Here's a nice freebie you might like as part of your website monitoring arsenal.
I signed up with Sucuri for their NBIM (network based integrity monitoring) service to help keep an eye on holisticinfosec.org, and have been very satisfied with this free offering (sometimes you get more than what you pay for).
As an example, when my hosting provider updates the server, I know immediately via email.
< Server: Apache/2.2.13 (Unix) mod_ssl/2.2.13 OpenSSL/0.9.8k DAV/2 mod_auth_passthrough/2.1 FrontPage/126.96.36.19935
< X-Powered-By: PHP/5.2.9
> Server: Apache/2.2.14 (Unix) mod_ssl/2.2.14 OpenSSL/0.9.8l DAV/2 mod_auth_passthrough/2.1 FrontPage/188.8.131.5235
> X-Powered-By: PHP/5.2.11
This alert was generated by the Sucuri Network Integrity Monitor.
There's a nice dashboard, offering you history snapshots:
You'll also find a nice web information gathering tool called WIGS which grabs public information available about websites.
Check it out and see what you think.
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