Palo Alto Networks firewalls and Panorama use SSL/TLS service profiles to specify a certificate and the allowed protocol versions for SSL/TLS services. The firewall and Panorama use SSL/TLS for Captive Portal, GlobalProtect portals and gateways, inbound traffic on the management (MGT) interface, the URL Admin Override feature, and the User-ID™ syslog listening service. By defining the protocol versions, you can use a profile to restrict the cipher suites that are available for securing communication with the clients requesting the services. This improves network security by enabling the firewall or Panorama to avoid SSL/TLS versions that have known weaknesses. If a service request involves a protocol version that is outside the specified range, the firewall or Panorama downgrades or upgrades the connection to a supported version.
In the client systems that request firewall services, the certificate trust list (CTL) must include the certificate authority (CA) certificate that issued the certificate specified in the SSL/TLS service profile. Otherwise, users will see a certificate error when requesting firewall services. Most third-party CA certificates are present by default in client browsers. If an enterprise or firewall-generated CA certificate is the issuer, you must deploy that CA certificate to the CTL in client browsers.
Configure an SSL/TLS Service Profile
For each desired service, generate or import a certificate on the firewall (see Obtain Certificates). Use only signed certificates, not CA certificates, in SSL/TLS service profiles.
Select Device > Certificate Management > SSL/TLS Service Profile.
If the firewall has more than one virtual system (vsys), select the Location (vsys or Shared) where the profile is available.
Click Add and enter a Name to identify the profile.
Select the Certificate you just obtained.
Define the range of protocols that the service can use: For the Min Version, select the earliest allowed TLS version: TLSv1.0 (default), TLSv1.1, or TLSv1.2. For the Max Version, select the latest allowed TLS version: TLSv1.0, TLSv1.1, TLSv1.2, or Max (latest available version). The default is Max. Client certificates that are used when requesting firewall services that rely on TLSv1.2 cannot have SHA384 (in releases before PAN-OS 7.1.8) or SHA512 as a digest algorithm. The client certificates must use a lower digest algorithm or you must limit the Max Version to TLSv1.1 for the firewall service.
Click OK and Commit.

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