Recently I got hold of a Fortinet Lab FG-100D. The Fan in this unit is around 50db and not suitable for a lounge. The device is not licensed and out of support so I could ‘tweak’ it!

The quietest 4-Pin ( sending feedback back to to the Fortinet of fan speed so it can adjust ) 40mmx 20mm fan I could find was a NF-A4x20 with 15db of noise , however much-reduced airflow!

The NF-A4x20 comes with a different fan plug then the Fortinet Socket. The connect should match the other size , however a little pressure helps the fortinet socket accept this! 

The good thing about this fan is it also comes with a LNA ( Low noise adapter ) a cable that drops down the (voltage) speed of the fan. The 100D also has two power fan points. I was able to put the LNA on the original fan, then readjust the fans like below. I ran both for a week however sometimes the old fan would whir up, so I ended up disconnecting the original and left the NF-A4x20 and it has been stable!

 

 

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On the Fortigate , Create a new Interface and assign it to the Uplink of your internet or DMZ with a Vlan ID and Enable DHCP

Create a policy to allow outbound

 

On the Switch ( ours GS752TP ) that the access points plug into,  Tag the ports with the Vlan ID you created above, where your access points plug into as all as the port for the Uplink from the Switch to the Router

On your access points  ( Ours WNDAP360 ) create a new SSID and Tag these to the new VLAN ID

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