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// Other services

Port 44553: REALbasic Remote Debug

Port 44553 is assigned by IANA to rbr-debug (REALbasic Remote Debug).

44553

How rbr-debug works

Other services
client:44553rbr-debugresponse client:44553rbr-debugresponse

The client sends a request to port 44553 and the rbr-debug 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 44553 dangerous?

We have no specific security note for port 44553. 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 44553

ServicePortTransportDescriptionReferenceUpdated
rbr-debug 44553 TCP, UDP REALbasic Remote Debug - 2004-11

// source: IANA service name and port number registry

03 Check it

Which program uses port 44553, and is it reachable?

Linux

sudo ss -ltnup 'sport = :44553'      # process listening on 44553
sudo lsof -nP -i :44553

macOS

sudo lsof -nP -i :44553

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 44553 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 44553
netstat -ano | findstr :44553

From another machine

nmap -p 44553 -sV <host>
sudo nmap -sU -p 44553 <host>
nc -zv <host> 44553

Block it in the firewall

sudo ufw deny 44553/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 44553" -Direction Inbound -LocalPort 44553 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 44553 used for?

Port 44553 is assigned by IANA to rbr-debug (REALbasic Remote Debug).

Is port 44553 TCP or UDP?

Port 44553 is registered for TCP and UDP.

Is it safe to open port 44553?

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 44553 is open?

On Linux run "ss -ltnup 'sport = :44553'", on macOS "lsof -nP -i :44553", and on Windows "netstat -ano | findstr :44553" to see the local process. From another machine, "nmap -p 44553 <host>" shows whether it is reachable.

05 Related
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