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Bruderer Research GmbH

Computer Communication Competence

IGMP Snooping Querier with Managed FortiSwitch

  • Post author:Peter Bruderer
  • Post published:30.07.2020
  • Post category:Fortinet/TCP/IP

⇒Here I wrote how to configure a FortiGate with managed FortiSwitches as IGMP querier. It is a good solution if the multicast traffic has to pass the FortiGate. If the multicast…

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IGMP Querier with Managed FortiSwitches

  • Post author:Peter Bruderer
  • Post published:26.07.2020
  • Post category:Fortinet/TCP/IP

If you need to configure an IGMP querier on managed FortiSwitches, you find nothing in the documentation. Once you know how it works, it is very simple. The interface of…

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FortiGate “Deny: DNS Error”

  • Post author:Peter Bruderer
  • Post published:24.03.2019
  • Post category:Fortinet

Fortigate firewalls do inspect the data stream. This is also true for DNS (Domain Name Service). Sometimes you will see the error:  "Deny: DNS error" in the logs Having a…

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Format FortiGate diag sniffer packet for Wireshark

  • Post author:Peter Bruderer
  • Post published:30.07.2018
  • Post category:Fortinet

On FortiGate firewalls you got the command: diag sniffer packet [interface] '[filter]' [verbose level] [count] [tsformat] Details you find ⇒here. If you just want to verify, if a packet passes the…

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Dump FortiGate Config into TXT, CSV or HTML

  • Post author:Peter Bruderer
  • Post published:28.05.2018
  • Post category:Fortinet

Sometimes you need to document your firewall rules. To do this, I wrote a perl-script to create a CSV file. Importing CSV into a spreadsheet is a good way for…

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Fortigate Firewall Traffic Processing Troubleshooting

  • Post author:Peter Bruderer
  • Post published:10.03.2018
  • Post category:Fortinet

Traffic Processing Application Debugging diag debug application  shows what happens during the execution of a process. Detailed information is shown. Debug level is a bit mask. diag debug application [application…

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