patchmypc.com Open in urlscan Pro
2606:4700:10::6816:45b9  Public Scan

Form analysis
1 forms found in the DOM

GET https://patchmypc.com/

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DIGEST MISMATCH DUE TO DOWNLOAD URL BEING FILTERED BY FIREWALL OR WEB FILTER

If you received an error message in the PatchMyPC.log similar to the one shown
below when publishing a third-party update this article should help.

Digest of the downloaded update doesn’t match the digest from the catalog: Hash
from catalog [0Io0A82tYc06ybySLZ1osB5VYzY=] doesn’t match downloaded update hash
of [YQMfSKsyclBqVjGnvRdBuoCCcvY=]
This error appears to be a known error. Please see our KB article
https://patchmypc.com/digest-mismatch-download-filtered for the resolution.

Topics covered in this article:

 * Why the Hash Check?
 * Review Download Failures from Firewall Rules for Previous Synchronizations
 * Resolution to this Specific Hash Check Failure


WHY THE HASH CHECK?

Whenever we download an update file from a vendor’s website to publish to
WSUS/SCCM, we validate the hash of the current binary downloaded matches the
original hash within the catalog metadata. This check ensures that if a binary
is compromised or changed on the vendors websites, we will not publish the
software update. We have a deep dive into our security validation process here.


REVIEW DOWNLOAD FAILURES FROM FIREWALL RULES FOR PREVIOUS SYNCHRONIZATIONS

We store the last download response code and domain for currently enabled
products. This can be helpful when reviewing download failures for currently
enabled products.

The download history can be found on a CSV file in:
%InstallDir%\PatchMyPC-DownloadHistory.csv



Here’s an example of the data included in the PatchMyPC-DownloadHistory.csv
file. You can use the domain column to create firewall exceptions based on the
products enabled and failing to download.




RESOLUTION TO THIS SPECIFIC HASH CHECK FAILURE

If you received the error message above that links our to this article, that
means the hash check failed, and the downloaded file size was less than 100 kb.

When the downloaded file is less than 100 kb in size, this almost always
correlates to a web filter or firewall blocking the download from the server
that is running our publishing service.

Step 1 – Open the PatchMyPC.log from the publishing service.



Step 2 – Copy the download URL from the PatchMyPC.log for any updates receiving
this hash error.
 

Step 3 – Paste the download URL into a web browser on the same server running
the publishing service and check if you receive an error that a web filter is
blocking the download.



Step 4 – You will need to get exceptions created for any downloads receiving
this hash error for “digest mismatch download filtered“.

A full list of possible domains used for products in our catalog can be found at
https://patchmypc.com/list-of-domains-used-for-downloads-in-patch-my-pc-update-catalog  


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