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Need SMB1

I just had an issue with getting a network share to be written to from a network scanner and the problem was because the scanner needed the SMB1 protocol enabled on all the Windows 10 machines.  Whats the big deal with SMB1?  If this is enabled, what is the security issue and what can be done to address it if SMB1 is enabled?
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Dr. Klahn

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I've had this problem with a few clients now, as soon a I hear the word 'Scanner', I bring it up. And stress that the client check their scanners/MFPs to ensure they support SMB 2.02 or above.

Thankfully most expensive MFPs are hired and can be swapped out for newer models, the solution to this problem is to replace your scanners NOT try and re-enable SMB1 on the servers!

The only time I would say enable SMB1 is if if all you servers and clients are running OLD OSs, and 1 or 2 New Windows 10 machines are affected, then Id enable it on THEM . Otherwise don't even consider it.

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issue with getting a network share to be written to from a network scanner

if the goal is to write the scan results to a share, i wonder why the scanner requires SMB1 enabled by (all the) windows 10 clients.  can you explain the use case?

Sara
If your scanner can be configured to use something other than SMB1, switch to that. Alternatively, replace the scanner.

If this is enabled, what is the security issue and what can be done to address it if SMB1 is enabled?
How to address the security issues? That's exactly why SMB1 is disabled by default. It's that big a risk, and others have already answered to what the issues are.
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