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// Other services

Port 8100: Xprint Server

Port 8100 is assigned by IANA to xprint-server (Xprint Server).

8100

How xprint-server works

Other services
client:8100xprint-serverresponse client:8100xprint-serverresponse

The client sends a request to port 8100 and the xprint-server 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 8100 dangerous?

We have no specific security note for port 8100. 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 8100

ServicePortTransportDescriptionReferenceUpdated
xprint-server 8100 TCP, UDP Xprint Server - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 8100, and is it reachable?

Linux

sudo ss -ltnup 'sport = :8100'      # process listening on 8100
sudo lsof -nP -i :8100

macOS

sudo lsof -nP -i :8100

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 8100 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 8100
netstat -ano | findstr :8100

From another machine

nmap -p 8100 -sV <host>
sudo nmap -sU -p 8100 <host>
nc -zv <host> 8100

Block it in the firewall

sudo ufw deny 8100/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 8100" -Direction Inbound -LocalPort 8100 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 8100 used for?

Port 8100 is assigned by IANA to xprint-server (Xprint Server).

Is port 8100 TCP or UDP?

Port 8100 is registered for TCP and UDP.

Is it safe to open port 8100?

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 8100 is open?

On Linux run "ss -ltnup 'sport = :8100'", on macOS "lsof -nP -i :8100", and on Windows "netstat -ano | findstr :8100" to see the local process. From another machine, "nmap -p 8100 <host>" shows whether it is reachable.

05 Related
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