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// Other services

Port 267: Tobit David Service Layer

Port 267 is assigned by IANA to td-service (Tobit David Service Layer).

267

How td-service works

Other services
client:267td-serviceresponse client:267td-serviceresponse

The client sends a request to port 267 and the td-service 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 267 dangerous?

We have no specific security note for port 267. 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 267

ServicePortTransportDescriptionReferenceUpdated
td-service 267 TCP, UDP Tobit David Service Layer - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 267, and is it reachable?

Linux

sudo ss -ltnup 'sport = :267'      # process listening on 267
sudo lsof -nP -i :267

macOS

sudo lsof -nP -i :267

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 267 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 267
netstat -ano | findstr :267

From another machine

nmap -p 267 -sV <host>
sudo nmap -sU -p 267 <host>
nc -zv <host> 267

Block it in the firewall

sudo ufw deny 267/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 267" -Direction Inbound -LocalPort 267 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 267 used for?

Port 267 is assigned by IANA to td-service (Tobit David Service Layer).

Is port 267 TCP or UDP?

Port 267 is registered for TCP and UDP.

Is it safe to open port 267?

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 267 is open?

On Linux run "ss -ltnup 'sport = :267'", on macOS "lsof -nP -i :267", and on Windows "netstat -ano | findstr :267" to see the local process. From another machine, "nmap -p 267 <host>" shows whether it is reachable.

05 Related
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