Limited throughput on network devices is a common problem. We handle a lot of cases with thtroughput issues and have written a guide on how we recommend to start troubleshooting in such cases.
FortiGate throughput troubleshooting
CVE-2023-27997 – FortiOS & FortiProxy – Heap buffer overflow in sslvpn pre-authentication
Please note the vulnerabilities in Fortinet products published in June. In particular, we would like to mention the vulnerability in FortiOS, which affects SSLVPN access and poses a major threat with a CVSSv3 score of 9.2. Fortinet PSIRT: https://www.fortiguard.com/psirt/FG-IR-23-097CVE: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-27997 Affected are FortiOS versions 6.0 to 7.2. Fortinet has already…
FortiCloud: Check your email or token application for the security code
Fortinet has changed it’s SSO system underneith. Therefore, the shown message has changed. We have documented the new behaviour in this blog post: https://blog.boll.ch/fortinet-account-your-account-has-been-locked/ The single-sign-on accounts for Fortinet websites are used for sites such as support.fortinet.com and forticloud.com. There are a whole lot of other Fortinet sites that use…
Top 10 FortiGate mistakes we see in our daily support life
According to this title you are expecting some click-bait content, right? Nope. We’re still the Boll Engineering Tech team here… The configuration inputs below are problems we face frequently in our daily support life. Also some of the points mentioned below are frequently asked questions that pop up during our…
CheatSheet – FortiOS v7.2
We are happy to present you the new cheat sheet for FortiOS version 7.2. Most commands have remained the same.A bigger change is that the Packet Sniffer and the Debug Flow are now also available in the WebUI under Network > Diagnostics. We wish you good luck with troubleshooting.
FortiOS 7.0 and above not updating signature databases
Sometimes it happens, that FortiOS is not updating it’s antivirus signatures anymore. The monitoring software, a monitoring script or a very attentive administrator is then reporting this problem to the FortiGate admin to fix it. This guide will lead you through the steps to troubleshoot this.
FortiGate with FortiOS 7.2: First Configuration Steps
Last update: 28. April 2026 Have a look at our guides for FortiOS 7.4, FortiOS 7.6 and FortiOS 8.0. In our daily support work we often see FortiGates in use on which the basic settings like time zone, host name and so on have never been set correctly. Therefore we…
Fortigate: L2TP over IPsec configuration needs to be manually updated after upgrading from 6.4.x or 7.0.x
Fortinet has added a special note in the release notes of FortiOS 7.0 as follow: Source:https://docs.fortinet.com/document/fortigate/7.0.6/fortios-release-notes/927994/l2tp-over-ipsec-configuration-needs-to-be-manually-updated-after-upgrading-from-6-4-x-or-7-0-0-to-7-0-1-and-later Unfortunately the second point does not clearly state which policy exactly needs to be changed.Here is a screenshot of the changed policy: As you can see, the policy from the l2tp client to the…
FortiGate Custom Language
If you want to use custom languages on FortiGate generated websites, like the SSL VPN page, you can add additional self-made translation files to the FortiGate. Note at the beginning: This is a new feature under FortiOS 6.4.5 . It was available before but was not working. First you need…
Welches FortiOS empfehlen wir? (Deutsche Version)
Zuletzt aktualisiert: 09.09.2025 / This article is also available in english language. Die schnelle Antwort: Das für Ihren Fall am besten passende. So einfach könnte man unsere Antwort zusammenfassen. Es gibt keine Version, welche wir immer empfehlen können. Ausserdem unterliegt die FortiOS Software einer ständigen Weiterentwicklung. Daher haben wir einige…