Nathan_Grossenbach

New Member

Question

Significant Throttling over SSLVPN FortiClient

Forum|Forum|2 years ago
November 20, 2023
3 replies
4062 views

When our employees are using Forticlient VPN, their speeds are throttled extremely low. The speed across the employees is consistent at 10-12mbps. Off the VPN, several employees have 100-500mbps.

We use a FortiGate firewall device. I don't have any traffic shaping rules setup.

Is there anything else on the Fortigate that might be causing this issue? Traffic through the Fortigate - say at an office and not over VPN - has full throughput from the ISP.

Staff

@Nathan_Grossenbach

Try to disable dtls as per below link and check speed again:

Troubleshooting Tip: ‘SSL-VPN slow file transfer ... - Fortinet Community

Regards,

Nathan_GrossenbachAuthor

New Member

Hello thank you for the comment. I just want to confirm, ENABLE or DISABLE dtls to help with the speed?

Staff

disable

Nathan_GrossenbachAuthor

New Member

Thank you:

I ran

config vpn ssl settings
set dtls-tunnel disable
end

I unchecked DTLS in my client.

I am still throttled at 10-12mbps.

If I did something wrong, please let me know.

Thank you all!

Staff

Hi @Nathan_Grossenbach,

What are the versions of FortiGate and FortiClient? Do you have split-tunneling enabled?

Regards,

Nathan_GrossenbachAuthor

New Member

FortiClient is on 7.2.2.0864

FortiOS is v7.0.12 build 0523 (mature)

There is no split tunneling enabled.