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// Other services

Port 176: GENRAD-MUX

Port 176 is assigned by IANA to genrad-mux (GENRAD-MUX).

176

How genrad-mux works

Other services
client:176genrad-muxresponse client:176genrad-muxresponse

The client sends a request to port 176 and the genrad-mux 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 176 dangerous?

We have no specific security note for port 176. 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 176

ServicePortTransportDescriptionReferenceUpdated
genrad-mux 176 TCP, UDP GENRAD-MUX - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 176, and is it reachable?

Linux

sudo ss -ltnup 'sport = :176'      # process listening on 176
sudo lsof -nP -i :176

macOS

sudo lsof -nP -i :176

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 176 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 176
netstat -ano | findstr :176

From another machine

nmap -p 176 -sV <host>
sudo nmap -sU -p 176 <host>
nc -zv <host> 176

Block it in the firewall

sudo ufw deny 176/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 176" -Direction Inbound -LocalPort 176 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 176 used for?

Port 176 is assigned by IANA to genrad-mux (GENRAD-MUX).

Is port 176 TCP or UDP?

Port 176 is registered for TCP and UDP.

Is it safe to open port 176?

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 176 is open?

On Linux run "ss -ltnup 'sport = :176'", on macOS "lsof -nP -i :176", and on Windows "netstat -ano | findstr :176" to see the local process. From another machine, "nmap -p 176 <host>" shows whether it is reachable.

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