Alright, correction time! It’s the game port (2456) and Steam port (2457) we’re most interested in for Valheim, not 2224. Update your router’s port forwarding to:
- 2456 (TCP/UDP)
- 2457 (UDP)
If there’s still no joy, confirm that the external clients connect using your actual external IP (check it from a site like whatismyip). Test it out and holler if it’s still sulky! 
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