• CCNA,  Cisco,  Cloud,  Network Infrastructure,  Networking,  PersonalBlog

    Re: Cisco NAT

    January 27, 2021 /

    Notes regarding NAT; Network Address Translation The goal of NAT is to obfuscate addresses. Either source or destination addresses, and either inward or outward bound traffic. In order for NAT to work, it needs to be told several things. ============== 1 What source address(s) to use 2 What destination address(s) to use 3 What interface is considered the inside of a gateway 4 What interface is considered to be the outside of a gateway 5 Which of these ‘sides’ to obfuscate ============== Some of these items can inferred, while some must be explicitly provided. Take for instance a typical situation: One external IP address provided from the ISP with many…

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    A CISCO Lab

    December 26, 2020
  • CCNA,  Cisco,  Command Line,  Network Infrastructure,  Network Lab,  Networking,  PersonalBlog

    A CISCO Lab

    December 26, 2020 /

    Merry Christmas to those celebrating it. Hanuka for those celebrating that. Kwanzaa for others, and a number of other year-end/year-beginning festivals as well. I wish all of you peace, and good health for yourselves and your families. In another week or two I will be taking the CCNA as one of the final parts of my Bachelor’s degree, so I’m doing a lot of labs. In packet-tracer(from Cisco) and on the Cisco equipment I bought in pursuit of a career in network engineering/operations and security. As part of that process I’ve consumed a lot of content from many sources. From my WGU (my college), from LinkdIn Learning, Pluralsight, Udemy. from…

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  • Linux,  Linux Desktop,  Networking,  Open Source,  PersonalBlog

    Brain dropping: NMAP

    September 22, 2020 /

    I’m starting a ‘brain droppings’ thread. As I do searches for one thing or another I will try to place the actionable results here. For me mainly because if I looked it up once, I will likely be needing it eventually again…and as a public service of sorts in case someone else is looking this stuff up. NMAP on Ubuntu 20.04 The nmap utility is present on Ubuntu 20.04 just as you would expect. However, zenmap is not present. There are ways to get it, such as downloading the .RPM from nmap.org and using alien to convert it into a .deb for installing with dpkg. There is another GUI for…

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