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// Other services

Port 1768: cft-7

Port 1768 is assigned by IANA to cft-7 (cft-7).

1768

How cft-7 works

Other services
client:1768cft-7response client:1768cft-7response

The client sends a request to port 1768 and the cft-7 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 1768 dangerous?

We have no specific security note for port 1768. 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 1768

ServicePortTransportDescriptionReferenceUpdated
cft-7 1768 TCP, UDP cft-7 - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1768, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1768'      # process listening on 1768
sudo lsof -nP -i :1768

macOS

sudo lsof -nP -i :1768

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1768 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1768
netstat -ano | findstr :1768

From another machine

nmap -p 1768 -sV <host>
sudo nmap -sU -p 1768 <host>
nc -zv <host> 1768

Block it in the firewall

sudo ufw deny 1768/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1768" -Direction Inbound -LocalPort 1768 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1768 used for?

Port 1768 is assigned by IANA to cft-7 (cft-7).

Is port 1768 TCP or UDP?

Port 1768 is registered for TCP and UDP.

Is it safe to open port 1768?

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 1768 is open?

On Linux run "ss -ltnup 'sport = :1768'", on macOS "lsof -nP -i :1768", and on Windows "netstat -ano | findstr :1768" to see the local process. From another machine, "nmap -p 1768 <host>" shows whether it is reachable.

05 Related
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