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Port 25954 (bf-game)

IANA assigns port 25954 to bf-game: Bitfighter game server.

Registered (user) port, 1024-49151 UDP

Port 25954 is normally used over UDP; the checker tests TCP only, so a "filtered" result does not mean the UDP service is down.

IANA assignment

Service nameProtoDescriptionAssigneeReference
bf-game UDP Bitfighter game server Christopher Eykamp -

Registry dates for this port: registered 2012-08-16.

Check what is listening on port 25954

Linux: UDP 25954
sudo ss -ulnp 'sport = :25954'
Linux / macOS: which process owns the port
sudo lsof -nP -i :25954
Windows (Command Prompt)
netstat -ano | findstr :25954
Windows (PowerShell)
Get-NetUDPEndpoint -LocalPort 25954

Test it from outside

UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 25954

Block port 25954 in the firewall

ufw
sudo ufw deny 25954/udp
iptables
sudo iptables -A INPUT -p udp --dport 25954 -j DROP
nftables
sudo nft add rule inet filter input udp dport 25954 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 25954' -Direction Inbound -Protocol UDP -LocalPort 25954 -Action Block

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Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.