CyberHunter
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// Other services

Port 8472: Overlay Transport Virtualization (OTV)

Port 8472 is assigned by IANA to otv (Overlay Transport Virtualization (OTV)).

8472

How otv works

Other services
client:8472otvresponse client:8472otvresponse

The client sends a request to port 8472 and the otv service answers.

Transport
TCP · 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
Other services
01 Security

Is port 8472 dangerous?

We have no specific security note for port 8472. Its risk depends on the program actually listening on it. General advice for other services services:

  • Close the port if nothing on the host needs it.
  • Identify the process that listens on it (commands below) before opening it in a firewall.
  • Expose a service only to the networks that use it.
02 Registry

IANA registry entries for port 8472

ServicePortTransportDescriptionReferenceUpdated
otv 8472 TCP, UDP Overlay Transport Virtualization (OTV) - 2008-01-07

// source: IANA service name and port number registry

03 Check it

Which program uses port 8472, and is it reachable?

Linux

sudo ss -ltnup 'sport = :8472'      # process listening on 8472
sudo lsof -nP -i :8472

macOS

sudo lsof -nP -i :8472

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 8472 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 8472
netstat -ano | findstr :8472

From another machine

nmap -p 8472 -sV <host>
sudo nmap -sU -p 8472 <host>
nc -zv <host> 8472

Block it in the firewall

sudo ufw deny 8472/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 8472" -Direction Inbound -LocalPort 8472 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 8472 used for?

Port 8472 is assigned by IANA to otv (Overlay Transport Virtualization (OTV)).

Is port 8472 TCP or UDP?

Port 8472 is registered for TCP and UDP.

Is it safe to open port 8472?

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. Close the port if nothing on the host needs it.

How do I check if port 8472 is open?

On Linux run "ss -ltnup 'sport = :8472'", on macOS "lsof -nP -i :8472", and on Windows "netstat -ano | findstr :8472" to see the local process. From another machine, "nmap -p 8472 <host>" shows whether it is reachable.

05 Related
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