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// Other services

Port 2167: Raw Async Serial Link

Port 2167 is assigned by IANA to raw-serial (Raw Async Serial Link).

2167

How raw-serial works

Other services
client:2167raw-serialresponse client:2167raw-serialresponse

The client sends a request to port 2167 and the raw-serial 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 2167 dangerous?

We have no specific security note for port 2167. 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 2167

ServicePortTransportDescriptionReferenceUpdated
raw-serial 2167 TCP, UDP Raw Async Serial Link - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2167, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2167'      # process listening on 2167
sudo lsof -nP -i :2167

macOS

sudo lsof -nP -i :2167

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2167 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2167
netstat -ano | findstr :2167

From another machine

nmap -p 2167 -sV <host>
sudo nmap -sU -p 2167 <host>
nc -zv <host> 2167

Block it in the firewall

sudo ufw deny 2167/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2167" -Direction Inbound -LocalPort 2167 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2167 used for?

Port 2167 is assigned by IANA to raw-serial (Raw Async Serial Link).

Is port 2167 TCP or UDP?

Port 2167 is registered for TCP and UDP.

Is it safe to open port 2167?

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 2167 is open?

On Linux run "ss -ltnup 'sport = :2167'", on macOS "lsof -nP -i :2167", and on Windows "netstat -ano | findstr :2167" to see the local process. From another machine, "nmap -p 2167 <host>" shows whether it is reachable.

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