fortigate 30e slow speed internet over wifi

[nomard_ar]

Dear Fortinet Community,

We are a small team of 15 people using a FortiGate 30E firewall and a D-Link DIR-2680 Wi-Fi router. 

We have two SSIDs. Lately, Wi-Fi speeds on both networks have been slow. The ISP technician confirmed the wired LAN speed is good, but Wi-Fi speeds are much lower. They suspect the FortiGate 30E might be affecting the throughput.

When I tested the Wi-Fi, I got 364 Mbps download but only 12 Mbps upload, which seems low for our 500 Mbps plan.

Could the firewall be limiting the speed? How can we check and fix this? Also

• How do I see the actual output speed the firewall is providing right now?

• If the speed is low, what could be the possible reasons for this?

• If the speed cannot be improved, what is stopping it from being faster?

• If the speed can be improved, what changes ?

Thank you in advance for your support.

[knaveenkumar]

Hi team .

step1:
bypass firewall and connect to isp port check the speed.
step2

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connect directly one laptop with lan port and check the status 

step3
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The port  is connected to switch is the same port for lan and wifi, if yes , then check the lan users speed its getting good then you need to check with wifi device 
incase if they are not getting the speed on both lan and wifi then you need to check the speed and duplex setting on the both ends

-Naveen