I believe this was specific to IPv6.   Are you sure you are filtering IPv6 and 
not just IPv4?

Mark

> On Oct 13, 2020, at 8:51 AM, Larry Smith <[email protected]> wrote:
> 
> Hmmmmm, got one yesterday, then three more this morning.
> They appear to be going down my AS contact list - one this morning
> was to "abuse".  They are now blocked here.
> 
> All four advertising their DSAV - Destination-Side Source Address Validation.
> 
> And I have had filters blocking my IP from outside my network for over 20 
> years.  Also block anything leaving my network that is not my IP (and log 
> it).
> 
> -- 
> Larry Smith
> [email protected]
> 
> On Mon October 12 2020 22:57, John Osmon wrote:
>> On Mon, Oct 12, 2020 at 05:49:18PM -0400, Mark - Myakka Technologies wrote:
>> [...]
>> 
>>> I can not think of any
>>> valid reason for someone to spoof my IP on incoming packets.
>> 
>> There are some asymmetrical cases where you may see your own addresses
>> coming in over an edge router.  Most of them are solved better with
>> VPNs, but they do exist.
>> 
>> There are few cases anymore where not following BCP38 is required...
> 
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