Troubleshooting Tip: Downgrade of FortiOS fails du...

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 · 07-28-2023

Description This article describes downgrade issues due to an enhanced BIOS-level signature and file integrity checking. A solution is offered. Scope FortiGate running BIOS version 5000100, 6000100, or newer. Solution If the FortiGate device is runni...

vtsonev · 06-03-2021

Description This article describes the reason why certificates cannot be removed.Solution Sometimes, it could happened that imported certificate needs to be deleted and the 'Delete' button is greyed out.First of all, check if there is any 'Reference'...

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...

User Statistics

User Activity

Technical Tip: Why SSL VPN web mode bookmarks are not working for all web applications

Technical Tip: How to sync manually NTP on FortiSIEM

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

Troubleshooting Tip: Downgrade of FortiOS fails due to BIOS check

Technical Tip: Unable to remove certificate: delete button is greyed out

Re: Need Help in choosing the best firewall model for my organization

Re: Fortimanager error 0 - invalid value

Re: Connection from Wifi (internet only) to VPN in the same router

Re: Fortimanager error 0 - invalid value

Re: Supposedly wrongly negotiated IPsec Phase 2 SA

Troubleshooting Tip: Downgrade of FortiOS fails du...

Technical Tip: Usage of BGP multipath and descript...

Re: ADVPN and SDWAN rules

Re: Connection from Wifi (internet only) to VPN in...

Re: Supposedly wrongly negotiated IPsec Phase 2 SA

Re: After factory reseting my fortiswitch 524D I ...

Re: allowing Internet to Vlan

KCS