Dos- SMURF

 Smurf Attacks

Smurf attacks are popular Denial of Service (DoS) network attacks, likely named because of its use of a large number of small ICMP packets.

The goal of this network attack is to create a crushing amount of traffic. This attack strategy came about as a function of ICMP (Internet Control Message Protocol) and the network broadcast address.

   If an attacker has a large network segment that he is aware of, he can send a ping or an ICMP Echo Request to that broadcast address. Each host on that network should take that because the broadcast address was used, though the Echo Request is actually destined for itself.

An Internet Control Message Protocol (ICMP) Smurf attack is a brute-force attack on the direct broadcast feature that is built in to the IP protocol.

                     

                          

Today i am going to Show you, How to do it on the network.
Requirement :- Backtrack5R3 installed on the VirtualBox

Click on Application > BackTrack > Stress Testing > network Stress testing

then select the Smurf6

Find your interface information with ifconfig command.

then enter the command like root@bt:~#smurf6 etho VictimIP-address

Countermeasures :-

1. On Cisco Router  use the router(config)#autosecure command.

2. On the Cisco Router, use the router(config)#no ip-directed broadcast command.