CyberHunter
Local dataset, no network
// Other services

Port 92: Network Printing Protocol

Port 92 is assigned by IANA to npp (Network Printing Protocol).

92

How npp works

Other services
client:92nppresponse client:92nppresponse

The client sends a request to port 92 and the npp 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 92 dangerous?

We have no specific security note for port 92. 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 92

ServicePortTransportDescriptionReferenceUpdated
npp 92 TCP, UDP Network Printing Protocol - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 92, and is it reachable?

Linux

sudo ss -ltnup 'sport = :92'      # process listening on 92
sudo lsof -nP -i :92

macOS

sudo lsof -nP -i :92

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 92 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 92
netstat -ano | findstr :92

From another machine

nmap -p 92 -sV <host>
sudo nmap -sU -p 92 <host>
nc -zv <host> 92

Block it in the firewall

sudo ufw deny 92/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 92" -Direction Inbound -LocalPort 92 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 92 used for?

Port 92 is assigned by IANA to npp (Network Printing Protocol).

Is port 92 TCP or UDP?

Port 92 is registered for TCP and UDP.

Is it safe to open port 92?

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 92 is open?

On Linux run "ss -ltnup 'sport = :92'", on macOS "lsof -nP -i :92", and on Windows "netstat -ano | findstr :92" to see the local process. From another machine, "nmap -p 92 <host>" shows whether it is reachable.

05 Related
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