ZTNA

Hello,

Thank you for using the Community Forum.

I will seek to get you an answer or help. We will reply to this thread with an update as soon as possible.

Regards,

Hello,

Based on your description, looks like you are implementing:

https://docs.fortinet.com/document/fortigate/7.2.3/administration-guide/101256/ztna-tcp-forwarding-access-proxy-example

Your issue symptom has too many possibilities. Let's try to narrow it down.
Your first error: Forbidden: Wrong proxy service was requested
The web server reported that an error occurred while trying to access the website. Please go back to the previous page.
> This can possibly due to ZTNA cert somehow not ready in the endpoint. Check if your endpoint in EMS endpoint pane, 'ZTNA Serial Number' should be visible.

And for your vcenter error:

ZTNA Access Denied
The page you requested has been blocked by a ZTNA restriction.
Details: API Gateway Denied.

It can be due to misconfiguration on 'config api-gateway' part in FGT. Or the ZTNA destination in endpoint profile

config firewall access-proxy     edit "ZTNA-tcp-server"         set vip "ZTNA-tcp-server"         set client-cert enable         config api-gateway

Nevertheless, you can try below debug command in FGT and reproduce the issue:

CLI session1:

The output may give clues why it is not working.

Logs in ZTNA traffic will be helpful as well:
FGT > Logs & Reports > ZTNA traffic

Hello and thanks for your advice, I will try to replicate your content.
I'll update you as soon as possible.
Best regards