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// Other services

Port 1799: NETRISK

Port 1799 is assigned by IANA to netrisk (NETRISK).

1799

How netrisk works

Other services
client:1799netriskresponse client:1799netriskresponse

The client sends a request to port 1799 and the netrisk 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 1799 dangerous?

We have no specific security note for port 1799. 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 1799

ServicePortTransportDescriptionReferenceUpdated
netrisk 1799 TCP, UDP NETRISK - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1799, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1799'      # process listening on 1799
sudo lsof -nP -i :1799

macOS

sudo lsof -nP -i :1799

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1799 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1799
netstat -ano | findstr :1799

From another machine

nmap -p 1799 -sV <host>
sudo nmap -sU -p 1799 <host>
nc -zv <host> 1799

Block it in the firewall

sudo ufw deny 1799/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1799" -Direction Inbound -LocalPort 1799 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1799 used for?

Port 1799 is assigned by IANA to netrisk (NETRISK).

Is port 1799 TCP or UDP?

Port 1799 is registered for TCP and UDP.

Is it safe to open port 1799?

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 1799 is open?

On Linux run "ss -ltnup 'sport = :1799'", on macOS "lsof -nP -i :1799", and on Windows "netstat -ano | findstr :1799" to see the local process. From another machine, "nmap -p 1799 <host>" shows whether it is reachable.

05 Related
:4444 Metasploit default / krb524 tcp · udp · high risk :31337 Back Orifice / elite tcp · udp · high risk :1 TCP Port Service Multiplexer tcp · udp :5 Remote Job Entry tcp · udp :9 Discard tcp · udp · sctp · dccp :11 Active Users tcp · udp :17 Quote of the Day tcp · udp :18 Message Send Protocol (historic) tcp · udp

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