CyberHunter
Local dataset, no network
// Other services

Port 5730: Steltor's calendar access

Port 5730 is assigned by IANA to unieng (Steltor's calendar access).

5730

How unieng works

Other services
client:5730uniengresponse client:5730uniengresponse

The client sends a request to port 5730 and the unieng 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 5730 dangerous?

We have no specific security note for port 5730. 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 5730

ServicePortTransportDescriptionReferenceUpdated
unieng 5730 TCP, UDP Steltor's calendar access - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 5730, and is it reachable?

Linux

sudo ss -ltnup 'sport = :5730'      # process listening on 5730
sudo lsof -nP -i :5730

macOS

sudo lsof -nP -i :5730

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5730 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 5730
netstat -ano | findstr :5730

From another machine

nmap -p 5730 -sV <host>
sudo nmap -sU -p 5730 <host>
nc -zv <host> 5730

Block it in the firewall

sudo ufw deny 5730/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 5730" -Direction Inbound -LocalPort 5730 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 5730 used for?

Port 5730 is assigned by IANA to unieng (Steltor's calendar access).

Is port 5730 TCP or UDP?

Port 5730 is registered for TCP and UDP.

Is it safe to open port 5730?

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 5730 is open?

On Linux run "ss -ltnup 'sport = :5730'", on macOS "lsof -nP -i :5730", and on Windows "netstat -ano | findstr :5730" to see the local process. From another machine, "nmap -p 5730 <host>" shows whether it is reachable.

05 Related
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