Home Network & IoT
UFW / firewalld / Windows Firewall
Host firewalls to restrict inbound services on PCs and servers.
Authorized testing only. Practice on systems you own, isolated labs, or targets with written permission. Unauthorized access is illegal.
When
Hardening every always-on machine after you inventory listeners.
How
Default deny inbound; allow only needed ports; log drops.
Why
Network firewalls are not enough — hosts need their own policy.
Commands & usage
sudo ufw default deny incoming
sudo ufw allow OpenSSH
sudo ufw enable
sudo ufw status verbose
Commands are educational examples. Adapt hosts, paths, and rates to your authorized scope.
Tags
Related in Home Network & IoT
Zenmap
Official Nmap GUI for visual topology and profile-based scanning.
Fing
Consumer-friendly network scanner for device inventory and internet checks.
Advanced IP Scanner
Fast Windows LAN scanner with remote RDP/HTTP shortcuts for found hosts.
nbtscan
Scans for NetBIOS name information on Windows/Samba hosts.
avahi-browse / dns-sd (mDNS)
Discovers mDNS/Bonjour services (Chromecast, printers, HomeKit, NAS).
ss / netstat / lsof
Show listening ports and connections on your own machines.