Perform the initial configuration for a NGFW.
By default, the PA-Series firewall has an IP address of 192.168.1.1 and a
username/password of admin/admin. For security reasons, you must change these
settings before continuing with other firewall configuration tasks. You must perform
these initial configuration tasks either from the MGT interface, even if you do not
plan to use this interface for your firewall management, or using a direct serial
connection to the console port on the firewall.