Recently, when a friend was using his Yunfu host, he discovered that SSH has been violently scanned by others. Although the SSH account and password have never been guessed, if someone keeps staring at him, something will happen sooner or later. I helped him set up an S-S-H login whitelist, which only allows login access from his own IP, and rejects all other IPs.
As everyone's awareness of online security increases, and major Internet companies promote the popularization of HTTPS, HTTPS SSL has now basically become the standard for building websites. Thanks to the free SSL certificates provided by Let’s Encrypt, Digicert, TrustAsia, Symantec, etc., the cost of using HTTPS is now negligible whether it is a personal website or a corporate website.
