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// Other services

Port 8470: Cisco Address Validation Protocol

Port 8470 is assigned by IANA to cisco-avp (Cisco Address Validation Protocol).

8470

How cisco-avp works

Other services
client:8470cisco-avpresponse client:8470cisco-avpresponse

The client sends a request to port 8470 and the cisco-avp service answers.

Transport
TCP
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 8470 dangerous?

We have no specific security note for port 8470. 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 8470

ServicePortTransportDescriptionReferenceUpdated
cisco-avp 8470 TCP Cisco Address Validation Protocol - 2009-02-13
-8470-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 8470, and is it reachable?

Linux

sudo ss -ltnup 'sport = :8470'      # process listening on 8470
sudo lsof -nP -i :8470

macOS

sudo lsof -nP -i :8470

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 8470 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 8470
netstat -ano | findstr :8470

From another machine

nmap -p 8470 -sV <host>
nc -zv <host> 8470

Block it in the firewall

sudo ufw deny 8470/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 8470" -Direction Inbound -LocalPort 8470 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 8470 used for?

Port 8470 is assigned by IANA to cisco-avp (Cisco Address Validation Protocol).

Is port 8470 TCP or UDP?

Port 8470 is registered for TCP.

Is it safe to open port 8470?

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 8470 is open?

On Linux run "ss -ltnup 'sport = :8470'", on macOS "lsof -nP -i :8470", and on Windows "netstat -ano | findstr :8470" to see the local process. From another machine, "nmap -p 8470 <host>" shows whether it is reachable.

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