Help with Exclude Pattern in Content Matching

Unanswered Question
May 3rd, 2012
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C170 Appliance.  I have a DLP policy to try to stop account numbers that are not encrypted.  We have a regular expression with proximity configured.  However, we are getting a lot of false positives on telephone numbers.  Example:  Susie Smith, Member Services PH: 487-555-1212 results in a positive hit.

Does anyone have an example I can use to exclude telephone numbers?  A mitigating issue is that I am already using an exclude pattern for dollar figures such as $1,500.34  that seems to be working.  Money & phone numbers make the bulk of the false positives.


All Rules Match:

Regular expression pattern:


Exclude pattern:


Words or Phrases:




loan, etc. etc.

10 Weight     100 Max Score

Any suggestions greatly appreciated.

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