Category Archives: Cisco

Summary of Cisco NX-OS security vulnerabilities I uncovered

I reported various vulnerabilities in NX-OS back in 2011, in various posts on my blog: Hacking NX-OS Part 1 Hacking NX-OS Part 2 Hacking NX-OS Part 3 These were follow on’s to a series of posts I made about getting … Continue reading

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Hacking NX-OS Part 3

Some notes from when I first started hacking away at NX-OS in 2011: Basically the Nexus underlying operating system, made by MonteVista, which was formally called Hard Hat Linux (a hardened version of Red Hat Linux).  I can tell you … Continue reading

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Hacking NX-OS Part 2

You can see in my previous article, that I used the “bash” command.  In later NX-OS versions this was not possible.  After rooting the box, I spent a lot of time learning about all of the shell scripts and binaries … Continue reading

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Hacking NX-OS Part 1

Some of you may know me as a sage hacker from the mid 80’s to the early 90’s.  Although, if you met me after 1994, most of you probably don’t know that about me at all.  It was a previous … Continue reading

Posted in CCIE Routing and Switching, CCIE Storage, Cisco, Network Technology, Nexus, NX-OS | Tagged , | Leave a comment

Cisco MDS and Brocade Interop Issues with Per VC Flow Control

One issue to be mindful of when configuring Cisco MDS switches with Brocade switches is that Brocades Per VC Flow Control must be disabled.  Cisco MDS 9000 switches do not support Brocades Per VC Flow Control.  The flow control will … Continue reading

Posted in CCIE, CCIE Storage, Cisco, Interop, MDS | Tagged , , | 3 Comments