CyberHunter
LinkedIn profile - Bastien Cordier Email: contact@bastiencordier.pro
// Other services

Port 5555: Personal Agent

Port 5555 is assigned by IANA to personal-agent (Personal Agent).

5555

How personal-agent works

Other services
client:5555personal-agentresponse client:5555personal-agentresponse

The client sends a request to port 5555 and the personal-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 5555 dangerous?

We have no specific security note for port 5555. 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 5555

ServicePortTransportDescriptionReferenceUpdated
personal-agent 5555 TCP, UDP Personal Agent
Reported: Known UNAUTHORIZED USEs on port 5555
 - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 5555, and is it reachable?

Linux

sudo ss -ltnup 'sport = :5555'      # process listening on 5555
sudo lsof -nP -i :5555

macOS

sudo lsof -nP -i :5555

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5555 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 5555
netstat -ano | findstr :5555

From another machine

nmap -p 5555 -sV <host>
sudo nmap -sU -p 5555 <host>
nc -zv <host> 5555

Block it in the firewall

sudo ufw deny 5555/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 5555" -Direction Inbound -LocalPort 5555 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 5555 used for?

Port 5555 is assigned by IANA to personal-agent (Personal Agent).

Is port 5555 TCP or UDP?

Port 5555 is registered for TCP and UDP.

Is it safe to open port 5555?

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 5555 is open?

On Linux run "ss -ltnup 'sport = :5555'", on macOS "lsof -nP -i :5555", and on Windows "netstat -ano | findstr :5555" to see the local process. From another machine, "nmap -p 5555 <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

Latest vulnerability news

All news