Log and block IP addresses after a single failed login attempt if they are from a different country to you.
Look for "Country Code Failed Login" in the Plugins screen and click on the "Activate" link.
Once activated a new menu item will appear under the "Settings" menu called "Country Code Failed Login where you manage settings
In the settings screen you select which country you are from. You can also view info about the number of attacks blocked
When logging in you can see a brief overview of attacks blocked in the Dashboard screen