Technical Tip: How to increase the buffer length of the FortiGate GUI CLI Console

[TAlKhatib]

Description

This article describes that the CLI console in the FortiGate Web-Based Manager (GUI) is limited to 50 lines by default. 

In older FortiOS versions this can be increased to a maximum of 9999 lines.

Newer FortiOS GUI has a preset limit of max ~100.000 lines (non-configurable).

Scope

FortiOS.

Solution

1. Edit the CLI console settings by selecting the edit icon at the top right corner of the console.
   
   

2. Increase the buffer length to the required value (additional customization is available).
   These options are not available anymore in the newer (supported) versions:
   

From FortiOS 5.4 onwards there are no options that can be configured concerning the CLI applet (neither on the CLI itself nor within the FortiGate config).

Evolution of CLI layout throughout different FortiOS versions:

FortiOS 5.6.

FortiOS 6.0.

FortiOS 6.2.

FortiOS 6.4.

FortiOS 7.0.

FortiOS 7.2.

FortiOS 7.4.

FortiOS 7.6.