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// Other services

Port 2135: Grid Resource Information Server

Port 2135 is assigned by IANA to gris (Grid Resource Information Server).

2135

How gris works

Other services
client:2135grisresponse client:2135grisresponse

The client sends a request to port 2135 and the gris 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 2135 dangerous?

We have no specific security note for port 2135. 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 2135

ServicePortTransportDescriptionReferenceUpdated
gris 2135 TCP, UDP Grid Resource Information Server - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2135, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2135'      # process listening on 2135
sudo lsof -nP -i :2135

macOS

sudo lsof -nP -i :2135

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2135 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2135
netstat -ano | findstr :2135

From another machine

nmap -p 2135 -sV <host>
sudo nmap -sU -p 2135 <host>
nc -zv <host> 2135

Block it in the firewall

sudo ufw deny 2135/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2135" -Direction Inbound -LocalPort 2135 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2135 used for?

Port 2135 is assigned by IANA to gris (Grid Resource Information Server).

Is port 2135 TCP or UDP?

Port 2135 is registered for TCP and UDP.

Is it safe to open port 2135?

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 2135 is open?

On Linux run "ss -ltnup 'sport = :2135'", on macOS "lsof -nP -i :2135", and on Windows "netstat -ano | findstr :2135" to see the local process. From another machine, "nmap -p 2135 <host>" shows whether it is reachable.

05 Related
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