CS469/569 - Linux and Unix Administration and Networking

Spring 2022

Displaying ./code/04-26/README

h9
- comments in ../04-21/README
- questions, want me to check your settings?

h10
- demo of Jeff's solution in firefox: https://effie.indstate.edu:44311
- and let's see it in wireshark
- questions?

Attendance

From last time...
* Test server/client
* SSL/TLS handshake - demo in wireshark
* PRNG - https://en.wikipedia.org/wiki/Pseudorandom_number_generator
  - Simple ones for testing / randomized algorithms
  - Strong ones for use in crypto

New this time...
* Networking lessons and commands
* Identify a computer - IP address (like building address)
* Identify a program on a computer - port number (like office number or person name)
* Where is the IP address, etc. - IP protocol version 4, TCP protocol
* Packets... (Lesson 17)
  Data out: GET /info/index.php
            headers/metata
  Data in:  HTTP/1.1 200 OK
            headers/metata
	    ...
	    <!DOCTYPE html>
	    ...
	    </html>
  Data out - I want that to go to cs.indstate.edu, and
  to go to the web server (apache) on cs.indstate.edu

One more quiz
- last few lessons

h11
- maybe/probably, I have complete it first
- quotas, file permissions, web security, htaccess, email, ...

Final exam
- cummulative, including last few lessons
- our exam slot is Thursday May 5, 10-11:50am
- will use exam slot as our last lecture