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// Other services

Port 5243: xyClient Status API and rendevous point

Port 5243 is assigned by IANA to xycstatus (xyClient Status API and rendevous point).

5243

How xycstatus works

Other services
client:5243xycstatusresponse client:5243xycstatusresponse

The client sends a request to port 5243 and the xycstatus 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)
Category
Other services
01 Security

Is port 5243 dangerous?

We have no specific security note for port 5243. 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 5243

ServicePortTransportDescriptionReferenceUpdated
xycstatus 5243 TCP xyClient Status API and rendevous point - 2022-06-06
-5243-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 5243, and is it reachable?

Linux

sudo ss -ltnup 'sport = :5243'      # process listening on 5243
sudo lsof -nP -i :5243

macOS

sudo lsof -nP -i :5243

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5243 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 5243
netstat -ano | findstr :5243

From another machine

nmap -p 5243 -sV <host>
nc -zv <host> 5243

Block it in the firewall

sudo ufw deny 5243/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 5243" -Direction Inbound -LocalPort 5243 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 5243 used for?

Port 5243 is assigned by IANA to xycstatus (xyClient Status API and rendevous point).

Is port 5243 TCP or UDP?

Port 5243 is registered for TCP.

Is it safe to open port 5243?

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 5243 is open?

On Linux run "ss -ltnup 'sport = :5243'", on macOS "lsof -nP -i :5243", and on Windows "netstat -ano | findstr :5243" to see the local process. From another machine, "nmap -p 5243 <host>" shows whether it is reachable.

05 Related
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