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// Other services

Port 3180: Millicent Broker Server

Port 3180 is assigned by IANA to mc-brk-srv (Millicent Broker Server).

3180

How mc-brk-srv works

Other services
client:3180mc-brk-srvresponse client:3180mc-brk-srvresponse

The client sends a request to port 3180 and the mc-brk-srv 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 3180 dangerous?

We have no specific security note for port 3180. 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 3180

ServicePortTransportDescriptionReferenceUpdated
mc-brk-srv 3180 TCP, UDP Millicent Broker Server - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 3180, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3180'      # process listening on 3180
sudo lsof -nP -i :3180

macOS

sudo lsof -nP -i :3180

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3180 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3180
netstat -ano | findstr :3180

From another machine

nmap -p 3180 -sV <host>
sudo nmap -sU -p 3180 <host>
nc -zv <host> 3180

Block it in the firewall

sudo ufw deny 3180/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3180" -Direction Inbound -LocalPort 3180 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3180 used for?

Port 3180 is assigned by IANA to mc-brk-srv (Millicent Broker Server).

Is port 3180 TCP or UDP?

Port 3180 is registered for TCP and UDP.

Is it safe to open port 3180?

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 3180 is open?

On Linux run "ss -ltnup 'sport = :3180'", on macOS "lsof -nP -i :3180", and on Windows "netstat -ano | findstr :3180" to see the local process. From another machine, "nmap -p 3180 <host>" shows whether it is reachable.

05 Related
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