iperf-grpc-tcpdump

Synchronized packet capture across distributed firewall nodes is automated by triggering server-side gRPC captures and dual-interface tcpdumps simultaneously. This coordinated traffic generation captures a synchronized view of traffic across LAN, WAN, and server endpoints to identify where packets are dropped or modified.

Throughput degradation and TCP resets in userspace dataplane environments often stem from packet corruption or tuple modification. Running iperf3 tests alongside multi-point packet capture helps isolate exactly where packets are being dropped or modified across the network path.

Debugging packet corruption in a userspace firewall environment is best handled by automating synchronized network performance testing and multi-point packet capture. This approach pairs iperf3 throughput analysis with simultaneous tcpdump captures to pinpoint corruption locations.

Yes, incus, grpcurl, and iperf3 are required dependencies to execute coordinated traffic generation and diagnostic data collection. These tools enable the automated capture orchestration and performance analysis needed for synchronized network debugging.

Yes, iperf3 tests are run during the live capture process to generate a summary of throughput, retransmits, and interval statistics. This performance analysis runs concurrently with dual-interface tcpdumps on the active firewall.

Synchronized network debugging should be used when diagnosing throughput collapses, TCP resets, or packet corruption within userspace dataplane environments. It is specifically designed for complex firewall setups where identifying the exact point of packet drop or modification requires multi-point visibility.