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Traffic dropped by FTD SSL preprocessor

SIMMN
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I have a FTD 1150 running v7.2 and managed by the FMCv. After the upgrade, I found the "SaaS" SNMPv3 monitoring can not reach internal devices through the FTD. From the packet tracer, it shows the traffic is "blacklisted by the SSL preprocessor"...Screenshot below.

Screenshot 2022-07-13 180213.png

I do have "SSL preprocessing" enabled and "Stop inspecting encrypted traffic" checked within my NAP for SSL preprocessor.

But there is no event log captured for the traffic for some reason. I also tried to do "system support firewall-engine-debug" but FTD showed me nothing...

Hope this is not another bug in v7.2 but the system works just fine with v7.0.1.1... 

Suggestions?

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