Windows Security Log Event ID 4963

Operating Systems Windows 2008 R2 and 7
Windows 2012 R2 and 8.1
Windows 2016 and 10
Windows Server 2019 and 2022
Category
 • Subcategory
Uncategorized
 • Subcategory could not be determined
Type Success
Corresponding events
in Windows 2003
and before
 

4963: IPsec dropped an inbound clear text packet that should have been secured

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Examples of 4963

IPsec dropped an inbound clear text packet that should have been secured. This is usually due to the remote computer changing its IPsec policy without informing this computer. This could also be a spoofing attack attempt.

Remote Network Address: %1
Inbound SA SPI:  %2

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