safing/portmaster

network firewall and privacy tool for monitoring and blocking app connections

self-hosted tool for real-time port monitoring and discovery
Mostafa-Wahied/portracker
Android firewall app for blocking internet access per app
ukanth/afwall
Linux app firewall that lets you control and monitor outgoing connections per app
evilsocket/opensnitch
A netstat alternative for socket and port monitoring
theopfr/somo
open-source API to check port availability on hosts or IPs
dsgnr/portchecker.io
A DIY version of the Great Firewall
apernet/OpenGFW
lightweight open-source web app firewall with local data encryption and private deployment
samwafgo/SamWaf
Open-source web application firewall
chaitin/SafeLine
Network pings, network tools, interface management, local device discovery
sn4k3/NetSonar
middleware for IP control, rate limiting, and security headers in FastAPI
rennf93/fastapi-guard