Nagios Support Forum

URL Content Regular Expression Match
Monitors the URL to ensure the specified regular expression is found in the content of the web page. A content mismatch may indicate that your website has experienced a security breach or is not functioning correctly.

- what is it exactly to enter?
- say if we are using nagios.org page ?

Do we check content before or after login?
- would be a different message in this case

This looks at the web page nagios.com, and for the string 'Keep your network'. It will only work for a login that is basic auth and you would append it as -a username:password.

If you want to check content prior to logging in, don't pass the -a authentication information. If you want to check content after logging in, then use it.

Note that this will NOT work with "username" and "password" fields that are part of forms on a web page. For instance, a bank page login is typically an interface to a web application and the username/password information is entered as fields on a page. Unless you can pass that information as GET parameters on the URL (which is VERY insecure) then this plugin will not allow you to check for content that is behind an authentication wall.

eloyd wrote:If you want to check content prior to logging in, don't pass the -a authentication information. If you want to check content after logging in, then use it.

Note that this will NOT work with "username" and "password" fields that are part of forms on a web page. For instance, a bank page login is typically an interface to a web application and the username/password information is entered as fields on a page. Unless you can pass that information as GET parameters on the URL (which is VERY insecure) then this plugin will not allow you to check for content that is behind an authentication wall.

Is there any other way to pass authentication?
- specifically when Single-Sign-Ons are used?

You may be able to use webinject to do what you need. http://www.webinject.org/plugin.html

Thanks @eloyd!

@dlukinski - are we good to mark this thread as resolved?

rkennedy wrote:Thanks @eloyd!

@dlukinski - are we good to mark this thread as resolved?

Thank you.

Problem is not resolved, but answers clarified some things for me.

Is it okay if I lock this up? The webinject stuff will be what you're looking for and you have a few posts open on that.

ssax wrote:Is it okay if I lock this up? The webinject stuff will be what you're looking for and you have a few posts open on that.

Yes please