Technical Tip: Editing the FSSO policy from GUI disables FSSO
Description
This article explains how editing the FSSO policy.
Edit the policy from GUI and do not edit any existing settings, click on 'OK'
Scope
FortiGate
Solution
Follow the steps below:
1) Edit the ipv4 policy from CLI, set the FSSO to default setting.
# config firewall policy
edit 5
set name "Fsso Policy"
set uuid 1fb03232-ccaf-51e9-0a90-e44b439ef138
set srcintf "port1"
set dstintf "port2"
set srcaddr "all"
set dstaddr "all"
set action accept
set status enable
set schedule "always"
set schedule-timeout disable
set service "ALL"
set fsso enable <===========
set nat enable
next
end
2) Edit the policy from GUI and do not edit any existing settings, click on 'OK'

set uuid 1fb03232-ccaf-51e9-0a90-e44b439ef138
set srcintf "port1"
set dstintf "port2"
set srcaddr "all"
set dstaddr "all"
set action accept
set status enable
set schedule "always"
set schedule-timeout disable
set service "ALL"
set fsso disable <===========
set nat enable
Make sure to not edit the IPV4 policy on which the default FSSO setting is enabled.
Always enable the CLI mode, create and edit the IPV4 policy on which the default FSSO setting is to be enabled which would not change the current FSSO settings to disable.