You are troubleshooting traffic traversing the SRX Series Firewall and require detailed information showing how the flow module is handling the traffic.
When troubleshooting packet handling on an SRX Series device, administrators need to understand exactly how theflow moduleis processing traffic. The most effective tool for this is theflow traceoptions feature.
Flow traceoptions:Provides detailed per-packet trace information showing each processing step within the flow module. It reveals how traffic is evaluated against session tables, NAT rules, and security policies. This is the recommended method for in-depth troubleshooting.
Why not the others?
Theflow session table(Option A) shows only active sessions and counters, not detailed step-by-step handling.
Theforwarding table(Option B) relates to routing and forwarding decisions, not flow security processing.
Firewall filters(Option D) can match and log traffic but do not display detailed flow processing steps.
Therefore, the correct method to get detailed information about flow handling is toenable flow traceoptions.
[Reference:Juniper Networks –Monitoring and Troubleshooting with Flow Traceoptions, Junos OS Security Fundamentals, Official Course Guide., , ]
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