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// Other services

Port 2752: RSISYS ACCESS

Port 2752 is assigned by IANA to rsisysaccess (RSISYS ACCESS).

2752

How rsisysaccess works

Other services
client:2752rsisysaccessresponse client:2752rsisysaccessresponse

The client sends a request to port 2752 and the rsisysaccess 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 2752 dangerous?

We have no specific security note for port 2752. 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 2752

ServicePortTransportDescriptionReferenceUpdated
rsisysaccess 2752 TCP, UDP RSISYS ACCESS - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2752, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2752'      # process listening on 2752
sudo lsof -nP -i :2752

macOS

sudo lsof -nP -i :2752

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2752 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2752
netstat -ano | findstr :2752

From another machine

nmap -p 2752 -sV <host>
sudo nmap -sU -p 2752 <host>
nc -zv <host> 2752

Block it in the firewall

sudo ufw deny 2752/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2752" -Direction Inbound -LocalPort 2752 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2752 used for?

Port 2752 is assigned by IANA to rsisysaccess (RSISYS ACCESS).

Is port 2752 TCP or UDP?

Port 2752 is registered for TCP and UDP.

Is it safe to open port 2752?

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 2752 is open?

On Linux run "ss -ltnup 'sport = :2752'", on macOS "lsof -nP -i :2752", and on Windows "netstat -ano | findstr :2752" to see the local process. From another machine, "nmap -p 2752 <host>" shows whether it is reachable.

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