Shulou(Shulou.com)06/01 Report--

The current environment is version 8.1.2, upgraded to 9.0.4

When upgrading across major versions, it is necessary to understand the current version of the crossover version, which is generally explained in the official documentation.

Above version 8.1, after downloading version 8.1.3 and installing successfully, do not rush to download version 9.0.4. The corresponding explanation is also given in the official documentation. Download the basic version of the corresponding version, 9.0.4, and the basic version is 9.0.0. This does not need to be installed. At this time, after downloading 9.0.4 successfully, it cannot be installed. It is prompted that version 8.1.3 is required for installation. After successfully installing version 8.1.3, the solution to the problem of error reporting is also very simple. You need to upgrade the database to the latest version and execute the following command:

Try to install again, and this time there will be no problem! (the default is to access the Internet through a management port, and you must be authorized to see the version of the firewall online.)

In addition, the virtual version of the firewall can set a serial port to manage the console of the firewall, this operation will lead to the phenomenon that the firewall can not get up after a successful upgrade, so the serial port can be cancelled. This will cause the following pages to loop indefinitely, as shown in the following figure:

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