Eyesite keeps an eye on your website, alerting you by email if any files, anywhere in the directory structure are added, changed, or deleted.
Eyesite scans your directory structures, storing the details of every file in a database table. The details stored include the file date/time, size, and md5 checksum of the file. Every time Eyesite re-scans the directory structure, it re-calculates the md5 checksum of each file, and compares it to the one stored in the database. Eyesite is then able to detect any files in the directory tree that are new, changed, or deleted. If any changes are detected, Eyesite sends you an email.
You can scan your site manually from the admin interface, or get the plugin to scan your site automatically at regular intervals. We sleep better at night knowing that Eyesite will tell us if anyone gets into any of our websites - and we'll know exactly which files were tampered with, so we can fix the problem fast.
The main status page tells you which files were detected as added, changed, or deleted by the last scan. The history page has the full details of every change detected by every scan, retained for as long as you choose. You can browse or search the history to see which files changed, and when.