Troubleshooting Slow FTP Uploads – PacketBomb

 Troubleshooting Slow FTP Uploads

By Kary | case study

Nov 29

Here’s a case study from email subscriber Peter in troubleshooting slow FTP uploads. Scenario:

The video team uploads video files via FTP to The Cloud and after a recent firewall replacement, the performance has dropped off by a large amount

Now, Peter had already figured out the issue so kudos to him. He even said his team doesn’t deal with these types of performance issues all that often so having found my videos and write ups, he was able to diagnose the issue. Big Ups, Peter! Big Ups, me too!

His question was around the why. He sees the how, but wanted to know more about the why so that’s what we look at in this new PacketBomb case study.

Page referenced: Understanding Throughput and TCP Windows

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About the Author

I like being the hero. Being able to drop a bucket of root cause analysis on a burning network problem has made me a hero (to some people) and it feels real good, y’all. Get good at packet analysis and be the hero too. I also like french fries.

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(3) comments

Randy May 20, 2016

How did you set up all the columns for this video?

BlackKnight October 29, 2020

Fantastic demonstration of understanding TCP performance issues! Thanks for taking your time in making this video!

Dimitris December 29, 2020


So I understand that the problem with slow ftp is the tcp window size.
How I can change it in windows server 2019

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