instruction:
1.syn.c
  features: TCP flooding from one spoofed IP at different source port
  ./syn sourceIPaddress sourcePort victimIPaddr victimPort
  
2.synflood.c
  features:TCP flooding from one spoofed source IP at same source port(5678)
  ./synflood sourceIPaddress  victimIPaddr victimPort
  
3.tcp-flooding.py
  features:TCP flooding from different spoofed IP at different source port
  python tcp-flooding.py sourceIPaddress sourcePort victimIPaddr victimPort
  
Simulate syn flooding between Vms

prepare the virtual environment with vagrant.
Virtual machine 1: victim
Virtual machine 2: 

Logical network topology of VM



TCP flooding tool at attacker side

I tried Java, C and Python for the TCP flooding client.

Since Java doesn't support raw socket, an alternative way to realize tcp flooding in java is JNI. 

My first draft was C, and improved to multi-threading later. 
Another version is written in python, I add multi-threading as well.

In order to collect the Syn-received msg easily, I use a ruby script to fetch the data automatically.

Source code file version:

Source File name	Main function	feature	Attack effect
synflood_ipspoofing.c	Initial attack 	rawsocket	Longest DoS time
Syn.c	Initial attack 	Multi-threading	medium DoS time
Tcp-flooding.py	Initial attack 	rawsocket	medium DoS time
Tcp-flooding-multi-threading.py	Initial attack 	Multi-threading	Longest DoS time
check_syn_flood.rb	Counter the syn-recv TCP session number		


Test environment preparation:



1. Verify 80 port on virtual mahcine victim	

	
	
	




Attacker synflood_ipspoofing