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// DevOps, cloud & containers

Port 694: ha-cluster

Port 694 is assigned by IANA to ha-cluster (ha-cluster).

694

How ha-cluster works

DevOps, cloud & containers
adminhostha-cluster adminhostha-cluster

Commands sent to port 694 create and control containers or cluster resources on the host.

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
DevOps, cloud & containers
01 Security

Is port 694 dangerous?

We have no specific security note for port 694. 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 694

ServicePortTransportDescriptionReferenceUpdated
ha-cluster 694 TCP, UDP ha-cluster - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 694, and is it reachable?

Linux

sudo ss -ltnup 'sport = :694'      # process listening on 694
sudo lsof -nP -i :694

macOS

sudo lsof -nP -i :694

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 694 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 694
netstat -ano | findstr :694

From another machine

nmap -p 694 -sV <host>
sudo nmap -sU -p 694 <host>
nc -zv <host> 694

Block it in the firewall

sudo ufw deny 694/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 694" -Direction Inbound -LocalPort 694 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 694 used for?

Port 694 is assigned by IANA to ha-cluster (ha-cluster).

Is port 694 TCP or UDP?

Port 694 is registered for TCP and UDP.

Is it safe to open port 694?

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 694 is open?

On Linux run "ss -ltnup 'sport = :694'", on macOS "lsof -nP -i :694", and on Windows "netstat -ano | findstr :694" to see the local process. From another machine, "nmap -p 694 <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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