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// Other services

Port 376: Amiga Envoy Network Inquiry Protocol

Port 376 is assigned by IANA to nip (Amiga Envoy Network Inquiry Protocol).

376

How nip works

Other services
client:376nipresponse client:376nipresponse

The client sends a request to port 376 and the nip 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 376 dangerous?

We have no specific security note for port 376. 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 376

ServicePortTransportDescriptionReferenceUpdated
nip 376 TCP, UDP Amiga Envoy Network Inquiry Protocol - 2020-10-02

// source: IANA service name and port number registry

03 Check it

Which program uses port 376, and is it reachable?

Linux

sudo ss -ltnup 'sport = :376'      # process listening on 376
sudo lsof -nP -i :376

macOS

sudo lsof -nP -i :376

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 376 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 376
netstat -ano | findstr :376

From another machine

nmap -p 376 -sV <host>
sudo nmap -sU -p 376 <host>
nc -zv <host> 376

Block it in the firewall

sudo ufw deny 376/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 376" -Direction Inbound -LocalPort 376 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 376 used for?

Port 376 is assigned by IANA to nip (Amiga Envoy Network Inquiry Protocol).

Is port 376 TCP or UDP?

Port 376 is registered for TCP and UDP.

Is it safe to open port 376?

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 376 is open?

On Linux run "ss -ltnup 'sport = :376'", on macOS "lsof -nP -i :376", and on Windows "netstat -ano | findstr :376" to see the local process. From another machine, "nmap -p 376 <host>" shows whether it is reachable.

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