Lab 4#1207
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…apture + Bonus pending Signed-off-by: Aleksandr <55945487+Dekart-hub@users.noreply.github.com>
…rHello/cert chain via openssl -trace) Signed-off-by: Aleksandr <55945487+Dekart-hub@users.noreply.github.com>
…ce.txt Signed-off-by: Aleksandr <55945487+Dekart-hub@users.noreply.github.com>
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Goal
Trace one
POST /notesend-to-end withtcpdump/curl, debug a broken deploy outside-in, and decode the TLS handshake — done on macOS (the spec is Linux; adaptations are documented).Changes
submissions/lab4.md— full write-up: Task 1 (annotated packet trace + 5 debug commands + 502 reflection), Task 2 (port-conflict reproduction, outside-in chain, blameless postmortem), Bonus (TLS 1.3 handshake decode), and a macOS↔Linux adaptation table.submissions/lab4-trace.txt— thetcpdump -Acapture of the traced request.Testing
POST /notes→201 Created→ two-sidedFIN, over the IPv6::1loopback (lab4-trace.txt).listen tcp :8080: bind: address already in usereproduced; outside-in chain walked (lsof/curl/dig); repaired and re-verified (/health→ 200).:8443 → :8080;openssl s_client -trace→ TLS 1.3 /TLS_AES_128_GCM_SHA256, self-signed cert chain decoded.Checklist
git log --show-signature)submissions/lab4.mdupdated