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Written by Paul Stewart
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Wednesday, 17 December 2008 |
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Wednesday, December 17, 2008 it is! That is the day I passed my CCIE Written and the day I am officially considering the start my CCIE Security journey. At this point the focus will change and intensify. I know the lab is a completely different animal than the written exam. As a result, I am going to put all of my efforts into lab time and work through every conceivable scenario I can think of. |
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Written by Paul Stewart
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Thursday, 11 December 2008 |
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Cisco MARS is an interesting product. As compared to Cisco Works VMS, I find its monitoring capabilities far more complete and useful. I am fairly new to MARS and some of the concepts. That being said, the more I use it, the more useful I find it. However, there are a few items that I think could be improved on. Some of these items should be very easy to add into the web interface. Others I’m not completely sure how they could be accomplished, but would be nice to have. Items I would like to see... |
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Written by Paul Stewart
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Saturday, 06 December 2008 |
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It has been painfully obvious to anyone who has been following this site that new posts have been few and far between. In the beginning I had an idea of what I wanted this site to be. Unfortunately, I grossly underestimated the effort that was going to be necessary to get it up and keep it going. My desire was that this site becomes a resource where aspiring technicians and engineers can pick up a little bit of knowledge. I still have a strong desire to help people understand how things work, specifically protocols. |
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Written by Paul Stewart
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Thursday, 04 September 2008 |
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I have pondered quite a bit here lately on the impact of SSL or Secure Sockets Layer on our culture. It is used for nearly every eCommerce site including huge players like Amazon, eBay, Paypal, and Bank of America. There are no realistic alternatives for SSL and HTTPS for securing web nformation in transit. The beauty of SSL is the fact that it allows a web user to verify or authenticate that they are actually connecting to the web site that they think they are. It does this by using a list of trusted digital certificates that contain public keys that sign certificates that are presented by the web server.
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Written by Paul Stewart
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Wednesday, 20 August 2008 |
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Packet captures can often give us immediate insight into potential trouble spots on our networks. One of the biggest issues I find is having to get up from my desk, and possibly get in my car in order to get physically connected where I need to pull the packets from. One key place that we often need to look at packets is at the firewall. I have for some time knew about some of the capturing capabilities of the Cisco ASA. In the later code and ASDM (ASA Device Manager), this has become really user friendly. |
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Written by Paul Stewart
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Saturday, 16 August 2008 |
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Path MTU discovery is an often misunderstood aspect of networking. As we begin to really tighten the security of our networks, we must understand this process in order leave the network fully functional. Additionally, we may often come upon a situation where a network seems to work, but there are issues accessing a site. In any case, the Path MTU Discovery process is important to understand. |
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Written by Paul Stewart
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Saturday, 02 August 2008 |
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I recently had a conversation as to whether or not troubleshooting methodology could be taught or not. It is hard to change the way people approach problems. I do believe that in order to properly troubleshoot technological issues, it is very important that we have a structured approach. Too many technicians fall into the trap of simply changing things until they work. After a problem has been resolved, the engineer will likely not understand exactly what resolved the problem and may not understand the inner workings of the system any more than they did before the resolution. Structure can be achieved by understanding the layered approach in which systems communicate. The most common representation or model is the OSI model.
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Written by Paul Stewart
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Saturday, 19 July 2008 |
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Server virtualization has became commonplace over the past couple of years. Many organizations started out using VMWare and other virtualization products in lab environments and for utility type servers and workstations. Many virtual server deployments were implemented for internal web servers, ftp servers and other light use servers. As confidence increased in these deployments, more mainstream and business critical applications have made their way into the virtual environment. Since this is a progression over time, many organizations have not really considered the security ramifications of this shift in paradigm. |
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