CyberHunter
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// Other services

Port 3296: Rib License Manager

Port 3296 is assigned by IANA to rib-slm (Rib License Manager).

3296

How rib-slm works

Other services
client:3296rib-slmresponse client:3296rib-slmresponse

The client sends a request to port 3296 and the rib-slm 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 3296 dangerous?

We have no specific security note for port 3296. 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 3296

ServicePortTransportDescriptionReferenceUpdated
rib-slm 3296 TCP, UDP Rib License Manager - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 3296, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3296'      # process listening on 3296
sudo lsof -nP -i :3296

macOS

sudo lsof -nP -i :3296

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3296 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3296
netstat -ano | findstr :3296

From another machine

nmap -p 3296 -sV <host>
sudo nmap -sU -p 3296 <host>
nc -zv <host> 3296

Block it in the firewall

sudo ufw deny 3296/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3296" -Direction Inbound -LocalPort 3296 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3296 used for?

Port 3296 is assigned by IANA to rib-slm (Rib License Manager).

Is port 3296 TCP or UDP?

Port 3296 is registered for TCP and UDP.

Is it safe to open port 3296?

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 3296 is open?

On Linux run "ss -ltnup 'sport = :3296'", on macOS "lsof -nP -i :3296", and on Windows "netstat -ano | findstr :3296" to see the local process. From another machine, "nmap -p 3296 <host>" shows whether it is reachable.

05 Related
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