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// Other services

Port 20057: AvesTerra Hypergraph Transfer Protocol (HGTP)

Port 20057 is assigned by IANA to avesterra (AvesTerra Hypergraph Transfer Protocol (HGTP)).

20057

How avesterra works

Other services
client:20057avesterraresponse client:20057avesterraresponse

The client sends a request to port 20057 and the avesterra 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 20057 dangerous?

We have no specific security note for port 20057. 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 20057

ServicePortTransportDescriptionReferenceUpdated
avesterra 20057 TCP AvesTerra Hypergraph Transfer Protocol (HGTP) - 2016-06-06
-20057-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 20057, and is it reachable?

Linux

sudo ss -ltnup 'sport = :20057'      # process listening on 20057
sudo lsof -nP -i :20057

macOS

sudo lsof -nP -i :20057

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 20057 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 20057
netstat -ano | findstr :20057

From another machine

nmap -p 20057 -sV <host>
nc -zv <host> 20057

Block it in the firewall

sudo ufw deny 20057/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 20057" -Direction Inbound -LocalPort 20057 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 20057 used for?

Port 20057 is assigned by IANA to avesterra (AvesTerra Hypergraph Transfer Protocol (HGTP)).

Is port 20057 TCP or UDP?

Port 20057 is registered for TCP.

Is it safe to open port 20057?

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 20057 is open?

On Linux run "ss -ltnup 'sport = :20057'", on macOS "lsof -nP -i :20057", and on Windows "netstat -ano | findstr :20057" to see the local process. From another machine, "nmap -p 20057 <host>" shows whether it is reachable.

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