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// Other services

Port 5599: Enterprise Security Remote Install

Port 5599 is assigned by IANA to esinstall (Enterprise Security Remote Install).

5599

How esinstall works

Other services
client:5599esinstallresponse client:5599esinstallresponse

The client sends a request to port 5599 and the esinstall 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 5599 dangerous?

We have no specific security note for port 5599. 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 5599

ServicePortTransportDescriptionReferenceUpdated
esinstall 5599 TCP, UDP Enterprise Security Remote Install - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 5599, and is it reachable?

Linux

sudo ss -ltnup 'sport = :5599'      # process listening on 5599
sudo lsof -nP -i :5599

macOS

sudo lsof -nP -i :5599

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5599 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 5599
netstat -ano | findstr :5599

From another machine

nmap -p 5599 -sV <host>
sudo nmap -sU -p 5599 <host>
nc -zv <host> 5599

Block it in the firewall

sudo ufw deny 5599/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 5599" -Direction Inbound -LocalPort 5599 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 5599 used for?

Port 5599 is assigned by IANA to esinstall (Enterprise Security Remote Install).

Is port 5599 TCP or UDP?

Port 5599 is registered for TCP and UDP.

Is it safe to open port 5599?

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 5599 is open?

On Linux run "ss -ltnup 'sport = :5599'", on macOS "lsof -nP -i :5599", and on Windows "netstat -ano | findstr :5599" to see the local process. From another machine, "nmap -p 5599 <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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