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Try to understand Exceptions Regex Urls

JasonIstre

I don't understand this.  Doesn't the first Regex cover all the others?  Sophos provides this default rule for Sharepoint:

Matching URLs:
^([a-zA-Z0-9.-]*\.)?sharepointonline\.com\/
^cdn\.sharepointonline\.com\/
^privatecdn\.sharepointonline\.com\/
^publiccdn\.sharepointonline\.com\/
^static\.sharepointonline\.com\/
 
Doesn't ^([a-zA-Z0-9.-]*\.)?sharepointonline\.com\/ basically amount to *.sharepointonline.com/*.  Why are the other 4 needed?
 
Jason
 


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  • FormerMember
    0 FormerMember

    Hi Jason,

    The first entry "^([a-zA-Z0-9.-]*\.)?sharepointonline\.com\/" should be enough to match all others. You mentioned that this is default rule for SharePoint provided by Sophos, as far as I know it is not in default web exceptions on Sophos XG or UTM. 

    Thanks,

  • 0 in reply to FormerMember

    It is provided by Sophos here in the file provided for office365:

    https://community.sophos.com/kb/en-us/132291

     

  • +1 in reply to JasonIstre

    Hello JasonIstre,

    as H_Patel said, The first entry [...] should be enough to match all others. This is the answer to your first question Doesn't the first Regex cover all the others?
    As for Why are the other 4 needed? - perhaps no one can really tell. Back in the 1980s we had access to parts of IBM's source code. Occasionally you stumbled over snippets of dead code (i.e. instructions that could never be reached) or redundant logic. If you asked a technician why is this there? an old hand's stock response was Just to confuse the Russians. [;)]

    Christian

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  • +1 in reply to JasonIstre

    Hello JasonIstre,

    as H_Patel said, The first entry [...] should be enough to match all others. This is the answer to your first question Doesn't the first Regex cover all the others?
    As for Why are the other 4 needed? - perhaps no one can really tell. Back in the 1980s we had access to parts of IBM's source code. Occasionally you stumbled over snippets of dead code (i.e. instructions that could never be reached) or redundant logic. If you asked a technician why is this there? an old hand's stock response was Just to confuse the Russians. [;)]

    Christian

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