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Port 5744 (watchdoc)

IANA assigns port 5744 to watchdoc: Watchdoc Server.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
watchdoc TCP Watchdoc Server Christophe Chevalier -
watchdoc UDP Watchdoc Server Christophe Chevalier -

Registry dates for this port: registered 2004-11.

Check what is listening on port 5744

Linux: is anything listening on TCP 5744?
sudo ss -tlnp 'sport = :5744'
Linux: UDP 5744
sudo ss -ulnp 'sport = :5744'
Linux / macOS: which process owns the port
sudo lsof -nP -i :5744
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':5744 '
Windows (Command Prompt)
netstat -ano | findstr :5744
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 5744 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 5744
From Windows
Test-NetConnection HOST -Port 5744
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 5744

Block port 5744 in the firewall

ufw
sudo ufw deny 5744/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 5744 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 5744 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 5744' -Direction Inbound -Protocol TCP -LocalPort 5744 -Action Block
ufw
sudo ufw deny 5744/udp
iptables
sudo iptables -A INPUT -p udp --dport 5744 -j DROP
nftables
sudo nft add rule inet filter input udp dport 5744 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 5744' -Direction Inbound -Protocol UDP -LocalPort 5744 -Action Block

Related ports

5742ida-discover25743watchdoc-pod5745fcopy-server5746fcopys-server

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