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What is a firewall? A firewall is a device used for network security. It monitors network traffic (both incoming and outgoing) and then, based on a set of security rules, either permits or blocks data packets.

To learn more, read our Firewalls Buyer's Guide (Updated: November 2022).

A firewall serves as a barrier between an internal network and incoming traffic in order to block malicious traffic such as hackers and viruses. Firewalls are intended to protect key IT assets from security threats such as denial of service attacks or data theft.

Based on rules pre-established by the network administration team, firewalls analyze incoming traffic and filter any traffic coming from an unsecured or suspicious source so as to prevent attacks. By setting restrictions such as what websites are allowed or blocked or who has authorized access, firewalls guard traffic at a computer’s ports (entry points), where information is exchanged with external devices.

Firewalls Upgrade Path Reviews

Showing reviews of the top ranking products in Firewalls, containing the term Upgrade Path

Cisco Secure Firewall: Upgrade Path

PW

reviewer1500255 says in a Cisco Secure Firewall review

Senior Network And Security Engineer at a pharma/biotech company with 201-500 employees

From start to finish, including production rollout for other areas, deployment took roughly one month. We did it all in-house.

Some maintenance is required involving security patches. Cisco is really good at deploying those or not deploying those, but putting those out and having release notes and upgrade paths and just the information behind all of their patches. Cisco does a really good job with that.

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