CyberHunter
LinkedIn profile - Bastien Cordier Email: contact@bastiencordier.pro
// DevOps, cloud & containers

Port 677: Virtual Presence Protocol

Port 677 is assigned by IANA to vpp (Virtual Presence Protocol).

677

How vpp works

DevOps, cloud & containers
adminhostvpp adminhostvpp

Commands sent to port 677 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 677 dangerous?

We have no specific security note for port 677. 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 677

ServicePortTransportDescriptionReferenceUpdated
vpp 677 TCP, UDP Virtual Presence Protocol - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 677, and is it reachable?

Linux

sudo ss -ltnup 'sport = :677'      # process listening on 677
sudo lsof -nP -i :677

macOS

sudo lsof -nP -i :677

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 677 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 677
netstat -ano | findstr :677

From another machine

nmap -p 677 -sV <host>
sudo nmap -sU -p 677 <host>
nc -zv <host> 677

Block it in the firewall

sudo ufw deny 677/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 677" -Direction Inbound -LocalPort 677 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 677 used for?

Port 677 is assigned by IANA to vpp (Virtual Presence Protocol).

Is port 677 TCP or UDP?

Port 677 is registered for TCP and UDP.

Is it safe to open port 677?

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 677 is open?

On Linux run "ss -ltnup 'sport = :677'", on macOS "lsof -nP -i :677", and on Windows "netstat -ano | findstr :677" to see the local process. From another machine, "nmap -p 677 <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

Latest vulnerability news

All news