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// DevOps, cloud & containers

Port 4790: Generic Protocol Extension for Virtual eXtensible Local Area Network (VXLAN)

Port 4790 is assigned by IANA to vxlan-gpe (Generic Protocol Extension for Virtual eXtensible Local Area Network (VXLAN)).

4790

How vxlan-gpe works

DevOps, cloud & containers
adminhostvxlan-gpe adminhostvxlan-gpe

Commands sent to port 4790 create and control containers or cluster resources on the host.

Transport
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
DevOps, cloud & containers
01 Security

Is port 4790 dangerous?

We have no specific security note for port 4790. 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 4790

ServicePortTransportDescriptionReferenceUpdated
vxlan-gpe 4790 UDP Generic Protocol Extension for Virtual eXtensible Local Area Network (VXLAN) - 2014-08-26
-4790-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 4790, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4790'      # process listening on 4790
sudo lsof -nP -i :4790

macOS

sudo lsof -nP -i :4790

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4790 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4790
netstat -ano | findstr :4790

From another machine

nmap -p 4790 -sV <host>
sudo nmap -sU -p 4790 <host>
nc -zv <host> 4790

Block it in the firewall

sudo ufw deny 4790/udp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4790" -Direction Inbound -LocalPort 4790 -Protocol UDP -Action Block  # Windows
04 FAQ
What is port 4790 used for?

Port 4790 is assigned by IANA to vxlan-gpe (Generic Protocol Extension for Virtual eXtensible Local Area Network (VXLAN)).

Is port 4790 TCP or UDP?

Port 4790 is registered for UDP.

Is it safe to open port 4790?

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 4790 is open?

On Linux run "ss -ltnup 'sport = :4790'", on macOS "lsof -nP -i :4790", and on Windows "netstat -ano | findstr :4790" to see the local process. From another machine, "nmap -p 4790 <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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