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// DevOps, cloud & containers

Port 7728: Open-Source Virtual Reality

Port 7728 is assigned by IANA to osvr (Open-Source Virtual Reality).

7728

How osvr works

DevOps, cloud & containers
adminhostosvr adminhostosvr

Commands sent to port 7728 create and control containers or cluster resources on the host.

Transport
TCP · UDP · SCTP
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 7728 dangerous?

We have no specific security note for port 7728. 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 7728

ServicePortTransportDescriptionReferenceUpdated
osvr 7728 TCP, UDP, SCTP Open-Source Virtual Reality - 2015-07-14

// source: IANA service name and port number registry

03 Check it

Which program uses port 7728, and is it reachable?

Linux

sudo ss -ltnup 'sport = :7728'      # process listening on 7728
sudo lsof -nP -i :7728

macOS

sudo lsof -nP -i :7728

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 7728 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 7728
netstat -ano | findstr :7728

From another machine

nmap -p 7728 -sV <host>
sudo nmap -sU -p 7728 <host>
nc -zv <host> 7728

Block it in the firewall

sudo ufw deny 7728/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 7728" -Direction Inbound -LocalPort 7728 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 7728 used for?

Port 7728 is assigned by IANA to osvr (Open-Source Virtual Reality).

Is port 7728 TCP or UDP?

Port 7728 is registered for TCP and UDP and SCTP.

Is it safe to open port 7728?

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 7728 is open?

On Linux run "ss -ltnup 'sport = :7728'", on macOS "lsof -nP -i :7728", and on Windows "netstat -ano | findstr :7728" to see the local process. From another machine, "nmap -p 7728 <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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