Overview
Network debugging fails when engineers jump to application-layer debugging for problems that are infrastructure-layer failures. An SSL certificate error requires a certificate fix — not a code change. A DNS resolution failure requires a DNS configuration fix — not a retry policy in the application. Diagnosing network problems layer by layer (DNS → TCP → TLS → HTTP → application) identifies the correct layer where the fix belongs and avoids application-layer workarounds for infrastructure problems.
The Network Debugging Framework diagnoses network problems in layer order, using the specific tools for each layer, to identify the exact failure point before any fix is implemented.
Key Features
Layer-by-layer diagnostic commands
openssl certificate expiry and chain verification
curl timing breakdown (DNS/Connect/SSL/FirstByte)
Intermittent failure capture loop