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By default WordPress allows unlimited login attempts through the login page but this will lock account after number of login attempts
Features
<ul>
<li>Limit the number of login attempts</li>
<li>Informs user about remaining attempts or block time on login page</li>
<li>Optional logging, optional email notification</li>
<li>Handles server behind reverse proxy</li>
<li>It is possible to whitelist IPs using a filter.</li>
</ul>
Plugin uses standard actions and filters only.

Login Restrict

For security, it will lock account after number of login attempts.

devfelixmoira

Limit the number of login attempts that possible both through the normal login as well as using the auth cookies. 
WordPress by default allows unlimited login attempts either through the login page or by sending special cookies. This allows passwords (or hashes) to be cracked via brute-force relatively easily. 
Limit Login Attempts Reloaded blocks an Internet address from making further attempts after a specified limit on retries has been reached, making a brute-force attack difficult or impossible.
Features:
<ul>
<li>Limit the number of retry attempts when logging in (per each IP). This is fully customizable.</li>
<li>Limit the number of attempts to log in using authorization cookies in the same way.</li>
<li>Informs the user about the remaining retries or lockout time on the login page.</li>
<li>Optional logging and optional email notification.</li>
<li>Handles server behind the reverse proxy.</li>
<li>It is possible to whitelist IPs using a filter. But you probably shouldn’t do this.</li>
</ul>
All your settings will be kept in tact!
Many languages are currently supported in Limit Login Attempts Reloaded plugin but we welcome any additional ones. 
Help us bring Limit Login Attempts Reloaded to even more cultures.
Translations: Bulgarian, Brazilian Portuguese, Catalan, Chinese (Traditional), Czech, Dutch, Finnish, French, German, Hungarian, Norwegian, Persian, Romanian, Russian, Spanish, Swedish, Turkish
Plugin uses standard actions and filters only.

Limit Login Attempts Plus – WordPress Limit Login Attempts By Felix

We are happy to introduce our new Limit Login Attempts plugin.
We hope Limit Login Attempts Plus will be helpful for WordPress community.

Limit Login Attempts

WordPress Limit Login Attempts Plus plugin for Login Protection by Felix Moira

Login Restrict vs Limit Login Attempts Plus – WordPress Limit Login Attempts By Felix