Saturday, January 6, 2024

How to troubleshoot ForitOS Security Fabric issues.

=== before troubleshooting and to save your time === 

- please make sure that you are not using VDOMs (VDOMs cannot be enabled when Security Fabric is used) 

- Security Fabric does not support transparent mode.

- You have to have FAZ or FortiManager with the Analyzer feature enabled.

- Security Fabric cannot be enabled on the loopback, IV interfaces.

- Make sure that you have enabled the "FortiTelemetry" service (fabric service, each major FortiOS version might have a different naming) on corresponding interfaces (fabric upstream and downstream interfaces). 

- Make sure there is a connection between FortiGates (you can enable ping on the interface and try to ping).

- Ensure you have specified the valid IP addresses for the security Fabric connection.


=== Troubleshooting=== 

If so, please provide: 

[please create a log file of a session using PuTTY


Run the following commands on the SSH clients:

==== SSH1 (on core FG) ==== 

# show system global 

# show system csf 

# diag sys csf downstream 

# diag sys csf authorization 

# diagnose sys csf neighbor list 

# diagnose test application csfd 1 

# diagnose sniffer packet any 'host x.x.x.x and port 8013' 6 0 a >>>> x.x.x.x = ip address of the new FG there you have enabled "FortiTelemetry" 


--Real time debug-- 

diagnose debug reset 

diagnose debug application csfd -1 / 0 >>> to disable 

diagnose debug enable 


==== SSH2 (on non-core FG) ===== 

# show system global 

# show system csf 

# diag sys csf upstream 

# diagnose test application csfd 1 

# diagnose sniffer packet any 'host x.x.x.x and port 8013' 6 0 a >>>> x.x.x.x = ip address of the core FG there you have enabled "FortiTelemetry" 


--Real time debug-- 

diagnose debug reset 

diagnose debug application csfd -1 / 0 >>> to disable 

diagnose debug enable 

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