Windows Security Log Event ID 4965

Operating Systems Windows 2008 R2 and 7
Windows 2012 R2 and 8.1
Windows 2016 and 10
Category
 • Subcategory
Uncategorized
 • Subcategory could not be determined
Type Success
Corresponding events
in Windows 2003
and before
 
Discussions on Event ID 4965
System - Audit IPsec Driver Subcategory

4965: IPsec received a packet from a remote computer with an incorrect Security Parameter Index (SPI).

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I haven't been able to produce this event. Have you? If so, please start a discussion (see above) and post a sample along with any comments you may have! Don't forget to sanitize any private information.

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Examples of 4965

IPsec received a packet from a remote computer with an incorrect Security Parameter Index (SPI). This is usually caused by malfunctioning hardware that is corrupting packets. If these errors persist, verify that the packets sent from the remote computer are the same as those received by this computer. This error may also indicate interoperability problems with other IPsec implementations. In that case, if connectivity is not impeded, then these events can be ignored.

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

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