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// DevOps, cloud & containers

Port 8140: The Puppet master service

Port 8140 is assigned by IANA to puppet (The Puppet master service).

8140

How puppet works

DevOps, cloud & containers
adminhostpuppet adminhostpuppet

Commands sent to port 8140 create and control containers or cluster resources on the host.

Transport
TCP
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
DevOps, cloud & containers
01 Security

Is port 8140 dangerous?

We have no specific security note for port 8140. Its risk depends on the program actually listening on it. General advice for devops, cloud & containers services:

  • Container and orchestration APIs give full control of hosts: require mutual TLS and RBAC.
  • Never expose them to the Internet.
  • Rotate tokens and certificates and audit who has access.
02 Registry

IANA registry entries for port 8140

ServicePortTransportDescriptionReferenceUpdated
puppet 8140 TCP The Puppet master service - 2014-09-18
-8140-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 8140, and is it reachable?

Linux

sudo ss -ltnup 'sport = :8140'      # process listening on 8140
sudo lsof -nP -i :8140

macOS

sudo lsof -nP -i :8140

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 8140 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 8140
netstat -ano | findstr :8140

From another machine

nmap -p 8140 -sV <host>
nc -zv <host> 8140

Block it in the firewall

sudo ufw deny 8140/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 8140" -Direction Inbound -LocalPort 8140 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 8140 used for?

Port 8140 is assigned by IANA to puppet (The Puppet master service).

Is port 8140 TCP or UDP?

Port 8140 is registered for TCP.

Is it safe to open port 8140?

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. Container and orchestration APIs give full control of hosts: require mutual TLS and RBAC.

How do I check if port 8140 is open?

On Linux run "ss -ltnup 'sport = :8140'", on macOS "lsof -nP -i :8140", and on Windows "netstat -ano | findstr :8140" to see the local process. From another machine, "nmap -p 8140 <host>" shows whether it is reachable.

05 Related
:2375 Docker API (HTTP) tcp · critical risk :2376 Docker API (TLS) tcp · high risk :6443 Kubernetes API tcp · udp · high risk :10250 Kubelet API tcp · critical risk :2379 etcd tcp · critical risk :8500 Consul tcp · udp · high risk :4505 SaltStack tcp · critical risk :9000 PHP-FPM / SonarQube / Portainer tcp · udp · high risk

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