Troubleshooting Tip: Downgrade of FortiOS fails du...

vtsonev · 12-19-2024

Description This article describes how to use new commands implemented in FortiOS 7.4.0 to troubleshoot high memory usage on FortiGate. Scope FortiGate 7.2.0 and later. Solution In case of a disk full issue on a FortiGate, starting from FortiOS 7.2.0...

vtsonev · 12-02-2024

Description This article describes how to use IPv6 ISDB objects in a firewall policy for SSL VPN dual-stack and is valid when using SSL VPN with the 'set dual-stack-mode enable' option. Scope FortiGate up to v7.0.X, v7.2.10,v 7.4.5 and v7.6.0. Soluti...

vtsonev · 11-08-2024

Description This article describes what are the downsides of using SSL VPN web mode compared to tunnel mode. Scope FortiGate v6.4.X, v7.0.X, v7.2.X, v7.4.X. Solution Some years ago most of the web pages were using static HTML. It is relatively straig...

vtsonev · 11-08-2024

Description This article describes a method to sync time and change the NTP configuration. Scope FortiSIEM 6.X, 7.X. Solution Incorrectly configured system time can lead to a range of issues, including: Communication issues between nodes. Incorrect e...

vtsonev · 10-25-2024

Description This article describes how to troubleshoot connection issues between Collector and Super/Worker due to mismatch/wrong MTU. Scope FortiSIEM v6.0 and above. Solution In some cases, the Collector can experience issues reaching or uploading d...

vtsonev · 03-15-2022

Hello, In order to give you answer of that question we will need some more details about your network and topology. Please contact sales representative in your region to discuss this topic. You can check the list here https://www.fortinet.com/corpora...

vtsonev · 03-14-2022

Hi, Have you tried to perform the changes on the Fortigate directly ? Is the same issue reproducible there, or it's only when you try from the Fortimanager? You mentioned in your first comment that delete via Fortimanager GUI works fine too, so as fa...

vtsonev · 03-14-2022

Hi Ramunas, Thank you for your update! I see what is the problem. Fortigate sniffer is capturing the packets when they are received in the CPU. The "in" incoming direction is not a decision on the Fortigate, so if you see wrong interface on incoming ...

vtsonev · 03-14-2022

Hi, Can you please share which Fortigate model you try to configure and which version OS of FortiManager you are using? Best regards, Vasil

vtsonev · 03-14-2022

Hi, Is your IPsec bounded to an loopback interface on the Fortigate ? If so, please make sure you have IPv4 policy to allow traffic between the loopback and the wan interface. Maybe would be easier if you can share with us the phase1 and phase2 confi...

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Technical Tip: How to troubleshoot memory usage with new commands starting from FortiOS 7.4.0

Technical Tip: Using IPv6 and IPv4 ISDB objects in dual-stack SSL VPN firewall policy

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Technical Tip: How to sync manually NTP on FortiSIEM

Technical Tip: Connection issues due to MTU between Collector and Super/workers

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