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// Other services

Port 6626: WAGO Service and Update

Port 6626 is assigned by IANA to wago-service (WAGO Service and Update).

6626

How wago-service works

Other services
client:6626wago-serviceresponse client:6626wago-serviceresponse

The client sends a request to port 6626 and the wago-service service answers.

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
Other services
01 Security

Is port 6626 dangerous?

We have no specific security note for port 6626. Its risk depends on the program actually listening on it. General advice for other services services:

  • Close the port if nothing on the host needs it.
  • Identify the process that listens on it (commands below) before opening it in a firewall.
  • Expose a service only to the networks that use it.
02 Registry

IANA registry entries for port 6626

ServicePortTransportDescriptionReferenceUpdated
wago-service 6626 TCP, UDP WAGO Service and Update - 2006-04

// source: IANA service name and port number registry

03 Check it

Which program uses port 6626, and is it reachable?

Linux

sudo ss -ltnup 'sport = :6626'      # process listening on 6626
sudo lsof -nP -i :6626

macOS

sudo lsof -nP -i :6626

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 6626 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 6626
netstat -ano | findstr :6626

From another machine

nmap -p 6626 -sV <host>
sudo nmap -sU -p 6626 <host>
nc -zv <host> 6626

Block it in the firewall

sudo ufw deny 6626/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 6626" -Direction Inbound -LocalPort 6626 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 6626 used for?

Port 6626 is assigned by IANA to wago-service (WAGO Service and Update).

Is port 6626 TCP or UDP?

Port 6626 is registered for TCP and UDP.

Is it safe to open port 6626?

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. Close the port if nothing on the host needs it.

How do I check if port 6626 is open?

On Linux run "ss -ltnup 'sport = :6626'", on macOS "lsof -nP -i :6626", and on Windows "netstat -ano | findstr :6626" to see the local process. From another machine, "nmap -p 6626 <host>" shows whether it is reachable.

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