Network trace analysis tricks III – How can I comment on packets in a network trace

After you get familiar with using protocol analysis tools like Network Monitor or Wireshark, you’ll get to the most important stage in network trace analysis: How can I comment on packets sent or received in a network trace? Was it normal to see that packet being sent or received? What packet should I have seen…

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Network traffic capturing hints

In this post, I would like to talk about some important points about network capturing. If a network trace is not collected appropriately, it won’t provide any useful information and it will be a waste of time analyzing such a network trace.   Additionally, just collecting the network trace isn’t sufficient if you intend to…

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When do we need to collect network traces?

Many Microsoft support engineers dealing with customer technical issues ask for network traces to further troubleshoot and isolate a given problem. In this post I wanted to give you an idea about when we generally ask for a network trace so that you might want to take a similar approach for similar problems.   May…

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Getting HTTP 500 Internal server error when accessing a published web site through ISA 2004

In this post, I’ll be talking about a web publishing problem and how I dealt with it. The problem was that external clients were failing to access an internal Web server published on ISA 2004 server with HTTP 500 internal error. As usual, I asked the following logs from our customer when reproducing the problem:…

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Outlook MAPI connection to Exchange 2010 CAS fails through UAG 2010 direct access tunnel

In a recent case, I dealt with an Outlook MAPI connection failure problem through direct access tunnel (configured with UAG 2010) and I’ll be talking about how I troubleshooted this issue in this post. The problem was reported as Outlook 2010 clients were failing to access Exchange 2010 servers that run behind a UAG 2010…

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PDF file corrupted when downloaded through TMG server

Recently I dealt with a problem where PDF file downloaded from a certain external web site was always corrupted and I would like to talk about how I troubleshooted that problem. The client was connected to internet through a four node TMG 2010/SP2 array. We decided to collect the following logs to better understand why…

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