@ithacaindy & anyone else who needs to use DB caching – then you can create a deny all .htaccess file and upload it to your /w3tc/dbcache folder.
To create a deny all .htaccess file:
1. Open Notepad (not Word or WordPad)
2. Add these 2 lines of code.
order deny,allow
deny from all
3. Save the file with this name: denyall.htaccess.
4. Upload it to your /wp-content/w3tc/dbcache folder
5. Rename the denyall.htaccess file to just .htaccess.
And just an FYI – if you are using secure passwords then you have nothing to worry about since one-way hashed passwords cannot be cracked. If you are using a non-secure password then they can be easily cracked and a hacker would just use a tool like BackTrack R3 and not even bother with the extra effort required to download a W3TC dbcache file and crack it.
Note: downloading the hashed password does have one benefit – it allows unlimited attempts at cracking the hashed password, but if it is a secure password then the end result will be the same – the password will not be crackable.