The tables are made up of a set of predefined chains, and the chains contain rules which are traversed in order. The code for filtering IP packets is already built into the kernel and is organized into a collection of tables, each with a specific purpose. Iptables is used to inspect, modify, forward, redirect, and/or drop IP packets. || portmaster-stub-bin AUR Basic concepts Portmaster - Portmaster is a free and open-source application firewall with defaults to improve your privacy.It blocks connections to and from hosts specified in huge block lists (thousands or millions of IP ranges). PeerGuardian GUI (pglgui) - Privacy oriented firewall application.It is super easy and super simple to use. Gufw - GTK-based front-end to ufw which happens to be a CLI front-end to iptables (gufw->ufw->iptables).firewalld (firewall-config) - Daemon and graphical interface for configuring network and firewall zones as well as setting up and configuring firewall rules.The program runs on Linux, FreeBSD, OpenBSD, Windows and macOS and can manage both local and remote firewalls. Firewall Builder - GUI firewall configuration and management tool that supports iptables (netfilter), ipfilter, pf, ipfw, Cisco PIX (FWSM, ASA) and Cisco routers extended access lists.Vuurmuur supports traffic shaping, has powerful monitoring features, which allow the administrator to look at the logs, connections and bandwidth usage in realtime. The configuration can be fully configured through an ncurses GUI, which allows secure remote administration through SSH or on the console. It has a simple and easy to learn configuration that allows both simple and complex configurations. PeerGuardian (pglcmd) - Privacy oriented firewall application.Uncomplicated Firewall - Simple front-end for iptables.You describe your firewall/gateway requirements using entries in a set of configuration files. Shorewall - High-level tool for configuring Netfilter.firewalld (firewall-cmd) - Daemon and console interface for configuring network and firewall zones as well as setting up and configuring firewall rules.Each interface can be configured separately via its own configuration file, which holds an easy and human readable syntax. Firetable - Tool to maintain an IPtables firewall.It makes building even sophisticated firewalls easy - the way you want it. FireHOL - Language to express firewalling rules, not just a script that produces some kind of a firewall.The firewall configuration resembles structured programming-like language, which can contain levels and lists. It allows the entire firewall rule set to be stored in a separate file, and to be loaded with one command. ferm - Tool to maintain complex firewalls, without having the trouble to rewrite the complex rules over and over again.Supports: NAT and SNAT, port forwarding, ADSL ethernet modems with both static and dynamically assigned IPs, MAC address filtering, stealth port scan detection, DMZ and DMZ-2-LAN forwarding, protection against SYN/ICMP flooding, extensive user definable logging with rate limiting to prevent log flooding, all IP protocols and VPNs such as IPsec, plugin support to add extra features. Very easy to configure, handy to manage and highly customizable. Arno's firewall - Secure firewall for both single and multi-homed machines.The iptables package is an indirect dependency of the base meta package, so it should be installed on your system by default. You will only need to install the userland utilities, which are provided by the package iptables. The stock Arch Linux kernel is compiled with iptables support. Note: iptables is a legacy framework, nftables aims to provide a modern replacement including a compatibility layer.
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