The Network Capture Playbook Part 3 – Network cards

One of the most common answers that come to my mind when being asked questions during or after a talk at a conference is the famous phrase “it depends…”. This may sound unsatisfactory at first, but the problem with a lot of questions regarding network analysis (and packet capture) is that there are always so many things to consider. So when we’re talking about using a standard network card like they are built into most PCs and laptops these days, the answer to the question of “is it good enough to capture packets?” is – you probably guessed it already: “it depends”.

Trace File Case Files: SMB2 Performance

We had an interesting question regarding SMB2 performance on the Wireshark Q&A forum recently. Upon request the person asking the question was able to add a couple of trace files (=”capture” files).  The question and a link to the traces can be found here:

https://ask.wireshark.org/questions/55972/slow-writes-even-slower-reads-spanning-wan-to-netapp

Since the question nicely fits into the scope my talk on Sharkfest Europe last week I have asked the attendees to take a look at the question. For the next days the number of views increased significantly. So, here are my 2 cents.

The Network Capture Playbook Part 1 – Ethernet Basics

Capturing network packets is the first step in any kind of network analysis or network forensics situation. Few people ever consider this an important step, but this is really where the analysis result can be heavily distorted if you’re not careful. During Sharkfest 2016 I talked about how important the capture process and it’s preparations are, and decided to start a series of blog posts about how to do network packet captures. So here we go with the first one, starting with basic network capturing in a wired environment.

My packet analysis toolset

As any analyst (regardless of the topic being networks, IT security, forensics etc.) will tell you, it’s almost always a combination of tools that is used to get the results. And since I thought it might be useful, here’s my list of what I primarily use when analyzing packets.

Sharkfest 2016 recap

Another Sharkfest has come and gone, and once again it has been a great conference. If you’re into packet analysis, network forensics or network troubleshooting there is no other event that has the same density of information. It’s really a “specialist” conference, in a very open and friendly way, and newcomers are always welcome.