Technical Tip: Getting 'The product serial number ...

Pavan_Chintha · 07-20-2025

Description This article describes the meaning of this 'malformed responder cookie' and whether to consider it as an error or not. Scope FortiGate. Solution In the IPsec VPN:In IKEv1 Main Mode, six messages are exchanged between two peers to establis...

Pavan_Chintha · 06-17-2025

Description This article describes how to handle an issue where an admin user with a super_admin_readonly administrator profile cannot run diagnostic commands in the CLI. Scope FortiGate v7.4.x and above. Solution While creating an admin user account...

Pavan_Chintha · 05-19-2025

Description This article describes a scenario where an IPsec Dial Up Tunnel is configured in the FortiGate using the IPsec Wizard Template, and while connecting to the IPsec Dial Up VPN from the FortiClient, getting 'Timeout while connecting to ' err...

Pavan_Chintha · 04-11-2025

Description This article describes a scenario where the backup configuration using SFTP is failing via the IPsec Site-to-Site VPN in policy-based mode. Scope FortiGate. Solution From the CLI, administrators have the option to backup the configuration...

Pavan_Chintha · 02-14-2025

Description This article describes how to resolve an issue while setting up FortiGate where the user is trying to activate the FortiGate in the GUI and the user has already registered on the Support Portal. Trying to activate results in the error: 'T...

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Technical Tip : understanding 'malformed responder cookie' in the IKE debug logs

Technical Tip: Unable to run diagnostic commands in FortiGate CLI for an Admin user with super_admin_readonly Profile

Technical Tip: Getting 'Timeout while connecting to <remote_gateway_ip>' error while connecting to IPsec Dial Up VPN

Technical Tip: Back up configuration using SFTP issue via the IPsec Site to Site Tunnel in policy based mode