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Optiv Cybersecurity Dictionary Breadcrumb Home Cybersecurity Dictionary Firewall What is a Firewall? Firewalls are network security devices or systems that monitor and regulate network traffic (incoming and outgoing) based on defined security rules. Firewalls can be network or host-based. Hardware-based network firewalls filter inter-network traffic (typically between an internal and external network like the internet), while host-based firewalls control traffic in and out of the computers on which they reside. Image Related Services Endpoint Security Network Security Connected Devices Penetration Testing Related TermsNetwork SecurityIntrusion Detection Systems (IDS) and Intrusion Prevention Systems (IPS)Micro-Segmentation Share: Contact Us
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