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// Other services

Port 1351: Digital Tool Works (MIT)

Port 1351 is assigned by IANA to equationbuilder (Digital Tool Works (MIT)).

1351

How equationbuilder works

Other services
client:1351equationbuilderresponse client:1351equationbuilderresponse

The client sends a request to port 1351 and the equationbuilder 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 1351 dangerous?

We have no specific security note for port 1351. 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 1351

ServicePortTransportDescriptionReferenceUpdated
equationbuilder 1351 TCP, UDP Digital Tool Works (MIT) - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1351, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1351'      # process listening on 1351
sudo lsof -nP -i :1351

macOS

sudo lsof -nP -i :1351

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1351 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1351
netstat -ano | findstr :1351

From another machine

nmap -p 1351 -sV <host>
sudo nmap -sU -p 1351 <host>
nc -zv <host> 1351

Block it in the firewall

sudo ufw deny 1351/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1351" -Direction Inbound -LocalPort 1351 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1351 used for?

Port 1351 is assigned by IANA to equationbuilder (Digital Tool Works (MIT)).

Is port 1351 TCP or UDP?

Port 1351 is registered for TCP and UDP.

Is it safe to open port 1351?

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 1351 is open?

On Linux run "ss -ltnup 'sport = :1351'", on macOS "lsof -nP -i :1351", and on Windows "netstat -ano | findstr :1351" to see the local process. From another machine, "nmap -p 1351 <host>" shows whether it is reachable.

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