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A software firewall is a type of firewall that uses software as its main component. This type of firewall is particularly effective at protecting computer networks from unauthorized access.

A software firewall can filter traffic based on the type of traffic, the source and destination addresses, the protocol, and the port number. A software firewall can also block unsolicited requests, or attacks.

A software firewall can help protect computer networks from unauthorized access, by filtering traffic based on the type of traffic, the source and destination addresses, the protocol, and the port number.