E15 Configuring Basic DNS Functionality

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Video: Instructions for E15

Assignment

STEP 1 - DNS on the Internet

1. Change your Lubuntu VM to bridged interface
2. Start to wireshark your ethernet port on the Lubuntu VM
3. In the terminal, use the dig +trace student.labranet.jamk.fi -command
4. Stop the wireshark
5. Save the output of the dig +trace command and investigate the results.
6. Screenshot relevant DNS packet contents and write how the IPv4 address of student.labranet.jamk.fi was found to your documentation

STEP 2 - DNS in the topology

1. Change your Lubuntu VM to the correct internal network in your topology
2. Ensure your workstation gets an IPv4 address
3. In the terminal, Edit /etc/hosts (e.g. sudo nano /etc/hosts)
4. Add records to /etc/hosts for
   1. lubuntus (e.g. `192.168.ki.x lubuntu1.firstname.lastname)
   2. router loopbacks
   3. switches
5. Test out SSH/HTTP/ping to the given domain names (e.g. lubuntu1.firstname.lastname)
6. Do a traceroute --resolve-hostnames lubuntu1.firstname.lastname

Document the steps and the results to your repository.

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License

This course and its materials are written by Karo Saharinen and licenced by Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) license.