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// Other services

Port 1992: IPsendmsg

Port 1992 is assigned by IANA to ipsendmsg (IPsendmsg), stun-p3 (cisco STUN Priority 3 port).

1992

How ipsendmsg works

Other services
client:1992ipsendmsgresponse client:1992ipsendmsgresponse

The client sends a request to port 1992 and the ipsendmsg service answers.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned2 registered services
Range
Registered (1024-49151)
Category
Other services
01 Security

Is port 1992 dangerous?

We have no specific security note for port 1992. 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 1992

ServicePortTransportDescriptionReferenceUpdated
ipsendmsg 1992 TCP, UDP IPsendmsg - -
stun-p3 1992 TCP, UDP cisco STUN Priority 3 port - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1992, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1992'      # process listening on 1992
sudo lsof -nP -i :1992

macOS

sudo lsof -nP -i :1992

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1992 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1992
netstat -ano | findstr :1992

From another machine

nmap -p 1992 -sV <host>
sudo nmap -sU -p 1992 <host>
nc -zv <host> 1992

Block it in the firewall

sudo ufw deny 1992/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1992" -Direction Inbound -LocalPort 1992 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1992 used for?

Port 1992 is assigned by IANA to ipsendmsg (IPsendmsg), stun-p3 (cisco STUN Priority 3 port).

Is port 1992 TCP or UDP?

Port 1992 is registered for TCP and UDP.

Is it safe to open port 1992?

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 1992 is open?

On Linux run "ss -ltnup 'sport = :1992'", on macOS "lsof -nP -i :1992", and on Windows "netstat -ano | findstr :1992" to see the local process. From another machine, "nmap -p 1992 <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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