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// Other services

Port 2255: VRTP - ViRtue Transfer Protocol

Port 2255 is assigned by IANA to vrtp (VRTP - ViRtue Transfer Protocol).

2255

How vrtp works

Other services
client:2255vrtpresponse client:2255vrtpresponse

The client sends a request to port 2255 and the vrtp 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 2255 dangerous?

We have no specific security note for port 2255. 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 2255

ServicePortTransportDescriptionReferenceUpdated
vrtp 2255 TCP, UDP VRTP - ViRtue Transfer Protocol - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2255, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2255'      # process listening on 2255
sudo lsof -nP -i :2255

macOS

sudo lsof -nP -i :2255

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2255 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2255
netstat -ano | findstr :2255

From another machine

nmap -p 2255 -sV <host>
sudo nmap -sU -p 2255 <host>
nc -zv <host> 2255

Block it in the firewall

sudo ufw deny 2255/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2255" -Direction Inbound -LocalPort 2255 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2255 used for?

Port 2255 is assigned by IANA to vrtp (VRTP - ViRtue Transfer Protocol).

Is port 2255 TCP or UDP?

Port 2255 is registered for TCP and UDP.

Is it safe to open port 2255?

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 2255 is open?

On Linux run "ss -ltnup 'sport = :2255'", on macOS "lsof -nP -i :2255", and on Windows "netstat -ano | findstr :2255" to see the local process. From another machine, "nmap -p 2255 <host>" shows whether it is reachable.

05 Related
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