CyberHunter
Local dataset, no network
// Other services

Port 1608: Smart Corp. License Manager

Port 1608 is assigned by IANA to smart-lm (Smart Corp. License Manager).

1608

How smart-lm works

Other services
client:1608smart-lmresponse client:1608smart-lmresponse

The client sends a request to port 1608 and the smart-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 1608 dangerous?

We have no specific security note for port 1608. 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 1608

ServicePortTransportDescriptionReferenceUpdated
smart-lm 1608 TCP, UDP Smart Corp. License Manager - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1608, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1608'      # process listening on 1608
sudo lsof -nP -i :1608

macOS

sudo lsof -nP -i :1608

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1608 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1608
netstat -ano | findstr :1608

From another machine

nmap -p 1608 -sV <host>
sudo nmap -sU -p 1608 <host>
nc -zv <host> 1608

Block it in the firewall

sudo ufw deny 1608/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1608" -Direction Inbound -LocalPort 1608 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1608 used for?

Port 1608 is assigned by IANA to smart-lm (Smart Corp. License Manager).

Is port 1608 TCP or UDP?

Port 1608 is registered for TCP and UDP.

Is it safe to open port 1608?

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 1608 is open?

On Linux run "ss -ltnup 'sport = :1608'", on macOS "lsof -nP -i :1608", and on Windows "netstat -ano | findstr :1608" to see the local process. From another machine, "nmap -p 1608 <host>" shows whether it is reachable.

05 Related
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