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// Other services

Port 3132: Microsoft Business Rule Engine Update Service

Port 3132 is assigned by IANA to ms-rule-engine (Microsoft Business Rule Engine Update Service).

3132

How ms-rule-engine works

Other services
client:3132ms-rule-engineresponse client:3132ms-rule-engineresponse

The client sends a request to port 3132 and the ms-rule-engine 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 3132 dangerous?

We have no specific security note for port 3132. 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 3132

ServicePortTransportDescriptionReferenceUpdated
ms-rule-engine 3132 TCP, UDP Microsoft Business Rule Engine Update Service - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 3132, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3132'      # process listening on 3132
sudo lsof -nP -i :3132

macOS

sudo lsof -nP -i :3132

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3132 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3132
netstat -ano | findstr :3132

From another machine

nmap -p 3132 -sV <host>
sudo nmap -sU -p 3132 <host>
nc -zv <host> 3132

Block it in the firewall

sudo ufw deny 3132/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3132" -Direction Inbound -LocalPort 3132 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3132 used for?

Port 3132 is assigned by IANA to ms-rule-engine (Microsoft Business Rule Engine Update Service).

Is port 3132 TCP or UDP?

Port 3132 is registered for TCP and UDP.

Is it safe to open port 3132?

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 3132 is open?

On Linux run "ss -ltnup 'sport = :3132'", on macOS "lsof -nP -i :3132", and on Windows "netstat -ano | findstr :3132" to see the local process. From another machine, "nmap -p 3132 <host>" shows whether it is reachable.

05 Related
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