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// Other services

Port 5750: Bladelogic Agent Service

Port 5750 is assigned by IANA to rscd (Bladelogic Agent Service).

5750

How rscd works

Other services
client:5750rscdresponse client:5750rscdresponse

The client sends a request to port 5750 and the rscd 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 5750 dangerous?

We have no specific security note for port 5750. 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 5750

ServicePortTransportDescriptionReferenceUpdated
rscd 5750 TCP, UDP Bladelogic Agent Service - 2008-10-24

// source: IANA service name and port number registry

03 Check it

Which program uses port 5750, and is it reachable?

Linux

sudo ss -ltnup 'sport = :5750'      # process listening on 5750
sudo lsof -nP -i :5750

macOS

sudo lsof -nP -i :5750

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5750 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 5750
netstat -ano | findstr :5750

From another machine

nmap -p 5750 -sV <host>
sudo nmap -sU -p 5750 <host>
nc -zv <host> 5750

Block it in the firewall

sudo ufw deny 5750/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 5750" -Direction Inbound -LocalPort 5750 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 5750 used for?

Port 5750 is assigned by IANA to rscd (Bladelogic Agent Service).

Is port 5750 TCP or UDP?

Port 5750 is registered for TCP and UDP.

Is it safe to open port 5750?

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 5750 is open?

On Linux run "ss -ltnup 'sport = :5750'", on macOS "lsof -nP -i :5750", and on Windows "netstat -ano | findstr :5750" to see the local process. From another machine, "nmap -p 5750 <host>" shows whether it is reachable.

05 Related
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