Technical Tip: FortiGate is entering into Conserve...

vpalli · 09-02-2025

Description This article explains the underlying causes of multicast forwarding delays observed on FortiGates. It focuses on the coordination between kernel space and user space processes, especially in Linux/Unix-based systems, such as FortiGate, wh...

vpalli · 08-07-2025

Description This article provides an overview of interface error packet counters on FortiGate interfaces. Scope FortiGate. Solution In the output of the command diagnose hardware deviceinfo nic : Sample Output: diagnose hardware deviceinfo nic port10...

vpalli · 07-15-2025

Description This article explains how FortiGate calculates DNS latency for its configured system DNS servers. Scope FortiGate. Solution As part of measuring latency to system DNS servers, FortiGate adds a penalty if a DNS request needs to be retired,...

vpalli · 06-05-2025

Description This article describes an issue where ADVPN shortcut tunnels may fail to establish, or the parent tunnel may terminate after a few IKE message retransmissions, caused by either a misconfigured Virtual IP entry or a DENY local-in-policy fo...

vpalli · 02-03-2025

Description This article addresses an issue where FortiGate presents an error 'Can not create query, check_create_cmf_query, firewall' after the firmware upgrade to v7.4.3 or higher. Scope FortiGate. Solution Before upgrading to v7.4.3 or higher and ...

vpalli · 11-23-2021

Please check if the logs are displayed from CLIhttps://kb.fortinet.com/kb/documentLink.do?externalID=FD40417Also, you can generate test logs using the command #diagnose log test to verify if the logs are really generated and saved into Disk/Memory.

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Technical Tip: Understanding Multicast Forwarding Delays in Firewalls Due to kernel and User-Space Coordination

Technical Tip: Understanding Interface Error Packet Counters on FortiGate

Technical Tip: How FortiGate Calculates and Penalizes DNS Latency for its System DNS Servers

Technical Tip: ADVPN shortcuts fail to establish due to a misconfigured Virtual IP or Local-In-Policy

Technical Tip: Error 'Can not create query, check_create_cmf_query, firewall, and ippool_grp' is Displayed on FortiGate Console

Re: Forward traffic, web filter, local traffic, sniffer traffic are not displayed

Technical Tip: FortiGate is entering into Conserve...

Troubleshooting Tip: Error 'No RPF neighbor' when ...

Technical Tip: Understanding Multicast Forwarding ...

Technical Tip: End User traffic may be dropped on ...

Technical Tip: Important Changes to Traffic Shapin...

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