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
show full-config | grep 'min-proto'
end
The output screenshot below is an example from version 7.2.8 firmware:
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.
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