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If your Killing Floor 2 server isn’t showing in the server browser, first check Console for DevOnline: Steam Servers Connected: that line means the server is online and registered with Steam. Then search for the right name (a new server shows its real name only from the second start), clear the browser filters, or join directly with open 203.0.113.10:7777 in the game console.

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Fixes for a KF2 server that doesn’t show up

  1. Wait for the ready line. Open Console. The server is ready when you see DevOnline: Steam Servers Connected and a Server data: line with the name, map and slots. Until then, it isn’t listed.
  2. Start a new server twice. On the very first start the server uses the game’s default name, Killing Floor 2 Server. Stop it and start it again, and it uses your Server Name.
  3. Search for the exact name. Copy the name from Server Name on Startup, or look at the Server data: line in Console.
  4. Clear the filters. Filters in the in-game browser can hide your server, for example the filter for servers without seasonal Zeds. Reset the filters and search again.
  5. Join by address. Copy the address from Overview, open the game console and type open 203.0.113.10:7777 with your own address. If this works, the server is fine and only the browser listing is the problem.
  6. Update your game. With Auto Update on, the server updates itself at every start. Make sure your game is up to date on Steam too.
  7. Check the map. If Map Name is a Workshop map that hasn’t downloaded, the server can’t load it. Set Map Name to kf-bioticslab and restart.

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Which ports does a KF2 server use?

Your own ports are shown on Startup and in Network. They are set by us, so you don’t need to change them. See network and subdomains.
Repeated DevNet: CleanUp: clean up connection lines in the console are normal. They come from internet scanners that touch the port, not from your players.

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Frequently asked questions

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Why can I join by address but not find it in the list?

The server works. Check the browser filters and the exact name. Until the listing shows it, keep joining with open and your address.

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Players get “connection failed”. What should I check?

Check that the server shows as running and that the console has the ready line. Make sure players use the game port from Overview, not the Query Port. If you use a DDoS filter, see DDoS filters.

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Does a password hide my server?

No. A password-protected server is still listed, but players need the password to join. See server password.

KF2 server guide

Every Killing Floor 2 page in one place.

Getting started

First start and joining.

Server name and MOTD

Set the name players search for.

Seasonal events

The seasonal Zeds filter.

Server console

Read the start-up log.
Tested by the FREAKHOSTING team on our Game Panel on 3 November 2026 (Killing Floor 2 dedicated server, version 9189). Steps may differ slightly if the game changes.

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Need Extra Help?

If you encounter any issues, our support team is ready to assist:

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Last Updated: November 2026