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// Other services

Port 3395: Dyna License Manager (Elam)

Port 3395 is assigned by IANA to dyna-lm (Dyna License Manager (Elam)).

3395

How dyna-lm works

Other services
client:3395dyna-lmresponse client:3395dyna-lmresponse

The client sends a request to port 3395 and the dyna-lm 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 3395 dangerous?

We have no specific security note for port 3395. 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 3395

ServicePortTransportDescriptionReferenceUpdated
dyna-lm 3395 TCP, UDP Dyna License Manager (Elam) - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 3395, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3395'      # process listening on 3395
sudo lsof -nP -i :3395

macOS

sudo lsof -nP -i :3395

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3395 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3395
netstat -ano | findstr :3395

From another machine

nmap -p 3395 -sV <host>
sudo nmap -sU -p 3395 <host>
nc -zv <host> 3395

Block it in the firewall

sudo ufw deny 3395/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3395" -Direction Inbound -LocalPort 3395 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3395 used for?

Port 3395 is assigned by IANA to dyna-lm (Dyna License Manager (Elam)).

Is port 3395 TCP or UDP?

Port 3395 is registered for TCP and UDP.

Is it safe to open port 3395?

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 3395 is open?

On Linux run "ss -ltnup 'sport = :3395'", on macOS "lsof -nP -i :3395", and on Windows "netstat -ano | findstr :3395" to see the local process. From another machine, "nmap -p 3395 <host>" shows whether it is reachable.

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