12/30/2023 0 Comments Ssl tls decryptionOnce again your browser will confirm that you are now using TLSv1.2 : Block all sessions with a protocol version less that TLS 1.2 :īy selecting the minimum version of TLSv1.2 you will immediately notice that certain Encryption Algorithms are disabled (3DES and RC4) as is the Authentication Algorithm MD5.Īlso, in this case, you will see that the firewall modifies the Client Hello to include only TLSv1.2 version and ciphers:.If the server then supports RC4, you can then confirm in your browser that the connection is effectively using RC4 as the encryption algorithm: Using the above configuration, the firewall will modify the Client Hello to include only the RC4 cipher: Notice that you can also select the minimum and maximum version of the protocol versions. In the profile, you can see the supported Encryption Algorithms and supported Authentication Algorithms. You can, however, create a custom profile as show in the example below The values of this default profile cannot be changed: In the screenshot, you will see the values that are configured on the default profile. This profile will be applied to all decryption sessions that do not have a custom profile applied to them. If the user does not create a custom decrpytion profile, then we fall back to the 'default' profile. It also adds the option to block expired certificates or server certificates with untrusted issuers without doing SSL decryption.ĭecryption profiles are configured in the Objects tab > Decryption profile. Would you like to have more control over which protocols or algorithms to support and allow? A feature introduced in PAN-OS 7.0 adds the ability to enforce cipher suites and/or protocols as part of the decryption profile.
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