On the Target (Server)
Identify the IP address of the target (server) by typing ifconfig and pressing
Enter.
546 Practical Hacking Techniques and Countermeasures
From the directory containing the compressed files type tar ??“zxvf icmpbackdoor.
tar.gz.
The files will uncompress into a new directory named icmp-backdoor.
Change to the new directory by typing cd icmp-backdoor and pressing
Enter.
The next step is to compile and create the server portion by typing make
server and pressing Enter.
The server portion will compile and create.
Wireless 547
To execute the new application, type:
./ibd-server
In this example, the ICMP code is set to 0. The 0 makes the server respond
with Echo Reply headers.
The icmp-backdoor server portion will initialize. Proceed to the client part.
548 Practical Hacking Techniques and Countermeasures
On the Attacker??™s Machine
Confirm the attacker??™s IP address by typing ifconfig and pressing Enter.
From the directory containing the compressed files type tar ??“zxvf icmpbackdoor.
tar.gz.
The files will uncompress into a new directory named icmp-backdoor.
Change to the new directory by typing cd icmp-backdoor and pressing Enter.
Create and make the client portion by typing make client and pressing Enter.
Wireless 549
The icmp-backdoor client will compile and be created.
To initialize the client and connect to the server, type:
./ibd-client
In this example, the ICMP Code was set to type 8, Echo Request.
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