I have had two WordPress blogs hacked into previously. That was in a time when I was doing almost no internet advertising, and until I found time to handle the situation (weeks later), these sites were penalized at the main search engines. They weren't eliminated, however the evaluations were reduced.
clean hacked wordpress site will inform you that there is no htaccess within the directory. You may put a.htaccess record in to this directory if you would like, and you can use it to handle the wp-admin directory by Ip Address address or address range. Details of how you can do this are plentiful around the internet.
This is fantastic news as it means that there is a strong community of developers and users who can improve the platform. Whenever there is a group of people trying to achieve something, there'll always be people who will try a fantastic read to take down them.
For me it's a WordPress plugin. They're drop dead easy to set up, have all the features you need for a task like this, and are relatively inexpensive, especially when compared to having to hire someone to have this done for you.
You can create a firewall that blocks hackers. From coming into your own files, the firewall prevents the hacker. You must have version of Apache. Upgrade your PHP also. It is essential that your system is filled with upgrades.
There are always going to be risks being online (or even just being alive!) Also it's easy to get caught up in the panic. We often put the breaks on, when we get caught up in the fear. This isn't a reaction that is good. Take some our website common sense precautions forge ahead. It will need to be addressed then, if something does happen and of quaking in your boots check my source 23, no amount will have helped. If nothing does, all is good and you have not made yourself sick.