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GiannisChari
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Staff
‎08-29-2025
Last activity: Aug 29, 2025 3:54:43 PM
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Technical Tip: IKEv2 dial up VPN with LDAP and Certificate as second factor

08-27-2025
Description This article describes how to properly set up and troubleshoot a dial-up VPN with LDAP authentication on Active Directory and User Certificates provisioned by the Active Directory Certificate Authority server to endpoints. This can only b...

Troubleshooting Tip: Signature verification failed on IKEv2

07-31-2025
Description This article analyzes some special cases where 'Signature verification failed' appears on IKE debug. Scope FortiGate, FortiClient, 3rd party dial up software. Solution A brief explanation of how signature verification works, after encrypt...

Technical Tip: IKEv2 dial up VPN with LDAP authentication

06-02-2025
Description This article explains the configuration required for IPsec dial-up on FortiClient to work with LDAP users. Scope FortiClient, FortiGate. Solution IKEv2, in contrast to IKEv1, uses EAP for authentication. When hash-based EAP-MSCHAPv2 (defa...

Technical Tip: Native MacOS dial up VPN split tunnel

05-19-2025
Description This article analyzes why split split-tunnel MacOS native dial-up VPN does not work on the default Mac settings. Scope FortiGate, MacOS. Solution ISAKMP is the protocol used to negotiate the tunnel on dial-up IPsec. After the first exchan...

Troubleshooting Tip: FortiClient SSL-VPN blocks at 89%. Error (-5053) or (-5052)

02-11-2025
Description This article describes why sometimes FortiClient fails to connect to FortiGate and it returns -5052 or -5053 error codes. Scope FortiClient, SSL VPN. Solution When establishing an SSL VPN tunnel to FortiGate, at 89% FortiClient will attem...
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