Device > Certificate Management > SSL Decryption Exclusion
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Device > Certificate Management > SSL Decryption Exclusion
View and manage SSL decryption exclusions
. There are two types
of decryption exclusions, predefined exclusions and custom exclusions:
- Predefined decryption exclusions allow applications and services that might break when the firewall decrypts them to remain encrypted. Palo Alto Networks defines the predefined decryption exclusions and delivers updates and additions to the predefined exclusions list at regular intervals as part of the applications and threats content update. Predefined exclusions are enabled by default, but you can choose to disable the exclusion as needed.
- You can create custom decryption exclusions to exclude server traffic from decryption. All traffic originating from or destined to the targeted server remains encrypted.You can also exclude traffic from decryption
Use the settings on this page to Modify
or Add a Decryption Exclusion and to Manage
Decryption Exclusions.
SSL Decryption Exclusions Settings | Description |
---|---|
Modify or Add a
Decryption Exclusion | |
Hostname | Enter a Hostname to
define a custom decryption exclusion. The firewall compares the
hostname to the SNI requested by the client or to the CN presented
in the server certificate. The firewall excludes sessions in which
the server presents a CN that contains the defined domain from decryption. You can use asterisks (*) as wildcards to create decryption exclusions for multiple hostnames
associated with a domain. Asterisks behave the same way that carets
(^) behave for URL category
exceptions—each asterisk controls one variable subdomain
(label) in the hostname. This enables you to create both very
specific and very general exclusions. For example:
To exclude video-stats.video.google.com from decryption but not
video.google.com, add *.*.google.com to the SSL Decryption Exclusion
list. Hostnames should be unique for each entry. If a predefined entry is delivered to the firewall
that matches an existing custom entry, the custom entry takes
precedence. You cannot edit the Hostname for a
predefined decryption exclusion. |
Shared | Select Shared to
share a decryption exclusion across all virtual systems in a multiple
virtual system firewall. While predefined decryption exclusions
are shared by default, you can enable and disable both predefined
and custom entries for a specific virtual system. |
Description | (Optional) Describe the application
that you are excluding from decryption, including why the application
breaks when decrypted. |
Exclude | Exclude the application from decryption.
Disable this option to start decrypting an application that was
previously excluded from decryption. |
Manage Decryption
Exclusions | |
Enable | Enable one or more
entries to exclude them from decryption. |
Disable | Disable one or more
predefined decryption exclusions. Because decryption exclusions
identify applications that break when decrypted, disabling one of
these entries will cause the application to be unsupported. The
firewall will attempt to decrypt the application and the application
will break. You can use this option if you want to ensure certain
encrypted applications do not enter your network. |
Show obsoletes | Show obsoletes to
view predefined entries that Palo Alto Networks no longer defines
as decryption exclusions. More about obsolete entries:Updates
to predefined decryption exclusions (including the removal of a
predefined entry) are delivered to the firewall as part of Applications
and Threats content updates. Predefined entries with Exclude
from decryption enabled are automatically removed from
the list of SSL decryption exclusions when the firewall receives
a content update that no longer includes that entry. However,
predefined entries with Exclude from decryption disabled
remain on the SSL decryption list even after the firewall receives
a content update that no longer includes that entry. When you Show
obsoletes, you will see these disabled predefined entries
that are not currently being enforced; you can remove these entries
manually as needed. |
Show Local Exclusion Cache | Show Local Exclusion Cache displays the
sites that the firewall automatically excluded from decryption because
of technical circumstances that prevent decryption, such as pinned
certificates, client authentication, or unsupported ciphers. The Local
SSL Decryption Cache differs from the SSL Decryption Exclusion List
(DeviceCertificate
ManagementSSL Decryption Exclusion),
which contains the sites that prevent decryption that Palo Alto
Networks has identified and to which you can add permanent decryption
exclusions that you choose to make. The the firewall populates the
Local SSL Decryption Cache with locally discovered decryption exceptions,
based on the settings of the Decryption profile associated with
the Decryption policy rule that controls the traffic. Excluded
sites remain in the local cache for 12 hours and then age out. Each
exclusion entry includes information about the application, the server,
the reason why the firewall automatically excluded the site from decryption,
the Decryption profile applied to the traffic, and the Vsys. |