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// Other services

Port 1746: ftrapid-1

Port 1746 is assigned by IANA to ftrapid-1 (ftrapid-1).

1746

How ftrapid-1 works

Other services
client:1746ftrapid-1response client:1746ftrapid-1response

The client sends a request to port 1746 and the ftrapid-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
Registered (1024-49151)
Category
Other services
01 Security

Is port 1746 dangerous?

We have no specific security note for port 1746. 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 1746

ServicePortTransportDescriptionReferenceUpdated
ftrapid-1 1746 TCP, UDP ftrapid-1 - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1746, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1746'      # process listening on 1746
sudo lsof -nP -i :1746

macOS

sudo lsof -nP -i :1746

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1746 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1746
netstat -ano | findstr :1746

From another machine

nmap -p 1746 -sV <host>
sudo nmap -sU -p 1746 <host>
nc -zv <host> 1746

Block it in the firewall

sudo ufw deny 1746/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1746" -Direction Inbound -LocalPort 1746 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1746 used for?

Port 1746 is assigned by IANA to ftrapid-1 (ftrapid-1).

Is port 1746 TCP or UDP?

Port 1746 is registered for TCP and UDP.

Is it safe to open port 1746?

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 1746 is open?

On Linux run "ss -ltnup 'sport = :1746'", on macOS "lsof -nP -i :1746", and on Windows "netstat -ano | findstr :1746" to see the local process. From another machine, "nmap -p 1746 <host>" shows whether it is reachable.

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