Forticlient VPN double NAT

[Fortilorz]

Hello Community,

i need help with double nat please. Fortigate 100F SSL VPN

Our Costumer cannot access our network through his Forti VPN client. The connection stops at 10%.

After investigations, the ISP informed us that they are using a double nat.

My question, what do I need to set on the Forticlient or Fortigate so that the VPN connection works.

I had never had such a case.
Thank you for your help

[Christian_89]

Change the FortiClient settings:
In the FortiClient, click the Settings tab.
Click the Advanced tab.
Select the Use NAT traversal check box.
Click Save to apply the changes.
Configure the Fortigate:
Open the Fortigate configuration from the CLI or the web interface.
Navigate to "VPN" > "SSL VPN Settings".
Activate "SSL VPN Tunnel Mode".
Click the "Advanced" button.
Select the "Use NAT traversal" checkbox.
Click "OK" to apply the changes.
Disable NAT on the Fortigate:
Open the Fortigate configuration from the CLI or the web interface.
Navigate to Network > Interfaces.
Select the interface on which the VPN connection is set up.
Click on the "Configuration" tab.
Uncheck the "Use NAT" option.
Click OK to apply the changes.

[Fortilorz]

Hello

Thank you for your message.

just a Question where do you mean in Forticlient by "Click the Advanced tab. Select the Use NAT traversal check box."

See the picture of Forti VPN Cleint below. I can't find the options

in Fortigate SSL VPN Tunnel Mode is already active.

but I can't find the other options---See the picture of Fortigate

regards

[Fortilorz]

Hello

we only have ssl vpn, do i need to set up ipsec vpn?

are these options only available in ipsec vpn?

but in Forticlient the options are also missing?

sorry for lot of questions

regards