Temporarily Disable TLS Decryption
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Network Security

Temporarily Disable TLS Decryption

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Temporarily Disable TLS Decryption

If a decryption issue requires more than a short period of time to diagnose, you can temporarily disable and then enable SSL decryption without disrupting network traffic.
Where Can I Use This?What Do I Need?
  • NGFW
Depending on the products you're using, you need at least one of...
You can temporarily disable SSL/TLS decryption to troubleshoot or validate your decryption deployment. For example, imagine a website does not display as expected and you suspect decryption might be the cause. You can suspend SSL/TLS decryption until you confirm or rule out decryption as the cause. Another scenario is a recent TLS decryption deployment that affects specific applications and services but reviewing a vast decryption rulebase is impractical. In this scenario, disabling decryption offers an efficient alternative to analyzing all decryption policy rules and profiles.
You can use CLI commands to suspend SSL/TLS decryption and resume decryption when you're ready. These operations don't require changes to decryption policy rules or a Commit of the updated configuration, so you won't disrupt network traffic.
Disabling SSL decryption for any period of time impacts your security posture. Only disable decryption for as long as necessary.
  • Disable SSL decryption.
    The command to disable SSL decryption does not persist in the configuration after a reboot. Decryption automatically resumes after a reboot, regardless of whether the original issue has been fixed.
    Use the set system setting ssl-decrypt skip-ssl-decrypt yes CLI command.
  • Re-enable SSL decryption.
    Use the set system setting ssl-decrypt skip-ssl-decrypt no CLI command.