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// Other services

Port 8376: Cruise ENUM

Port 8376 is assigned by IANA to cruise-enum (Cruise ENUM).

8376

How cruise-enum works

Other services
client:8376cruise-enumresponse client:8376cruise-enumresponse

The client sends a request to port 8376 and the cruise-enum 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 8376 dangerous?

We have no specific security note for port 8376. 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 8376

ServicePortTransportDescriptionReferenceUpdated
cruise-enum 8376 TCP, UDP Cruise ENUM - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 8376, and is it reachable?

Linux

sudo ss -ltnup 'sport = :8376'      # process listening on 8376
sudo lsof -nP -i :8376

macOS

sudo lsof -nP -i :8376

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 8376 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 8376
netstat -ano | findstr :8376

From another machine

nmap -p 8376 -sV <host>
sudo nmap -sU -p 8376 <host>
nc -zv <host> 8376

Block it in the firewall

sudo ufw deny 8376/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 8376" -Direction Inbound -LocalPort 8376 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 8376 used for?

Port 8376 is assigned by IANA to cruise-enum (Cruise ENUM).

Is port 8376 TCP or UDP?

Port 8376 is registered for TCP and UDP.

Is it safe to open port 8376?

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 8376 is open?

On Linux run "ss -ltnup 'sport = :8376'", on macOS "lsof -nP -i :8376", and on Windows "netstat -ano | findstr :8376" to see the local process. From another machine, "nmap -p 8376 <host>" shows whether it is reachable.

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