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// Other services

Port 486: avian

Port 486 is assigned by IANA to avian (avian).

486

How avian works

Other services
client:486avianresponse client:486avianresponse

The client sends a request to port 486 and the avian 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
Well-known (0-1023)
Category
Other services
01 Security

Is port 486 dangerous?

We have no specific security note for port 486. 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 486

ServicePortTransportDescriptionReferenceUpdated
avian 486 TCP, UDP avian - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 486, and is it reachable?

Linux

sudo ss -ltnup 'sport = :486'      # process listening on 486
sudo lsof -nP -i :486

macOS

sudo lsof -nP -i :486

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 486 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 486
netstat -ano | findstr :486

From another machine

nmap -p 486 -sV <host>
sudo nmap -sU -p 486 <host>
nc -zv <host> 486

Block it in the firewall

sudo ufw deny 486/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 486" -Direction Inbound -LocalPort 486 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 486 used for?

Port 486 is assigned by IANA to avian (avian).

Is port 486 TCP or UDP?

Port 486 is registered for TCP and UDP.

Is it safe to open port 486?

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 486 is open?

On Linux run "ss -ltnup 'sport = :486'", on macOS "lsof -nP -i :486", and on Windows "netstat -ano | findstr :486" to see the local process. From another machine, "nmap -p 486 <host>" shows whether it is reachable.

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