Remember ClarkConnect? Well maybe you don’t, but it was a handy little distro for running local servers. Now it exists as ClearOS, built on CentOS (in-turn built from RHEL source) and it’s a great replacement for Windows SBS for small business.
It can operate in Standalone more, or as a gateway as well which includes firewall, shaping, intrusion detection and soo much more. It comes with lots of the features and finally, we have a single server install which bundles calendar sharing!
Definitely worth a look.. see my latest article about it.