Wow, this is a quite old (very old I would say) topic but as I've been informed about it, perhaps is it worth to add some comments here.
For some customers I'm using UCS (Univention). I can't yet compare bits and bytes with Nethserver because I don't know it very well, discovering it basically.
Obviously both have similar features but they do differ, IMHO, in term of target:
- Nethserver, as I perceive it, is an UTM, all-in-one-box machine aiming to provide all services from same hardware.
- UCS is quite close but do not intend to handle some network aspects. This server is more competing against what would be a Windows DC with additional services installed on it. It really acts as Windows DC, with DNS, DHCP, KDC relying on AD like directory based on Samba 4, including server to server replication. On the other hand, it doesn't cover firewalling, doesn't aim at acting as VPN server, well to make it short, definitely not "all-in-one" on the infrastructure (network) side.
In order to compare shared features, I need to install Nethserver and get used to play with it before I can make any comment. Some time later, for sure