As architectures shift toward microservices, visibility becomes a primary challenge. Logging is often the first line of defense, yet traditional approaches frequently miss the mark during critical system moments. The Challenge with REST APIs When important data is tucked inside various headers and request bodies, logging every full exchange becomes far too verbose. Developers must constantly balance missing data against drowning in it . That's why we need to capture traffic "just when needed" . However, typical network sniffers won't help if you're looking for HTTP headers or SMTP commands. You need a tool that can reconstruct the TCP flow - not just capture fragmented packets. We will introduce justniffer - a powerful tool that traces TCP traffic by rebuilding the stream flow. This gives us the flexibility to inspect application-layer protocols without struggling with post-processing TCP stream reconstruction.…