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Are you still experiencing hits for "Non-RFC Compliant SSL Traffic on Port 443?" Threat ID 56112. I have seen a large uptick in this activity since Palo Alto updated the threat on 11-19-2019. Thanks.
We are still experiencing hits on that threat signature across multiple firewalls at this time. Due to the informational severity and recent holidays, I have not had a chance to investigate it much at all. I will probably end up opening a support case for clarification on this matter.
I am seeing lots of alerts for
Name: Non-RFC Compliant SSL Traffic on Port 443
Unique Threat ID: 56112
to 126.96.36.199 which belongs to Facebook. However, the device (android mobile phone) that is causing the alerts does not have facebook app installed.
Few Non-RFC Complaint signatures that was introduced in late last year and non-RFC Compliant SSL Traffic on Port 443(56112) is one of them. Please note that the main aim behind the signature TID 56112 is to detect suspicious and non-RFC compliant SSL traffic on port 443 or applications sending non-SSL traffic using port 443 or indicate possible malicious activity.
You can capture the facebook traffic from the android device on your Firewall and check the traffic SSL protocol.
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