Out of thousands, here are a few useful links to Internet resources:
The Internet Reference Desk, like at the library, but better.
Read every week, on personal and Internet security: https://krebsonsecurity.com/
Many things DNS, and other tools: http://www.dnsstuff.com
Many things about email delvery settings: https://mxtoolbox.com/
Symantec’s “State of Spam” page
VIPRE’s Blogs about security
One of many maps showing malware attacks: https://www.fireeye.com/cyber-map/threat-map.html