Today, I locked myself out of my site, as I've done many times before. I got back in by renaming the main.php file in the plugins/system folder, as usual.
However, I ran into a new worrying problem once this file was renamed and before admin tools was brought back live: none of my colleagues could get into the back end of the site: they got 404 errors when trying to bring up the administrator page.
The problem seems to be related to disabling the main.php file and also having password protection on the administrator directory. I fixed it by unblocking my IP and bringing admin tools back up. In the meantime, I was the only one able to log in to the back end - and I think this perhaps had something to do with the fact I had been logged in (and past the administrator password step) prior to getting blocked. But... I felt lucky that I was not locked out of the site too, so I was able to fix this.
I guess my questions are:
1. Has something changed so that re-accessing the site requires more than just accessing the main.php file?
2. How do I disable the password protect on the administrator page - and do you think this could be the cause of the admin 404?
Hope this makes sense, and thanks in advance.