What are the applications for tracking file changes on a web server?

Question

Software and Internet Services

A friend's website was recently broken. His website was down for a week before he knew about it. What programs are there to write letters or send CMC if there is a suspicious change in files on the site?

Answer 1

Security is an integrated approach and not a job for a "program".
How did they break?
What's the engine?
What is hosting?
When was the last time there were updates?
And 100500 more questions and tasks.
Well, what you want is a simple script that will go through all directories and create checksums of files and will periodically check them.

Answer 2

You can write such a script yourself, the script
works as follows, it scans all folders and compiles a checksum of files and their location and access rights.
when rescanning, which can be launched at any time, you can track all changes

Answer 3

If you write your own script, it's easier to write it in bash and run it every day via cron. And in the script, you can use git, which can keep a history of file changes and the "git status" command will display which files have changed.
But this is of course, if the site is on a controlled server, and not on shared hosting, otherwise the PHP script will have to be written, there was such an "antivirus" in Bitrix, perhaps ready to eat.

Answer 4

As an option, I can offer File Watcher from Soft4other. Free, multi-platform, it is possible to monitor in real time via a smartphone (there is a sound alarm).