ftp.netrek.org is not currently maintained.

As you say, you will find releases on SourceForge.

You will also find them on my web site, as the Vanilla page says.
Perhaps you missed that.

It says:

Version 2.10.2 of the Netrek Vanilla Server was released on 22nd
February 2006 and may be downloaded from:

    * http://quozl.linux.org.au/netrek/

James Cameron    mailto:quozl at us.netrek.org     http://quozl.netrek.org/