Last year and a half educated us that WordPress security shouldn't be dismissed by any means. Between 15% and 20% of the world's high traffic sites are powered by WordPress. The fact that it is an Open Source platform and everybody has access to its Source Code makes it a tempting prey for hackers.
WordPress is a system but software has their own flaws and security holes are located on WP. This is the reason why WP often releases new updates . Once they discovered any vulnerability, they provide a new update and immediately make some changes. If you want to know about the how to fix hacked wordpress site plugin, first you have to understand the regions where these plug-ins work to help you protect your investment .
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You can extend the plugin features with premium plugins such as: Amazon S3 plugin, Members only plugin, DropShop etc.. So I think you can use it and this plugin is a good option.
There is. People always know where they can login and they could visit your login form and try out a different combination of user accounts and passwords. So as to prevent this from happening you want to set up Login Lockdown. It is a plugin that allows users to try and login with a wrong password three times. Following that the IP address will be banned from the server for a certain timeframe.