sleepm

Manage WordPress proxy in one page, you can set some domains that can be accessed through proxy. 
Also, http basic auth support.

WP Proxy

Manage WordPress proxy in one page, you can set some domains that can be accessed through proxy. Also, http basic auth support.

luis

This plugin can block “Tor access”, “Proxy Access”, “Commandline Access” and more. 
When it blocks unauthorized access, you can choose setting “Show message” or “Redirect”.
Googlebot,Twitterbot and other crawler can access own wordpress.
<ul>
<li>If you using cache plugin or cache system, this plugin doesn’t run properly. *</li>
</ul>
<h4>list of exception.</h4>
“google”,”msn”,”yahoo”,”bing”,”hatena”, 
“data-hotel”,”twttr.com”,”eset.com”,”linkedin.com”, 
“ahrefs.com”,”webmeup.com”,”grapeshot.co.uk”,”blogmura.com”, 
“apple.com”,”microad.jp”,”linode.com”,”shadowserver.org”,”ezweb.ne.jp”
You can add exceptions IP or UserAgent. 
See more “Secreenshot”.

block-wpscan

This plugin can block "Tor access", "Proxy Access", "Commandline Access" and more. When it blocks unauthorized access.

WP Proxy vs block-wpscan