Last updated: 05.06.2026 at 15:30 CEST In the past few days, multiple of our resellers have reported issues where DNS resolution using the default Fortinet FortiGuard DNS servers (96.45.45.45 & 96.45.46.46) is not functioning as expected with DNS over TLS (DoT) on TCP/853.
We encountered an interesting — and quite disruptive — behavior in a High Availability (HA) setup. Situation Overview When restoring a configuration on one cluster node, the entire configuration of the other nodes was overwritten — including settings that are supposed to remain unique and unsynced, such as hostnames, management…
We have updated our CheatSheet for the FortiAnalyzer/FortiManager to the OS version 7.4. We still have the divided sections for FortiAnalyzer Logging, FortiAnalyzer Reporting and FortiManager with all of our regularly used commands and some CLI-based debug examples that are also featured in the official training materials. We hope that…
We have updated our cheat sheet for Palo Alto firewalls with all important commands for troubleshooting.It contains now all commands for PANOS 11.1. We have divided the cheat sheet into different sections like general commands, session debugging, service debugging and feature related debugging commands so that the needed commands can…
When configuring the Border Gateway Protocol (BGP) Router, you may encounter issues where dynamic routing doesn’t work as expected due to configuration problems. This article provides a handy set of troubleshooting commands to address these issues effectively.
In the last days we have had several support cases that suspiciously all had the same error description: many web servers can no longer be reached with the Chrome or Edge browser. In our cases typically the Webfilter feature from one of our firewalls has been involved. Right now we…
Last Updated: 29. January 2025 From time to time we face performance problems on FortiGate units in our daily support life. Most often the impacts of performance problems on the FortiGate are not typical. Or let’s say “not as an admin that is not familiar with FortiGates would expect”. The…
In this post we want to share some of the most seen reasons for slow performance on FortiGate appliances with you. This are experiences we’ve made in our support department and is not a concluding list.
We are happy to present you the new cheat sheet for FortiOS version 7.4.If you have an idea for the cheat sheet, please let us know in the comments. (Updated to v1.2, 17.02.2025) We wish you good luck with troubleshooting.
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.
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