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// Other services

Port 492: Transport Independent Convergence for FNA

Port 492 is assigned by IANA to ticf-1 (Transport Independent Convergence for FNA).

492

How ticf-1 works

Other services
client:492ticf-1response client:492ticf-1response

The client sends a request to port 492 and the ticf-1 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
Well-known (0-1023)
Category
Other services
01 Security

Is port 492 dangerous?

We have no specific security note for port 492. 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 492

ServicePortTransportDescriptionReferenceUpdated
ticf-1 492 TCP, UDP Transport Independent Convergence for FNA - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 492, and is it reachable?

Linux

sudo ss -ltnup 'sport = :492'      # process listening on 492
sudo lsof -nP -i :492

macOS

sudo lsof -nP -i :492

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 492 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 492
netstat -ano | findstr :492

From another machine

nmap -p 492 -sV <host>
sudo nmap -sU -p 492 <host>
nc -zv <host> 492

Block it in the firewall

sudo ufw deny 492/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 492" -Direction Inbound -LocalPort 492 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 492 used for?

Port 492 is assigned by IANA to ticf-1 (Transport Independent Convergence for FNA).

Is port 492 TCP or UDP?

Port 492 is registered for TCP and UDP.

Is it safe to open port 492?

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 492 is open?

On Linux run "ss -ltnup 'sport = :492'", on macOS "lsof -nP -i :492", and on Windows "netstat -ano | findstr :492" to see the local process. From another machine, "nmap -p 492 <host>" shows whether it is reachable.

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