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// Other services

Port 1497: rfx-lm

Port 1497 is assigned by IANA to rfx-lm (rfx-lm).

1497

How rfx-lm works

Other services
client:1497rfx-lmresponse client:1497rfx-lmresponse

The client sends a request to port 1497 and the rfx-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 1497 dangerous?

We have no specific security note for port 1497. 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 1497

ServicePortTransportDescriptionReferenceUpdated
rfx-lm 1497 TCP, UDP rfx-lm - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1497, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1497'      # process listening on 1497
sudo lsof -nP -i :1497

macOS

sudo lsof -nP -i :1497

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1497 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1497
netstat -ano | findstr :1497

From another machine

nmap -p 1497 -sV <host>
sudo nmap -sU -p 1497 <host>
nc -zv <host> 1497

Block it in the firewall

sudo ufw deny 1497/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1497" -Direction Inbound -LocalPort 1497 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1497 used for?

Port 1497 is assigned by IANA to rfx-lm (rfx-lm).

Is port 1497 TCP or UDP?

Port 1497 is registered for TCP and UDP.

Is it safe to open port 1497?

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 1497 is open?

On Linux run "ss -ltnup 'sport = :1497'", on macOS "lsof -nP -i :1497", and on Windows "netstat -ano | findstr :1497" to see the local process. From another machine, "nmap -p 1497 <host>" shows whether it is reachable.

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