Some troubleshooting sessions begin with mysterious packet loss. Others begin with someone confidently explaining why the network is broken.
This one started with Steve.
Now, Steve wasn't just smart—he was scary smart. The kind of systems analyst who could explain operating system internals before most people had finished their first cup of coffee. If there was a technical acronym, Steve probably invented three more.
He called because file transfers were painfully slow.
"The network has to be the problem," he explained.
Naturally, I did what packet analysts do. I captured the traffic.
About a minute later, the mystery was solved.
The network wasn't the problem.
The servers weren't the problem.
FTP wasn't even the problem.
Steve had accidentally volunteered his own PC to become the
middleman for every single byte being transferred.
Instead of copying a file directly from Server A to Server B,
Steve had FTP'd into one system, Telnet'd into another, and launched the
transfer in a way that caused the data to flow like this:
Server A → Steve's PC → Server B
Every packet politely stopped by Steve's desktop before continuing
on its journey.
His computer had unknowingly become the world's least efficient
freight forwarding company.
No wonder the transfer was slow.
The fix took less time than the explanation. We simply showed
Steve how to start the FTP transfer directly between the two servers so the
traffic never touched his workstation.
Problem solved.
The best part?
While we were talking, Steve mentioned he was developing an
application that would eventually be deployed into production. Looking at the
design, I realized it was following the exact same "everything through
me" architecture.
Had it gone live, every production transaction would have taken
the scenic route through an unnecessary middleman.
Fortunately, we caught it before it escaped into the real world.
The Lesson
This is exactly why packet analysis is so valuable.
Logs might tell you a transfer is slow.
Monitoring tools might tell you a server is busy.
Users will certainly tell you "the network is slow."
But packets don't guess.
They show the exact path every byte takes, revealing problems that
no dashboard or log file can explain.
In this case, the packets solved the mystery in under a minute—and
saved a production application from repeating the same mistake.
Sometimes the network isn't broken.
Sometimes the network is just doing exactly what Steve told it to
do.
Ray Tompkins is the founder of https://Porifera.io
At Porifera.io, we help software teams become heroes. Our platform continuously watches over your applications, collecting billions of live data points to show you exactly what's happening, why it's happening, and how to fix it.
