Content filter.

For many kinds of monitors, ProtoMon can receive some data while performing the check:

• For HTTP monitors it downloads a specified URL.
• For FTP or SFTP monitors it can download any file from the server.
• For Telnet or SSH monitors it executes a script on the remote server and receives its output.
• For Console monitor it receives the console output.

The program can check this content against the specified rules, and trigger an alert, if this check fails.

The content filter consists of a words or phrases that should (or should not) be found in the received content, joined together by logical operators and grouped by parenthesis. Phrases should be put in quotes. Monitor check passes, if evaluation of this expression returns "true". For example:

(home or "contact us") and not "page not found"

Additionally, ProtoMon can save the content on disk. This allows you to open the source data in some text editor, and easily copy and paste the phrases to the filter.