FortiGate
FortiGate Next Generation Firewall utilizes purpose-built security processors and threat intelligence security services from FortiGuard labs to deliver top-rated protection and high performance, including encrypted traffic.
Rosalyn
Staff
Staff
Article Id 196330

Description


This article describes how to change the TLS version via CLI when accessing the GUI.

Solution


By default, TLS 1.1 and TLS 1.2 are enabled when accessing to the FortiGate GUI via a web browser.


To verify what version is enabled:

 

config system global

 

if VDOMs are enabled, enter this again:

 

config system global 

 

get | grep 'min-proto'

 

To change this setting from the CLI:

 

config system global
    set admin-https-ssl-versions (shift + ?)
<- To list the available TLS version.

tlsv1-0 TLS 1.0.
tlsv1-1 TLS 1.1.
tlsv1-2 TLS 1.2.
set admin-https-ssl-versions tlsv1-2
<- With this setting, only TLS 1.2 is allowed.

end

 

From FortiOS 6.4, tlsv1-0 is no longer supported and instead, tlsv1-3 was introduced:

 

config system global

set admin-https-ssl-versions
tlsv1-1 TLS 1.1.
tlsv1-2 TLS 1.2.
tlsv1-3 TLS 1.3.