Purchased OCH Firewell today. I set everything up, and everything appeared to be working fine, but when I setup the 'Administrator Area Protection' I got instantly locked out. ie. just shows a 404 Article not found error.
sorry to hear you got locked out of the admin area.
Did you get a screen / popup asking for the username / password you configured in the plugin?
It shows directly when saving the configuration of the plugin.
When closing this popup you will not be able to enter your administrator area.
You can try to load the administrator area in a new browser session (to avoid caching).
If that doesn't work you need to remove (ore rename it to ave a backup) the .htaccess file from your administrator directory (via your host panel or ftp). When you do that, the administrator protection is removed.
It is currently evening here and tomorrow I am out all day, so maybe not very responsive to requests. Let me know if the above tips help.
After saving the configurations it automatically took me to the 404 error. However, after renaming the .htaccess file the pop did show and I was able to login and deactivate the Administrator Admin Protection feature.
When inspecting the server, I did not see .htpasswd file present (as referred). Also, when looking at the .htaccess file content I could not see any extra related script added, so wonder if it is a permission issue?