packet-filter

NPF: packet filter with stateful inspection, NAT, IP sets, etc.

The first and only publicly available Minecraft XDP Filter, protecting your server from layer 7 DDoS attacks

UTM Firewall on OpenBSD

Software networking with isolation for Tart

A simple packet filtering firewall for Linux

PF Firewall on OpenBSD

A network security policy compiler. Netspoc is targeted at environments with a large number of firewalls and admins. Firewall rules are derived from a single rule set. Supported are Cisco IOS, ASA, Palo-Alto, VMware NSX gateway firewalls and IPTables.

PF (Packet Filter)

This program allow you to extract some features from pcap files.

Add-ons for the OpenBSD web server

🐡 ⚙️ Personal config files, handbook and more.

Packet Filter Rule Editor for OpenBSD/pf

Distributed XDP/eBPF firewall with wire-speed packet filtering and a central management controller.

Advanced library for packet processing. Includes NetVM, NetPDL, and NetPFL.

macOS / Windows 10 Telemetry filter

OpenBSD daemon primarily used to build and maintain dynamic firewall blocklists

Packet filter written in Rust

Experimental NFQUEUE-based TCP connection pacing daemon with pluggable cooldown algorithms.

Windows 硬件级软路由与透明代理网关，基于 C++ 与 WinPkFilter NDIS 驱动，支持透明 TCP/UDP 劫持、HTTP 代理转发（HTTP CONNECT 隧道）、GeoIP/GeoSite 智能分流与自带 WiFi 热点托管。

A small Python script used to help network administrators to generate PF (Packet Filter) rules to block a bunch of hosts