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Background for this topic.

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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The government-backed crew also enjoys ransomware as a side hustle Iranian government-backed cybercriminals have been hacking into US and foreign networks as recently as this month to steal sensitive data and deploy ransomware, and they're breaking in via vulnerable VPN and firewall devices from Check Point, Citrix, Palo Alto Networks and other manufacturers, according to Uncle Sam.…

More from The Register 29 Aug 2024, 6:00 a.m. Check Point Citrix Firewalls Government Hacking Iran Palo Alto Networks Ransomware Theft VPN Vulnerability

Ground stations are the perfect place for the Great Firewall to block things China finds unpleasant The multiple constellations of broadband-beaming satellites planned by Chinese companies could conceivably run the nation's "Great Firewall" content censorship system, according to think tank The Australian Strategic Policy Institute. And if they do, using the services will be dangerous.…

More from The Register 28 Aug 2024, 1:58 p.m. Australia China Firewalls Strategy Warning