Site Reliability Engineer
Why I need to run tcpdump with cron? Sometimes problems happens while we are sleeping and disappear without any intervention in the morning. Unfortunately we are missing diagnosis data to drive the proper root cause analysis. And of course even we are praying that those problems don’t come back, they will come back. So prepare…
What is tcpdump? In the manpage the entry sentence of the description describes it in good words “… Tcpdump prints out a description of the contents of packets on a network interface…” It will help you to capture each network in-going and out-going packet on your interface and display it directly on your command line…
You open your file and it takes a long time to load because Wireshark is slow? I had the same problem even with very small files (1 MB). From one day to the other my Wireshark just wasn’t able anymore to do it fast. I was reading several forum for 2 days (I didn’t spend…
What is the Goal of finding IP Top Talker? In my previous post I gave you 5 tips for analyzing packet captures. In some cases it is necessary to identify which IP’s are talking the most in our network. Sometimes we suffer from a network slowdown or we see a spike in our bandwidth usage….