A firewall that is provided by software. It often refers to a personal firewall in a user's computer, but software firewalls may be installed in servers as well. Contrast with hardware firewall.

The cybersecurity vendor integrated zero trust network access (ZTNA) into its firewall software and added support in its extended detection and response (XDR) offering for numerous third-party ...

Sophos has also announced updated Sophos Firewall software that provides enhanced protection against cyberattacks, including the ability to integrate third-party threat intelligence feeds.