DNS/FBIwarningについて、ここに記述してください。

https://hotforsecurity.bitdefender.com/blog/fbi-warns-of-63-spoofed-domains-impersonating-the-us-census-bureau-24360.html

https://assets.documentcloud.org/documents/20397864/fbi-flash-unattributed-entities-register-domains-10142020.pdf

Recommended Mitigations

Users should pay close attention to the spelling of web addresses, or websites that look trustworthy but may be close imitations of legitimate Census Bureau websites.

Devise a continuity of operations plan for a potential cyber attack; prioritize the systems most important to continued operations.

Ensure the SSL (Secure Sockets Layer) certificate is present, and the top-level domain is “.gov” for the website.

Regularly patch operating systems, software, and firmware.

Update anti-malware and anti-virus software and conduct regular network scans.

Use multi-factor authentication where possible.

Audit networks and systems for unauthorized remote communication.

Disable or remove unneeded software, protocols, macros, and portal