This is a potential security issue, you are being redirected to https://csrc.nist.gov.
A software-based firewall installed on a desktop or laptop computer to monitor and control its incoming and outgoing network traffic.
NIST SP 800-41 Rev. 1
A software program that monitors communications between a PC and other computers and blocks communications that are unwanted.
NIST SP 800-114 [Superseded]
A software application residing on a client device that increases device security by offering some protection against unwanted network connections initiated by other hosts. Personal firewalls may be client managed or centrally managed.
NIST SP 800-127 [Withdrawn] under Personal firewall
A utility on a computer that monitors network activity and blocks communications that are unauthorized.
NIST SP 800-69 [Withdrawn]