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// Other services

Port 4083: Lorica outside facing (SSL)

Port 4083 is assigned by IANA to lorica-out-sec (Lorica outside facing (SSL)).

4083

How lorica-out-sec works

Other services
client:4083lorica-out-secresponse client:4083lorica-out-secresponse

The client sends a request to port 4083 and the lorica-out-sec 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 4083 dangerous?

We have no specific security note for port 4083. 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 4083

ServicePortTransportDescriptionReferenceUpdated
lorica-out-sec 4083 TCP, UDP Lorica outside facing (SSL) - 2008-02-28

// source: IANA service name and port number registry

03 Check it

Which program uses port 4083, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4083'      # process listening on 4083
sudo lsof -nP -i :4083

macOS

sudo lsof -nP -i :4083

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4083 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4083
netstat -ano | findstr :4083

From another machine

nmap -p 4083 -sV <host>
sudo nmap -sU -p 4083 <host>
nc -zv <host> 4083

Block it in the firewall

sudo ufw deny 4083/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4083" -Direction Inbound -LocalPort 4083 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4083 used for?

Port 4083 is assigned by IANA to lorica-out-sec (Lorica outside facing (SSL)).

Is port 4083 TCP or UDP?

Port 4083 is registered for TCP and UDP.

Is it safe to open port 4083?

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 4083 is open?

On Linux run "ss -ltnup 'sport = :4083'", on macOS "lsof -nP -i :4083", and on Windows "netstat -ano | findstr :4083" to see the local process. From another machine, "nmap -p 4083 <host>" shows whether it is reachable.

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