Is there a way to determine if a threat signature requires ssl decrypt in order to provide protection. I undertsnad this could have at least three posibilities being fully required, partially required, and not required. Using signature 14616 in content version 608 as an example, I cannot determine if I will ever see hits on this threat ID if I don't leverage ssl decrypt on the session.
Non of the threat id's *require* that your traffic is decrypted, if it detects the signature then it will trigger. If it can't detect the signature because of the encryption then it will not trigger.
Not a single signature will trigger on encrypted traffic. If you want to check encrypted traffic for threats, you MUST decrypt it.
Yeah, signatures which check protocol compliance can still work.
But a short answer would be: if you want to check an encrypted session for possible threats, you have to decrypt it.
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