Port 25955 (bf-master)

IANA assigns port 25955 to bf-master: Bitfighter master server.

Registered (user) port, 1024-49151 UDP

Port 25955 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-master UDP Bitfighter master server Christopher Eykamp -

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

Linux: UDP 25955

sudo ss -ulnp 'sport = :25955'

Linux / macOS: which process owns the port

sudo lsof -nP -i :25955

Windows (Command Prompt)

netstat -ano | findstr :25955

Windows (PowerShell)

Get-NetUDPEndpoint -LocalPort 25955

UDP probe (no reply does not prove it is closed)

nc -vzu -w 5 HOST 25955

ufw

sudo ufw deny 25955/udp

iptables

sudo iptables -A INPUT -p udp --dport 25955 -j DROP

nftables

sudo nft add rule inet filter input udp dport 25955 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block UDP 25955' -Direction Inbound -Protocol UDP -LocalPort 25955 -Action Block

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