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// Other services

Port 3328: Eaglepoint License Manager

Port 3328 is assigned by IANA to egptlm (Eaglepoint License Manager).

3328

How egptlm works

Other services
client:3328egptlmresponse client:3328egptlmresponse

The client sends a request to port 3328 and the egptlm 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 3328 dangerous?

We have no specific security note for port 3328. 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 3328

ServicePortTransportDescriptionReferenceUpdated
egptlm 3328 TCP, UDP Eaglepoint License Manager - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 3328, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3328'      # process listening on 3328
sudo lsof -nP -i :3328

macOS

sudo lsof -nP -i :3328

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3328 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3328
netstat -ano | findstr :3328

From another machine

nmap -p 3328 -sV <host>
sudo nmap -sU -p 3328 <host>
nc -zv <host> 3328

Block it in the firewall

sudo ufw deny 3328/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3328" -Direction Inbound -LocalPort 3328 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3328 used for?

Port 3328 is assigned by IANA to egptlm (Eaglepoint License Manager).

Is port 3328 TCP or UDP?

Port 3328 is registered for TCP and UDP.

Is it safe to open port 3328?

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 3328 is open?

On Linux run "ss -ltnup 'sport = :3328'", on macOS "lsof -nP -i :3328", and on Windows "netstat -ano | findstr :3328" to see the local process. From another machine, "nmap -p 3328 <host>" shows whether it is reachable.

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