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diagnose sniffer packet any 'host 8.8.8.8' 4 4 lĭiagnose sniffer packet any 'host 8.8.8.8 and dst port 53' 4 10 aĭiagnose sniffer packet wan1 'dst port (80 or 443)' 2 50 l You can either use the GUI or the CLI to run packet captures. It is always a good habit to run diag sys session filter ? to list the filter you have configured.
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With this filter, you can clear the sessions based on the filter you created by issuing the diagnose sys session clear NOTE: Without the filter in place, you will clear ALL sessions on the FortiGate. Use the filter that work for you from a source or destination as well as ports You can also see the sessions using the following commands diagnose sys session filter clearĭiagnose sys session list #show the session table with the filter just set In the output, it will show you what interface the connection came in on, because of the function-name enable you will see NAT, Routing, etc, IPS, offloading to NPU and SPUs, etc. When complete, you can disable manually with Now I will show a flow trace from my computer to 4.2.2.2 diagnose debug resetĭiagnose debug flow filter saddr 10.22.22.122ĭiagnose debug flow filter daddr 10.100.1.1ĭiagnose debug flow show function-name enableĭiagnose debug flow trace start 100 #display the next 100 packets, after that, disable the flow: You can do that with the standard exec ping %host% however sometimes, you may want to source the ping from the inside interface or dmz interface. Sometimes you want to perform a straight ping to test connectivity from the firewall to a remote access VPN device. In the example, 32KF means the system is using 32 shared memory pages.įinally, you may need to trace connections and/or do some packet captures here are two examples of that. KF is the total shared memory pages used.
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In the example, 25F means there is 25 Mb of free memory. In the example, 123T means there are 123 Mb of system memory.į is free memory in Mb. T is the total FortiOS system memory in Mb. In the example, 98I means the CPU is 98% idle. In the example, 0S means 0% of the system processes are using the CPU. S is % of system processes (or kernel processes) using CPU. In the example, 0U means 0% of the user space applications are using CPU.
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U is % of user space applications using CPU. Once the TOP screen is displayed, you can use the letters below to filter the output differently. On the command line, you can use the following methods and commands Viewing Performance Settings on FortiGate CLI You can log into the FortiGate and under the Dashboard, set the time rage filter to 24 Hours for Memory, CPU and even Sessions Viewing Performance Settings on FortiGate GUI
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(Make sure to disabled after troubleshooting) Set the Log Level to Debug to ensure the highest verbosity.The commands above will troubleshoot authentication on the FortiGate Gathering FortiClient Logs This will be useful to provide to TAC if needed. Set the terminal to capture the output to a file. You can run them from the GUI Console screen or by using your favorite terminal application (e.g. Here are some troubleshooting commands for the SSL VPNs on the FortiGate. 98% – corruption of services/often resolved by reinstalling the client on the laptop. 40% – Application or the Fortigate causing the error, occasionally caused by the local machines/network setup Percentage and Possible Issue - 10% – Local Network/PC issue Troubleshooting FortClient VPN Connectivity Issues with FortiGateĪs more and more users are using remote access VPNs and probably using FortiClient, I wanted to share the errors you are encountering based on the percentage when it fails and some troubleshooting steps around Remote Access VPNs.