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// Other services

Port 1753: Predatar Comms Service

Port 1753 is assigned by IANA to predatar-comms (Predatar Comms Service).

1753

How predatar-comms works

Other services
client:1753predatar-commsresponse client:1753predatar-commsresponse

The client sends a request to port 1753 and the predatar-comms service answers.

Transport
TCP
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 1753 dangerous?

We have no specific security note for port 1753. 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 1753

ServicePortTransportDescriptionReferenceUpdated
predatar-comms 1753 TCP Predatar Comms Service - 2011-09-15
-1753-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 1753, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1753'      # process listening on 1753
sudo lsof -nP -i :1753

macOS

sudo lsof -nP -i :1753

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1753 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1753
netstat -ano | findstr :1753

From another machine

nmap -p 1753 -sV <host>
nc -zv <host> 1753

Block it in the firewall

sudo ufw deny 1753/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1753" -Direction Inbound -LocalPort 1753 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1753 used for?

Port 1753 is assigned by IANA to predatar-comms (Predatar Comms Service).

Is port 1753 TCP or UDP?

Port 1753 is registered for TCP.

Is it safe to open port 1753?

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 1753 is open?

On Linux run "ss -ltnup 'sport = :1753'", on macOS "lsof -nP -i :1753", and on Windows "netstat -ano | findstr :1753" to see the local process. From another machine, "nmap -p 1753 <host>" shows whether it is reachable.

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