Board Thread:LotR Mod Technical Support/@comment-122.61.7.110-20170506231938/@comment-26410366-20170506234422

That would be the Official server. When you click multiplayer, push the add server button in the lower right. Put  lotr.g.akliz.net in the box labeled server address, name it whatever you want. Click done, and you should be able to join the server.