One of the key features to look for in a firewall is its ability to block zero-day malware.
WatchGuard
February 23, 2022 – The CSIA, National Security Agency, and FBI released a Joint Cyber Security Announcement today indicating that Cyclops Blink has been deployed to WatchGuard protected devices. This particularly insidious malware is thought to emanate from Sandworm, also known as Voodoo Bear, and said to originate from the Russian Main Center for Special Technologies.
