Block IP Addresses and Ranges
Denies access to the whole site for the IP addresses and IPv4 ranges you list, for example a persistent spammer or attacker.
Snippet Library
Security snippets for WordPress
Snippets that harden WordPress: turn off XML-RPC, hide the version number, stop user enumeration, add security headers and block risky uploads. Small, reviewable changes for site owners who want fewer attack points without a heavy security plugin.