CyberHunter
Local dataset, no network
// Other services

Port 1548: Axon License Manager

Port 1548 is assigned by IANA to axon-lm (Axon License Manager).

1548

How axon-lm works

Other services
client:1548axon-lmresponse client:1548axon-lmresponse

The client sends a request to port 1548 and the axon-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 1548 dangerous?

We have no specific security note for port 1548. 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 1548

ServicePortTransportDescriptionReferenceUpdated
axon-lm 1548 TCP, UDP Axon License Manager - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1548, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1548'      # process listening on 1548
sudo lsof -nP -i :1548

macOS

sudo lsof -nP -i :1548

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1548 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1548
netstat -ano | findstr :1548

From another machine

nmap -p 1548 -sV <host>
sudo nmap -sU -p 1548 <host>
nc -zv <host> 1548

Block it in the firewall

sudo ufw deny 1548/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1548" -Direction Inbound -LocalPort 1548 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1548 used for?

Port 1548 is assigned by IANA to axon-lm (Axon License Manager).

Is port 1548 TCP or UDP?

Port 1548 is registered for TCP and UDP.

Is it safe to open port 1548?

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 1548 is open?

On Linux run "ss -ltnup 'sport = :1548'", on macOS "lsof -nP -i :1548", and on Windows "netstat -ano | findstr :1548" to see the local process. From another machine, "nmap -p 1548 <host>" shows whether it is reachable.

05 Related
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