Software Firewall For Linux. XFwall is a multi-distro professional graphical firewall software for Linux aimed at advanced users. IPFire is a Linux firewall distro focusing on user-friendliness and effortless installation without compromising your safety supporting some helpful features like intrusion detection.
IPFire is a Linux-based distribution intended for Firewalls and Routers. Iptables is a rule based firewall system which facilitates Network Address Translation NAT packet filtering and packet mangling in the Linux 24 and later operating systems. The system is regularly updated and maintained but it doesnt have many features found in pfSense or OPNSense.
IPfire is a continuation of IPCop mentioned above but has been rewritten from scratch.
Its designed with modularity and highly flexibility. 2 OPNsense It is an open source FreeBSD based firewall and routing platform for Linux based systems. It is also called Netfilter. IPFire is one of the best open source Linux firewall software available in the market.