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// Other services

Port 5399: SecurityChase

Port 5399 is assigned by IANA to securitychase (SecurityChase).

5399

How securitychase works

Other services
client:5399securitychaseresponse client:5399securitychaseresponse

The client sends a request to port 5399 and the securitychase 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 5399 dangerous?

We have no specific security note for port 5399. 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 5399

ServicePortTransportDescriptionReferenceUpdated
securitychase 5399 TCP, UDP SecurityChase - 2005-08

// source: IANA service name and port number registry

03 Check it

Which program uses port 5399, and is it reachable?

Linux

sudo ss -ltnup 'sport = :5399'      # process listening on 5399
sudo lsof -nP -i :5399

macOS

sudo lsof -nP -i :5399

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5399 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 5399
netstat -ano | findstr :5399

From another machine

nmap -p 5399 -sV <host>
sudo nmap -sU -p 5399 <host>
nc -zv <host> 5399

Block it in the firewall

sudo ufw deny 5399/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 5399" -Direction Inbound -LocalPort 5399 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 5399 used for?

Port 5399 is assigned by IANA to securitychase (SecurityChase).

Is port 5399 TCP or UDP?

Port 5399 is registered for TCP and UDP.

Is it safe to open port 5399?

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 5399 is open?

On Linux run "ss -ltnup 'sport = :5399'", on macOS "lsof -nP -i :5399", and on Windows "netstat -ano | findstr :5399" to see the local process. From another machine, "nmap -p 5399 <host>" shows whether it is reachable.

05 Related
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