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// Other services

Port 5051: ITA Agent

Port 5051 is assigned by IANA to ita-agent (ITA Agent).

5051

How ita-agent works

Other services
client:5051ita-agentresponse client:5051ita-agentresponse

The client sends a request to port 5051 and the ita-agent 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 5051 dangerous?

We have no specific security note for port 5051. 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 5051

ServicePortTransportDescriptionReferenceUpdated
ita-agent 5051 TCP, UDP ITA Agent - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 5051, and is it reachable?

Linux

sudo ss -ltnup 'sport = :5051'      # process listening on 5051
sudo lsof -nP -i :5051

macOS

sudo lsof -nP -i :5051

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5051 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 5051
netstat -ano | findstr :5051

From another machine

nmap -p 5051 -sV <host>
sudo nmap -sU -p 5051 <host>
nc -zv <host> 5051

Block it in the firewall

sudo ufw deny 5051/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 5051" -Direction Inbound -LocalPort 5051 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 5051 used for?

Port 5051 is assigned by IANA to ita-agent (ITA Agent).

Is port 5051 TCP or UDP?

Port 5051 is registered for TCP and UDP.

Is it safe to open port 5051?

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 5051 is open?

On Linux run "ss -ltnup 'sport = :5051'", on macOS "lsof -nP -i :5051", and on Windows "netstat -ano | findstr :5051" to see the local process. From another machine, "nmap -p 5051 <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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