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Cisco ACE XML Gateway (WAF) blocking .xls and .xlsx files

Hi, our WAF is blocking the excel format files...

Matched signature RestrictedChars.x03 va rule RestrictedChars.charsparamAll in request

10.61.1.50 from application IB-WEB-VAPP Match was in REQUEST_POSTPARAM['filename'] which

had value (PK). Request path was: /CorporateBank/app/upload.salaryupload.onup

Matched signature RestrictedChars.x03 va rule RestrictedChars.charsparamAll in request

10.61.1.50 from application IB-WEB-VAPP Match was in REQUEST_POSTPARAM['filename'] which

had value (Garbage). Request path was: /CorporateBank/app/upload.salaryupload.onup

We want to know if this is default behavior and WAF blocks these files in the default singature set policy?

And (with the backdrop of security) will it be safe to create an exemption to permit the upload ?

Any related cisco document will also be a great help...

WAD_EROORR.jpg

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