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List of Free Software Firewall

Firewall software

Personal firewall, Ultimately, all firewalls are software-based, but some firewall solutions are provided as software solutions that run on general purpose operating systems. The following table lists different firewall software that can be installed / configured in different general purpose operating systems.
FirewallLicenseCost / Usage LimitsOS
Avast Internet SecurityProprietaryUS$39.99 per yearMicrosoft Windows
Comodo Internet
ProprietaryFreeWindows 7 / Vista / XP SP2/ Windows 8
GlasswireProprietaryFreeWindows 7 / Windows 8 / Windows 10
Intego VirusBarrierProprietarypayMac OS X 10.5 or later; on an Xserve
Personal Firewall
ProprietaryFree for 1.x / Paid for 2.xWindows Windows 8, 7, Vista, XP, Windows 2000, Server 2008/2003 x32/x64
Internet Security
Proprietary$59,95 Year / 30 day trialWindows unknown versions x32/x64
Personal Firewall
Proprietary€36 YearWindows unknown versions x32/x64
Forefront Threat
ProprietarydiscontinuedWindows unknown versions x64
Norton 360Proprietary$59.99 YearWindows unknown versions x32/x64
Online Armor
Personal Firewall
ProprietarydiscontinuedWindows unknown versions x32/x64
Firewall Pro
ProprietarydiscontinuedWindows unknown versions x32/x64
PC Tools
Firewall Plus
ProprietarydiscontinuedWindows unknown versions x32/x64
ProprietaryFreeWindows 10, Windows 8/8.1, 7, Vista and XP x32
Personal Firewall
ProprietarydiscontinuedWindows unknown versions x32
Personal Firewall
ProprietarydiscontinuedWindows unknown versions x32
Windows FirewallProprietaryIncluded with Windows
XP SP2 and later
ALL Windows Versions x32/x64
ZoneAlarmProprietaryFree / PaidWindows 7 / Vista / XP SP3/ Windows 8, 8.1. 10 x32/x64
Netfilter/iptablesGPLFreeLinux kernel module
ShorewallGPLFreeLinux-based appliance
PeerBlockGPLFreeWindows 8/8.1, 7, Vista x32/64
FirewallDGPLFreeFedora, Red Hat Enterprise Linux, CentOS
NPFBSDFreeNetBSD kernel module
PFBSDFree*BSD kernel module
ipfirewallBSDFree*BSD package
IPFilterGPLv2FreePackage for multiple UNIX-like operating systems