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jcovarrubias
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Staff
‎11-28-2025
Last activity: Nov 28, 2025 4:38:12 PM
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Technical Tip: IPsec VPN tunnel fails to establish between FortiGate and SonicWall with 'ignoring unsupported INFORMATIONAL message' error

11-26-2025
Description This article describes how to troubleshoot IPsec VPN tunnel establishment failures between FortiGate and SonicWall firewalls after migration from SonicWall to FortiGate using FortiConverter. Scope FortiGate and SonicWall with IPsec Tunnel...

Troubleshooting Tip: FortiLink: Interpreting FortiSwitch 802.1X logs, successful vs failed (bad password) authentication

10-07-2025
Description This article explains the most important logs to identify a bad password in 802.1x user-based authentication in a switch managed by the FortiGate (FortiLink). Scope FortiSwitch (FortiLink), FortiGate. Solution Review of the Authentication...

Troubleshooting Tip: Conserve mode triggered by node process memory leak in FortiOS 7.4.8 and 7.6.3

09-11-2025
Description This article describes a memory leak issue in the node process on v7.4.8 that can trigger conserve mode. Scope FortiGate v7.4.8 and v7.6.3. Solution Background: Conserve mode occurs when memory utilization exceeds the configured value und...

Technical Tip: Understanding SD‑WAN parent and child application classification behavior

09-08-2025
Description This article discusses the differences between parent and child signatures in SD-WAN application matching when using application groups and then outlines configuration strategies. Scope FortiGate with SD-WAN. Solution Why SD‑WAN rules tre...

Technical Tip: How to release a DHCP IP address when FortiGate is DHCP Client

07-16-2025
Description This article describes how to release an IP address when FortiGate is the DHCP client. Scope FortiGate. Solution When switching FortiGates, certain ISP providers require the FortiGate to release the DHCP address to assign the same IP to t...
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