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// Other services

Port 2119: GSIGATEKEEPER

Port 2119 is assigned by IANA to gsigatekeeper (GSIGATEKEEPER).

2119

How gsigatekeeper works

Other services
client:2119gsigatekeeperresponse client:2119gsigatekeeperresponse

The client sends a request to port 2119 and the gsigatekeeper 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 2119 dangerous?

We have no specific security note for port 2119. 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 2119

ServicePortTransportDescriptionReferenceUpdated
gsigatekeeper 2119 TCP, UDP GSIGATEKEEPER - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2119, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2119'      # process listening on 2119
sudo lsof -nP -i :2119

macOS

sudo lsof -nP -i :2119

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2119 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2119
netstat -ano | findstr :2119

From another machine

nmap -p 2119 -sV <host>
sudo nmap -sU -p 2119 <host>
nc -zv <host> 2119

Block it in the firewall

sudo ufw deny 2119/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2119" -Direction Inbound -LocalPort 2119 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2119 used for?

Port 2119 is assigned by IANA to gsigatekeeper (GSIGATEKEEPER).

Is port 2119 TCP or UDP?

Port 2119 is registered for TCP and UDP.

Is it safe to open port 2119?

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 2119 is open?

On Linux run "ss -ltnup 'sport = :2119'", on macOS "lsof -nP -i :2119", and on Windows "netstat -ano | findstr :2119" to see the local process. From another machine, "nmap -p 2119 <host>" shows whether it is reachable.

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