.google.com/p/iredmail/