Troubleshooting tip: Error 'No route exists from s...

mle2802 · 10-18-2025

Description This article describes how to troubleshoot the issue with certificate warning when using a public CA signed certificate for captive portal. Scope FortiGate. Solution In this scenario, the captive portal is configured for WiFi SSID using S...

mle2802 · 10-14-2025

Description This article describes how to troubleshoot issue with resolving internal DNS queries. Scope FortiGate. Solution Follow the steps in this document to configure FortiGate as a DNS server FortiGate DNS server | FortiGate / FortiOS 7.6.4 | Fo...

mle2802 · 09-16-2025

Description This article describes how to troubleshoot the 'not secure' browser error that appears when accessing the FortiGate GUI. Scope FortiGate. Solution When accessing FortiGate GUI for management, the error 'not secure' is observed on the brow...

mle2802 · 09-08-2025

Description This article describes a solution for the issue where the VPN profile is not saved when initially configuring the VPN profile on the FortiClient VPN-only version. Scope FortiClient VPN-only version. Solution After configuring and saving t...

mle2802 · 08-06-2025

Description This article describes how to identify the source FortiGate which triggers the email-based 2FA request for admin login. Scope FortiGate. Solution FortiGate is configured to use email based two-factor authentication for admin login using t...

mle2802 · 12-31-2024

Hi @tunhiama,Did you see the connection on FortiGate or traffic from the client?

mle2802 · 12-30-2024

Hi @rlewcosa,You can try this document to overcome the duplicate subnet issue https://community.fortinet.com/t5/FortiGate/Technical-Tip-How-to-configure-an-IPsec-tunnel-with-Overlapping/ta-p/242267Regards,

mle2802 · 12-27-2024

Hi @baqir,You can download the installer for older version at support.fortinet.com. Navigate to firmware download and choose the correct product. Please refer to this document https://community.fortinet.com/t5/FortiGate/Technical-Tip-How-to-download-...

mle2802 · 11-25-2024

Hi @Marcos_FDS1012,In case FortiGate on this side is doing DHCP, you can specify DNS server as remote side so you do not need to manually specify DNS.Regards,

mle2802 · 11-22-2024

Hi @HyTronix,You can refer to this document for more information https://community.fortinet.com/t5/FortiGate/Technical-Tip-Implement-Source-NAT-for-IPsec-interface/ta-p/224533

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Troubleshooting Tip: Prevent certificate warning when using public CA signed certificate for captive portal

Troubleshooting tip: Internal DNS queries are not resolved when FortiGate is used as a DNS server

Troubleshooting Tip: Browser error 'Not secure' when accessing FortiGate GUI

Technical Tip: VPN profile is not saved after initial config with VPN-only version

Troubleshooting Tip: Identifying which FortiGate trigger email based two-factor authentiction for admin login

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Troubleshooting tip: Error 'No route exists from s...

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Re: Policy Question - NAT IP Pool

Re: VPN IPSec - DNS

Re: Firewall blocked Fortinet Single Sing On Agent...

Re: Fortinet images turn on and off in EVE-Ng

Re: Fortinet images turn on and off in EVE-Ng

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