Re: Token received in SMS but token field not show...

vpolovnikov · 01-23-2026

Description This article describes how to diagnose ZTNA error messages produced by FortiClient upon ZTNA connection failure. Scope FortiClient. FortiGate. ZTNA. Solution Whenever ZTNA connection fails, FortiClient presents a browser message that may ...

vpolovnikov · 01-22-2026

Description This article describes a solution for VPN connection failures due to frequent IP-address updates when on a mobile network. Scope FortiGate, FortiClient. Solution Most mobile networks do not assign a unique public IP to each device. Instea...

vpolovnikov · 12-05-2024

Description This article describes VPN log gathering for an optimal troubleshooting experience during technical support engagement. Scope FortiClient/FortiClient EMS, FortiGate, SSL VPN, IPsec. Solution When engaging with technical support, it is cri...

vpolovnikov · 01-22-2026

Unfortunately, there's no setting on FortiClient that explicitly defines what browser to use for SAML authentication. If external browser is configured on FortiClient for SAML authentication, it'll always open system default browser.

vpolovnikov · 01-22-2026

Came across an article that may be helpful? Token prompt not received for IPsec dial-... - Fortinet Community

vpolovnikov · 01-21-2026

Hey, jthomas. I'd ask your endpoint server admin if you actually need a site name of the endpoint management server (EMS). If you can't contact your EMS admin, try connecting without the site name (it'll connect to a Default site on EMS). Then, you'l...

vpolovnikov · 01-21-2026

It has to be a host check on the VPN portal as what you're seeing is a default FortiGate message when this check fails. Please refer to this doc: https://docs.fortinet.com/document/fortigate/7.4.2/administration-guide/32970/configuring-os-and-host-ch...

vpolovnikov · 01-21-2026

Hey Francesco, As AEK has mentioned, I'd recommend checking the RADIUS logs on the authentication server (i.e. FortiAuthenticator, NPS, etc.). In addition, you can check FortiGate GUI Event logs and search for authentication failures. It may give out...

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Technical Tip: Using ZTNA error code messages to diagnose ZTNA connection failures

Troubleshooting Tip: Addressing VPN connection issues due to frequent IP-address changes on LTE/5G mobile networks

Troubleshooting Tip: Collecting logs for addressing VPN connection issues

Re: Define the browser when authenticating