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// Other services

Port 1345: VPJP

Port 1345 is assigned by IANA to vpjp (VPJP).

1345

How vpjp works

Other services
client:1345vpjpresponse client:1345vpjpresponse

The client sends a request to port 1345 and the vpjp 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 1345 dangerous?

We have no specific security note for port 1345. 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 1345

ServicePortTransportDescriptionReferenceUpdated
vpjp 1345 TCP, UDP VPJP - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1345, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1345'      # process listening on 1345
sudo lsof -nP -i :1345

macOS

sudo lsof -nP -i :1345

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1345 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1345
netstat -ano | findstr :1345

From another machine

nmap -p 1345 -sV <host>
sudo nmap -sU -p 1345 <host>
nc -zv <host> 1345

Block it in the firewall

sudo ufw deny 1345/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1345" -Direction Inbound -LocalPort 1345 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1345 used for?

Port 1345 is assigned by IANA to vpjp (VPJP).

Is port 1345 TCP or UDP?

Port 1345 is registered for TCP and UDP.

Is it safe to open port 1345?

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 1345 is open?

On Linux run "ss -ltnup 'sport = :1345'", on macOS "lsof -nP -i :1345", and on Windows "netstat -ano | findstr :1345" to see the local process. From another machine, "nmap -p 1345 <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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