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Port 1753 (predatar-comms)

IANA assigns port 1753 to predatar-comms: Predatar Comms Service.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference
predatar-comms TCP Predatar Comms Service Silverstring Ltd -

Registry dates for this port: registered 2011-09-15.

Check what is listening on port 1753

Linux: is anything listening on TCP 1753?
sudo ss -tlnp 'sport = :1753'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1753
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1753 '
Windows (Command Prompt)
netstat -ano | findstr :1753
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1753 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1753
From Windows
Test-NetConnection HOST -Port 1753

Block port 1753 in the firewall

ufw
sudo ufw deny 1753/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1753 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1753 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1753' -Direction Inbound -Protocol TCP -LocalPort 1753 -Action Block

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