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Well hello there, returning like a bad penny, I am here to talk again about Deep Packet Analysis. In my last series of blogs I talked about the use-cases for Deep Packet Analysis but conspicuous by it’s absence was a lack of real world applications. This time I thought I would dust off my old-timey packet analysis skills…
In my last post I looked at how flags can pull useful information out of packet that we otherwise we might struggle to see. This time, we’re going to use tcpdump to look into the actual applications. The first application I'm going to look at is the humble Domain Name Service (DNS), the thing that needs to work flawlessly…
In my last post, I took a look the DNS protocol with tcpdump; and as it turns out you can do some really useful stuff with the embedded protocol decoders. So, how far can we take troubleshooting with tcpdump? Well pretty far; but in troubleshooting you have to decide whether the fastest resolution will come from the tools…
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