CyberHunter
Local dataset, no network
// Gaming

Port 26000: quake

Port 26000 is assigned by IANA to quake (quake).

26000

How quake works

Gaming
playergame serverposition, input, state × 60 / s playerserver60 updates / s

The game client and server exchange small updates many times per second over port 26000.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned1 registered service
Range
Registered (1024-49151)
Category
Gaming
01 Security

Is port 26000 dangerous?

We have no specific security note for port 26000. Its risk depends on the program actually listening on it. General advice for gaming services:

  • Keep game servers and their plugins updated.
  • Rate-limit queries to limit DDoS amplification.
  • Run game servers under an unprivileged account.
02 Registry

IANA registry entries for port 26000

ServicePortTransportDescriptionReferenceUpdated
quake 26000 TCP, UDP quake - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 26000, and is it reachable?

Linux

sudo ss -ltnup 'sport = :26000'      # process listening on 26000
sudo lsof -nP -i :26000

macOS

sudo lsof -nP -i :26000

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 26000 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 26000
netstat -ano | findstr :26000

From another machine

nmap -p 26000 -sV <host>
sudo nmap -sU -p 26000 <host>
nc -zv <host> 26000

Block it in the firewall

sudo ufw deny 26000/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 26000" -Direction Inbound -LocalPort 26000 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 26000 used for?

Port 26000 is assigned by IANA to quake (quake).

Is port 26000 TCP or UDP?

Port 26000 is registered for TCP and UDP.

Is it safe to open port 26000?

It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Keep game servers and their plugins updated.

How do I check if port 26000 is open?

On Linux run "ss -ltnup 'sport = :26000'", on macOS "lsof -nP -i :26000", and on Windows "netstat -ano | findstr :26000" to see the local process. From another machine, "nmap -p 26000 <host>" shows whether it is reachable.

05 Related
:25565 Minecraft tcp · moderate risk :27015 Steam / Source engine udp · tcp · moderate risk :666 doom Id Software tcp · udp :1926 Evolution Game Server tcp · udp :2346 Game Connection Port tcp · udp :2347 Game Announcement and Location tcp · udp :2348 Information to query for game status tcp · udp :2914 Game Lobby tcp · udp

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