Technical Tip: FortiManager configuration interfac...

Nour · 03-05-2025

Description This article explains how the port selection process is done under different port settings Scope FortiOS. Solution There are different settings that impact the criteria on which a new NAT port will be selected: If 'set port-preserve enabl...

Nour · 11-22-2024

Description The following article describes the potential causes of FortiAnalyzer's high lag-behind issue when logs are being sent from FortiAnalyzer to a syslog server. Scope FortiAnalyzer sends logs to a syslog server. Solution Behavior and Symptom...

Nour · 08-13-2024

Description This article describes the behavior seen when FortiGate IPSEngine enters fail open mode due to GRE traffic, causing high CPU and an increased load on the FortiGate. Scope FortiGate with pass-through GRE traffic that is IPS inspected/UTM e...

Nour · 06-19-2024

Description This article describes the behavior and changes of the 'Create address object matching subnet' option for different Interface roles via GUI/CLI. Scope FortiGate interface created with role LAN in v7.0+ via GUI/CLI. Solution The 'Create ad...

Nour · 05-10-2024

Description This article describes how the VDOM interface device configuration install works in Advanced ADOM mode (i.e. Each VDOM of the FortiGate resides on a separate ADOM on the FortiManager). Scope FortiManager: Configured in Advanced ADOM mode,...

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Technical Tip: NAT Port selection process criteria

Technical Tip: FortiAnalyzer lag-behind showing in logs

Technical Tip: High CPU/Failopen mode due to GRE traffic increasing IPSEngine load

Technical Tip: Create address object matching subnet option for different Interface roles via GUI/CLI