NET150 03 Journal - eitan-j/tech-journal GitHub Wiki

Week 1

Lab 1-1

  • ipconfig gives network info
  • ipconfig /all gives more ip info
  • ping [addr] test connectivity to [addr]
  • tracert [addr] shows hops to [addr]
  • nslookup [addr] requests info for [addr] from DNS
  • Command prompt
    • Win+R
    • cmd
    • Enter

Week 2

Lab 2.1

Lab 2.2

  • Installed wireshark
    • apt install [program] -y to install program
  • Added eitan to wireshark group
  • Relogged
  • Used wireshark

Week 4

Lab 4.1

Lab 4.2

Lab 4.3

Week 5

Lab 5.2

Week 6

Lab 6.1

  • Modified previous network with VLSM
  • Switched to RIP v2

Lab 6.2

Pt 1

  • I actually got the table spot on
  • I did mess up converting the manufacturing network CIDR to netmask

Pt 2

  • Assigned IP and netmask to computers
  • Manufacturing network mask was wrong
    • Fixed
  • Enabled RIP v2 on both routers
  • NA router didn't have enough ethernet ports
    • Added RJ45 port module to NA router
  • Integrated ethernet connections were not connecting at all
    • Added RJ45 port module to Mumbai router
    • I later realized that I just forgot to turn their interfaces on
  • Module-added connections could not be assigned IP addresses
    • The module I added was actually for "switching ports"
    • The routers I had chosen didn't have any modules that added layer 3 ports
    • Replaced both routers with ones that supported layer 3 ports
      • I didn't need to replace the Mumbai router, but I did
  • Reconfigured new routers
  • All computer pings failed
    • Packet was being sent to MAC address of old router
    • Reset ARP cache
  • Pings between the two locations failed
    • I forget to enable RIP v2 on Mumbai router
  • Pings between the two locations still failed
    • It just started working after awhile without me doing anything???
      • Only the first ping fails, subsequent pings work

Week 9

Lab 9.1

  • Static Routing
  • Pings sometimes seem to fail on first try and work subsequently

Week 10

Lab 10.1

  • Used RIP v2
  • This seems like the same stuff we've already done in week 6

Lab 10.2

  • More RIP v2
  • Similar to Lab 10.1

Week 11

Lab 11.1

  • Set up VLANs

Week 12

Lab 12.1

Lab 12.2

  • Set up wireless network
  • I spent a long time troubleshooting
    • The issue was that I didn't configure the network subnet
  • I think the GUI of the wireless router is really bad
    • The IP address fields are all split so you have to press tab to get to the next field
    • The subnet mask is entered using a drop down menu
    • Saving
      • The save button is not visible on the screen by default
      • It allows you to exit a page without saving without any prompt
    • In the top submenus, the active page is white while the disabled pages are light gray, and the other pages are black on dark blue
    • It has a text on the right that says "Help..." as if it's a button or link, but it's just normal text
    • I could not find any way to access a CLI
    • Basically I just hate this GUI

Assignment 12.2

  • My network is currently using a /27 mask, which allows a maximum of 30 hosts
    • During the day, there should be around 100-150 devices on this network, so this should not be working
    • I looked at my phone, and it's on a different network, even though it's on the same network
    • Using an android terminal emulator (isn't it cool that that exists!), I found that my phone is on 69.5.123.0/25
      • This is what I remember the computer also being on before
    • At this point I have pieced it together in my head

What happened

  • Prior to around a month ago, we were just on the /25 network
    • This only has room for 126 hosts
      • This allowed most, but not all devices to connect simultaneously
      • During peak hours, one could sometimes not connect
      • At any time, it would take a few seconds to a few minutes to connect to the network
      • People complained about this
  • Someone got us more IP addresses
    • They probably couldn't just increase to a /24 because 69.5.123.128/25 is probably already allocated to somebody else
      • So they gave us a non-adjacent IP range
  • I just realized that my laptop has always connected to the internet instantly since around a month ago
  • The two different subnets probably won't effect anything, other than allowing more hosts
  • Now the network can handle 156 hosts, which should be enough
    • It's also possible that there is another subnet that I'm unaware of, but that wouldn't make sense to do.

Week 14

Lab 14.1

  • Messed around with FTP
  • Newer versions of Firefox have FTP disabled, and need to have a setting changed
    • Future versions of Firefox are planned to remove ftp altogether
  • FTP is very not secure
  • FTP commands
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