1. Introduction to Information Security
Wireshark and Scapy

2. Exercise 6
Submission deadline extended to 3.5 to fix the following issues:
Check the exit code only to determine whether convert failed
Put the explanation as to why fuzzing the first and last 750 is enough at the top of the .txt file
Use the correct format
0x<byte>.<bit>\n
Bits are numbered from 0 to 7
Bytes are numbered from 1
Don't copy the entire file over for every bit flip, that's ridiculously inefficient

3. The Great Ascent
We shift our focus from low-level vulnerabilities (buffer overflows) to high-level ones (DNS poisoning)
Network vulnerabilities are just as sophisticated and interesting!
They are not simpler, but they are easier to debug
Tools:
Wireshark (and maybe tcpdump)
Scapy

4. A Few Words about Python

5. Python Probably the best language in the world For scripts, we know...
But also:
For web development (django, flask)
For scientific research (numpy, scipy, sympy, matplotlib, ipython notebook)
For big data analysis (pandas)
For machine learning (scikit.learn)
For big and complex systems (twisted, sqlalchemy)
Other stuff (re, pycrypto, PIL, nltk, scrapy)

6. A Few Words About Python
How can it be?
It's modern and cool
It's extremely dynamic
Everything is an object (even classes!)
You can overload and hook just about anything
Focuses on developer time
Simplicity
Interactivity
As a side-note for skeptics, with stuff like PyPy it's also incredibly fast
Nowadays, that's what takes 90% of the time!

7. Example class A(object): def __call__(self, x, y):
return x + y
def __getitem__(self, key):
return key.upper()
def __getattr__(self, key):
return key.ljust(10, '.')
>>> a = A()
>>> a(1, 2) 3
>>> a['foo']
'FOO'
>>> a.foo
'foo '

8. How to Learn
If you're not sure how to do something, Google it or look in Stack Overflow
Don't copy solutions blindly – but do learn from them
For example, many of you reinvented the wheel instead of using binascii / struct
Almost nobody automated the core dump address extraction 
Sounds hard?

9. Example

10. Back to the Point

11. Wireshark Allows to capture ("sniff") incoming and outgoing packets
Amazing deconstruction and visualisation
Incredible number of supported protocols
Filters and more

12. Wireshark

13. Scapy
A Python library that allows constructing, deconstructing, sending, receiving, sniffing and virtually doing anything you can imagine with packets
Read the tutorial:
>>> from scapy.all import *
>>> s = IP(dst=' ') / TCP(sport=65000, dport=80, flags='S')
>>> a = sr1(s)
>>> a[TCP].sport 80
>>> a[TCP].sprintf('%TCP.flags%')
'SA'
>>> sniff(lfilter=lambda p: UDP in p, prn=lambda p: p.summary())
...

14. Exercise 7
A series of unrelated question, each about a problem and its solutions
The problems themselves may have been learned in class
But anyway, they are explained in detail and are in fact quite simple
A big open bonus I will personally grade "by ear" (so no appeals – but do try to impress me)