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// Other services

Port 32811: Real Estate Transport Protocol

Port 32811 is assigned by IANA to retp (Real Estate Transport Protocol).

32811

How retp works

Other services
client:32811retpresponse client:32811retpresponse

The client sends a request to port 32811 and the retp 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)
01 Security

Is port 32811 dangerous?

We have no specific security note for port 32811. 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 32811

ServicePortTransportDescriptionReferenceUpdated
retp 32811 TCP Real Estate Transport Protocol - 2010-10-11
-32811-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 32811, and is it reachable?

Linux

sudo ss -ltnup 'sport = :32811'      # process listening on 32811
sudo lsof -nP -i :32811

macOS

sudo lsof -nP -i :32811

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 32811 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 32811
netstat -ano | findstr :32811

From another machine

nmap -p 32811 -sV <host>
nc -zv <host> 32811

Block it in the firewall

sudo ufw deny 32811/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 32811" -Direction Inbound -LocalPort 32811 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 32811 used for?

Port 32811 is assigned by IANA to retp (Real Estate Transport Protocol).

Is port 32811 TCP or UDP?

Port 32811 is registered for TCP.

Is it safe to open port 32811?

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 32811 is open?

On Linux run "ss -ltnup 'sport = :32811'", on macOS "lsof -nP -i :32811", and on Windows "netstat -ano | findstr :32811" to see the local process. From another machine, "nmap -p 32811 <host>" shows whether it is reachable.

05 Related

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