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Firewalls are security controls that permit or block network connections according to policy. They can operate at network boundaries, between internal segments, on individual hosts, or in cloud environments. Basic rules use addresses, ports, protocols, and connection state; more advanced firewalls may inspect applications or encrypted traffic where configured. Their purpose is to limit which systems can communicate, not to determine that all permitted traffic is safe.

Security depends heavily on accurate policy and maintenance. Overly broad, obsolete, or conflicting rules can expose services or allow unnecessary lateral movement, while unmanaged administrative interfaces and unpatched firewall software create additional attack surfaces. Practitioners should restrict management access, apply least-privilege rules, review and remove exceptions, and monitor logs for unexpected connections and policy changes. Firewall logs can support investigation, but encryption, evasion, and traffic allowed by policy may limit what the control can detect.

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Bank Info Security 2 years, 4 months ago

Zscaler CEO: Palo Alto Playing Defense as Firewall Sales Ebb

Jay Chaudhry Says Palo Alto Offering Free Products to New Platform Users Won't WorkZscaler CEO Jay Chaudhry said Palo Alto Networks' strategy of offering free products to new platform customers will "unravel over time" as firewalls become shelfware. Legacy vendors find themselves "in a defensive position" as the role of firewalls shrinks and demand for zero trust security grows.

More from Bank Info Security 1 Mar 2024, 7:30 p.m. Firewalls Palo Alto Networks Strategy Zero Trust Zscaler

Traditional perimeter-based security has become costly and ineffective. As a result, communications security between people, systems, and networks is more important than blocking access with firewalls. On top of that, most cybersecurity risks are caused by just a few superusers – typically one out of 200 users. There’s a company aiming to fix the gap between traditional PAM and IdM

More from The Hacker News 28 Feb 2024, 11:37 p.m. Firewalls Privileged Access Management

Non-techies told to master firmware upgrades and firewall rules. For the infosec hardheads: have some IOCs Authorities from eleven nations have delivered a sequel to the January takedown of a botnet run by Russia on compromised Ubiquiti Edge OS routers – in the form of a warning that Russia may try again, so owners of the devices should take precautions.…

More from The Register 28 Feb 2024, 5:32 p.m. Botnet Compromise Firewalls Firmware Routers Russia Ubiquiti Warning