Dedicated Servers

Dedicated servers in Space Engineers allow players to connect to a third party host, rather than using a player-host, in a peer-to-peer set-up. They are game instances intended for long time multiplayer games. They don’t depend on any player and they run without render and visual/audio effects. This will result to a faster connection and a more fluent multiplayer performance with less lag.

Dedicated servers are available for everyone who own Space Engineers. You don’t need an extra Steam account, you get Space engineers dedicated server for free to your existing Space Engineers account.

Notes:

• Dedicated servers are currently allowed only for non-commercial use, so companies that host game servers or everyone who wants to host his server at such company will not be able to do so (this will be available very soon).
• In order to run a dedicated server, players don't require a licensed copy of the game. However to legally obtain the game server files, at least one Steam account needs to have a valid license.

Dedicated Servers sub-forum

Dedicated Server Guide

Router and Firewall Settings

All info taken from the Official Page