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// Other services

Port 4111: Xgrid

Port 4111 is assigned by IANA to xgrid (Xgrid).

4111

How xgrid works

Other services
client:4111xgridresponse client:4111xgridresponse

The client sends a request to port 4111 and the xgrid 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 4111 dangerous?

We have no specific security note for port 4111. 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 4111

ServicePortTransportDescriptionReferenceUpdated
xgrid 4111 TCP, UDP Xgrid - 2004-11

// source: IANA service name and port number registry

03 Check it

Which program uses port 4111, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4111'      # process listening on 4111
sudo lsof -nP -i :4111

macOS

sudo lsof -nP -i :4111

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4111 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4111
netstat -ano | findstr :4111

From another machine

nmap -p 4111 -sV <host>
sudo nmap -sU -p 4111 <host>
nc -zv <host> 4111

Block it in the firewall

sudo ufw deny 4111/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4111" -Direction Inbound -LocalPort 4111 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4111 used for?

Port 4111 is assigned by IANA to xgrid (Xgrid).

Is port 4111 TCP or UDP?

Port 4111 is registered for TCP and UDP.

Is it safe to open port 4111?

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 4111 is open?

On Linux run "ss -ltnup 'sport = :4111'", on macOS "lsof -nP -i :4111", and on Windows "netstat -ano | findstr :4111" to see the local process. From another machine, "nmap -p 4111 <host>" shows whether it is reachable.

05 Related
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