Do you have ritual before, during and after your certification exams? I was watching ESPN and thought to myself,
What if we treated an examination like a sports game?
So let’s say I finish my exam and hit “Grade” stand up from my chair, step aside and do the Tebow
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Currently, I’m reading the CCDA Official Certification Guide. I don’t plan on taking the actual exam. The book was primarily a way for me to increase my knowledge of network design. So far I think it is a fantastic read for someone that just passed their CCNA.
There’s plenty of little nuggets of information at a high level. Enough to get your feet wet in different tracks within Cisco certification.
It’s fairly easy to go through and you learn enough without getting overloaded with information. If you haven’t started on another track after CCNA then I would highly recommend going through CCDA just to get a good grasp of how Cisco wants you to design networks.
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I came across an article on Network World from Black Hat stating that OSPF has a serious vulnerability. A vulnerability so bad that in order to resolve it you either have to change routing protocols or change OSPF itself.
What I read from the article was that you would need to compromise a router, steal the encryption key, connect a rogue router on the network, become adjacent with your network routers and advertise false routes that would cripple your network.
I don’t think it is really a vulnerability in OSPF itself. The vulnerability requires that the rogue router be connected to the actual network. Now if an attacker was able to get his router onto your network then you have a few security issues there.
I’d like to see the presentation but I think this vulnerability is just the same as saying I can cripple a network with VTP. If an attacker has access to the victim’s network then he could damage the network much faster by connecting a switch compared to stealing encryption keys.
Either way, I’m interested in reading more about this.
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