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.

Data Doctors’ Ken Colburn explains how firewalls can protect devices from bad actors online. The good news is that you likely already use them.

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 ...