HTTPfy

Port 5243 (xycstatus)

IANA assigns port 5243 to xycstatus: xyClient Status API and rendevous point.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference
xycstatus TCP xyClient Status API and rendevous point Xycare Ltd -

Registry dates for this port: registered 2022-06-06.

Check what is listening on port 5243

Linux: is anything listening on TCP 5243?
sudo ss -tlnp 'sport = :5243'
Linux / macOS: which process owns the port
sudo lsof -nP -i :5243
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':5243 '
Windows (Command Prompt)
netstat -ano | findstr :5243
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 5243 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 5243
From Windows
Test-NetConnection HOST -Port 5243

Block port 5243 in the firewall

ufw
sudo ufw deny 5243/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 5243 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 5243 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 5243' -Direction Inbound -Protocol TCP -LocalPort 5243 -Action Block

Related ports

5237mnet-discovery5242attune5245downtools, downtools-disc5246capwap-control

All port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.