Some bytes further our pka file is red and closed by the readAll and close function (inherited from QIODevice).Ġ040E3CA FF15 C4FB8D01 CALL DWORD PTR DS:Ġ040E3D0 C645 FC 03 MOV BYTE PTR SS:,3Ġ040E3D7 FF15 0CFC8D01 CALL DWORD PTR DS: After putting some breakpoints on library file management functions, (if we look at the PT's directory we can see that is uses QT4 dlls see for file management under QT4), our pka file is open at (if we open it by the way of the "open - recent files")Ġ040E3B2 FF15 F4FB8D01 CALL DWORD PTR DS: I've spend quite a lot of time reversing PT but we will go straight to the point ^^. Launch PT (Packet Tracer) and attach Olly to it. (I'm using OllyDbg for the reversing/debugging that follows.) Let's look at how packet Tracer handles those files and see if we can get them clear without knowing the activity wizard password. If you try to open a *.pka file, you won't be able to read anything in clear. I'm using the version 5., so the described method might change in the future version. Well I'm gonna show you how to read those *.pka file, which contains the lab, cuz if you can read it you have all the responses =) and the corresponding grade ^^ =D You can create your graded lab (*.pka file), give it to your students and after a pre-defined time in the lab get it back and Packet Tracer will give you the grade of the student according to the configurations he made on lab's network, nice isn't it? One the new function (I don't remember it when I used Packet Tracer, may be it already existed before ^^) is the activity wizard. I used Packet Tracer some years ago, and the new version has quite a few new functions. During those courses his students have to do some labs (configure router&switches, to apply the CCNA curriculum) using the rack we have or Packet Tracer (a tool from Cisco to simulate a Cisco network and train yourself, at configuring the devices). I have a friend who's teaching Network courses at our school.
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March 2023
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