Cisco Ipversity Lab 1 Writeup

-

I haven't touched Cisco since CCDC. I found Ipversity on twitter and thought this would be good practice for my rusty skills. I remembered most of the commands and even how to implement OSPF. During my Cisco 1 and 4 classes, I always wished there was a 'Fix this network topology' website that was like Vulnhub. Well its finally here! I couldn't wait to dive in.

Warning - Spoilers

Lab 1

The first thing I do is get out a piece of printer paper. I draw the diagram and use markers to see the connection. I write down interfaces and IP addresses too. I start on the end-devices and work my way inwards.

The second thing you need to do is turn on interface g0/0/1 on Router 1 (I'll call it B due to habit). Packet Tracer will show the red triangles which means its off.

The next step is to fix the subnet mask on RouterA's g0/0/1 interface. It should be 255.255.255.252, not 255.255.255.240. Our OSPF config won't like this. Do a shut/no shut once you change it.

The RouterA DHCP default-router IP address and interface g0/0/1 IP address DO NOT Match. You can go about this in two ways. 1. You change the interface IP address to "ip address 10.0.1.11 255.255.255.0" OR you change the DHCP default-router address to 10.0.1.1. I'm OCD on this and like my routers to end in 1's. I will change the default-router option instead.

The last step is to change the OSPF configuration on both RouterA and RouterB. Below is my config for each.

And now you can ping back and forth!

Comments

  1. AnonymousMarch 24, 2022 at 3:08 AM

    This comment has been removed by a blog administrator.

    ReplyDelete

Post a Comment

Popular posts from this blog

Palo Alto for GNS3 CCDC Tutorial

-
Image
Opening Hello fellow CCDC Competitors! Struggling to get a Palo-Alto VM? I know how you can get one! Email me at ASzampiasSWD@gmail.com. I'll tell you the steps to get a PA-VM for GNS3. Why am I giving this info to you? Wouldn't it make sense to hog the info to myself? Wouldn't my team have an advantage? There are have and have not universities when it comes to PaloAltos. I fell into the "have not" group. Our college didn't have access to PA-VMs and still doesn't. Even if PA Cybersecurity Academy is free, there is too much red tape. I can't change the outcome. I can only come up with this one solution. Another reason is Tri-C is a tryout team. I think its pretty unfair as a potential Firewall Admin I'm the only one with access. No one can challenge me unless they spend 2K for a PA-VM. It becomes a rich-person only position. I have a leftover PA-VM from 2018 I promised not to share. I couldn't share that with my challengers. But I f...
Read more

Trace Labs Global Missing Persons CTF V

-
Image
Trace Labs CTF V TraceLabs hosted the Global Missing Persons CTF V event on July 11, 2020. My team //synergy got 64th place out of 190 teams. Introduction This was my first Trace Labs CTF. I captained a team. The good thing about being a captain is you can control who is on the team. My rules were: Must have sock puppet accounts ready. Must have a VPN. Writing out this is a competitive team where we work the entire 6 hours. I was worried about a future team member spamming submissions and disqualifying the team. I thought my requirements would eliminate people who weren't serious. The team hit 4 members Friday evening pretty quickly. Notes My laptop was too slow for this event. My virtual machine froze and I had to restart. Restarting means I have to login to my accounts again. I'll use my desktop next time. The team used Slack and Trello. Our strategy was to research a person and rotate every hour. This strategy broke after 1 rotation. Some missin...
Read more

Release of CCDC ISE Manager Website

-
Image
I worked on the ISE (Inject Scoring Engine) website from 2017 to 2019. I made it to encourage teams to follow a merit-based, open admission tryout format. I identified a problem and made a solution for it. Problem: Call for Merit and Fairness on CCDC Rosters Solution: Github Project Solution: How to run a Team After Tri-C was finished with 2017 Midwest Wildcards I used httrack to grap the Inject PDF files. I didn't grap just the files, but the entire front-end code of the website. If you created the HTML and CSS of the original ISE website, tell me your name so I can give you credit! My goal was to make an almost-replica of the original. The database and back-end code is all guessing by me. I used a LAMP stack because I believe the original website is built on that. I did some fingerprinting and found the "ccdcadmin1" website was hosted on Apache and PHP. If you notice any bugs or errors let me know. If you want a feature added let me know. I will be working ...
Read more