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// Other services

Port 910: Kerberized Internet Negotiation of Keys (KINK)

Port 910 is assigned by IANA to kink (Kerberized Internet Negotiation of Keys (KINK)).

910

How kink works

Other services
client:910kinkresponse client:910kinkresponse

The client sends a request to port 910 and the kink 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
Well-known (0-1023)
Category
Other services
01 Security

Is port 910 dangerous?

We have no specific security note for port 910. 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 910

ServicePortTransportDescriptionReferenceUpdated
kink 910 TCP, UDP Kerberized Internet Negotiation of Keys (KINK) RFC 4430 -

// source: IANA service name and port number registry

03 Check it

Which program uses port 910, and is it reachable?

Linux

sudo ss -ltnup 'sport = :910'      # process listening on 910
sudo lsof -nP -i :910

macOS

sudo lsof -nP -i :910

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 910 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 910
netstat -ano | findstr :910

From another machine

nmap -p 910 -sV <host>
sudo nmap -sU -p 910 <host>
nc -zv <host> 910

Block it in the firewall

sudo ufw deny 910/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 910" -Direction Inbound -LocalPort 910 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 910 used for?

Port 910 is assigned by IANA to kink (Kerberized Internet Negotiation of Keys (KINK)).

Is port 910 TCP or UDP?

Port 910 is registered for TCP and UDP.

Is it safe to open port 910?

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 910 is open?

On Linux run "ss -ltnup 'sport = :910'", on macOS "lsof -nP -i :910", and on Windows "netstat -ano | findstr :910" to see the local process. From another machine, "nmap -p 910 <host>" shows whether it is reachable.

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