Protect your website from xmlrpc brute-force attacks,DOS and DDOS attacks, this plugin disables the XML-RPC and trackbacks-pingbacks on your WordPress website.

PLUGIN FEATURES
(These are options you can enable or disable each one)

Disable access to xmlrpc.php file using .httacess file
Automatically change htaccess file permission to read-only (0444)
Disable X-pingback to minimize CPU usage
Disable selected methods from XML-RPC
Remove pingback-ping link from header
Disable trackbacks and pingbacks to avoid spammers and hackers
Rename XML-RPC slug to whatever you want
Black list IPs for XML-RPC
White list IPs for XML-RPC
Some options to speed-up your wordpress website
Disable JSON REST API
Hide WordPress Version
Disable built-in WordPress file editor
Disable wlw manifest
And some other options

What is XMLRPC

XML-RPC, or XML Remote Procedure Call is a protocol which uses XML to encode its calls and HTTP as a transport mechanism.
Beginning in WordPress 3.5, XML-RPC is enabled by default. Additionally, the option to disable/enable XML-RPC was removed. For various reasons, site owners may wish to disable this functionality. This plugin provides an easy way to do so.

Why you should disable XML-RPC
Xmlrpc has two main weaknesses

Brute force attacks:
Attackers try to login to WordPress using xmlrpc.php with as many username/password combinations as they can enter. A method within xmlrpc.php allows the attacker to use a single command (system.multicall) to guess hundreds of passwords. Daniel Cid at Sucuri described it well in October 2015: “With only 3 or 4 HTTP requests, the attackers could try thousands of passwords, bypassing security tools that are designed to look and block brute force attempts.”
Denial of Service Attacks via Pingback:
Back in 2013, attackers sent Pingback requests through xmlrpc.php of approximately 2500 WordPress sites to “herd (these sites) into a voluntary botnet,” according to Gur Schatz at Incapsula. “This gives any attacker a virtually limitless set of IP addresses to Distribute a Denial of Service attack across a network of over 100 million WordPress sites, without having to compromise them.”

Disable XML-RPC-API