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What Is a Firewall and Do you Need One?

Adam Levin

A firewall is a network security device or program designed to prevent unauthorized and malicious internet traffic from entering a private network or device. Firewalls filter incoming network traffic at a computer’s entry points, or ports, where information is exchanged between the computer network and external devices. Probably not.

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Chinese national charged for hacking thousands of Sophos firewalls

Security Affairs

has charged a Chinese national for hacking thousands of Sophos firewall devices worldwide in 2020. has charged the Chinese national Guan Tianfeng (aka gbigmao and gxiaomao) for hacking thousands of Sophos firewall devices worldwide in 2020. Tianfeng worked at Sichuan Silence Information Technology Co., based Sophos Ltd.

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SHARED INTEL: Report details how cyber criminals leverage HTTPS TLS to hide malware

The Last Watchdog

From January through March 2021, TLS concealed 45 percent of the malware Sophos analysts observed circulating on the Internet; that’s double the rate – 23 percent – seen in early 2020, Dan Schiappa, Sophos’ chief product officer, told me in a briefing. And then they may use off-the-shelf malware to carry out their attack.

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Is your firewall stuck in the 80s?

Cisco Security

Modernize your firewall for greater security resilience. Cybersecurity has changed dramatically since the dawn of firewalls in the 1980s. Today’s workers, data, and applications are everywhere, and firewalls must be as well. So, can your firewall grow with you? The firewall is a critical foundation for security.

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Back to the Future of Firewall

Cisco Security

As a network and workload security strategy leader, I spend a lot of time thinking about the future of the good old network firewall. Spoiler alert: I’m not going to join the cool club of pronouncing the firewall dead. The two main problems for the firewall to overcome in all those new deployment scenarios are insertion and visibility.

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US Disrupts Russian Botnet

Schneier on Security

The operation copied and removed malware from vulnerable internet-connected firewall devices that Sandworm used for command and control (C2) of the underlying botnet. The botnet “targets network devices manufactured by WatchGuard Technologies Inc. WatchGuard) and ASUSTek Computer Inc. Those devices are still vulnerable.

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What Is a Next-Generation Firewall?

eSecurity Planet

A next generation firewall (NGFW) performs deep packet inspection to check the contents of the data flowing through the firewall. Unlike more basic firewalls that only check the header of data packets, NGFWs examine and evaluate the payload data within the packet. Who Needs a Next-Gen Firewall?

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