1. Obtain the IP address for the Web site.
290 Part V: Application Hacking
For example, a gambling Web site (http://www.go-gamblin.com) blocked in
Web-content filtering software has this IP address:
10.22.33.44
This is an invalid public address, but it's okay for this example; you may
want to filter out Web addresses on your internal network as well.
2. Convert each individual number in the IP address to an eight-digit
binary number.
Numbers that may have fewer than eight digits in their binary form must
be padded with leading zeroes to fill in the missing digits. For example,
the binary number 1 is padded to 00000001 by adding seven zeroes.
The four individual numbers in the IP address in Step 1 have these
equivalent eight-digit binary numbers:
10 = 00001010
22 = 00010110
33 = 00100001
44 = 00101100
The Windows Calculator can automatically convert numbers from decimal
to binary notation:
i. Choose View?Scientific.
ii. Click the Dec option button.
iii. Enter the number in decimal value.
iv. Click the Bin option button to show the number in binary format.
3. Assemble the four 8-digit binary numbers into one 32-digit binary
number.
For example, the complete 32-digit binary equivalent for 10.22.33.44 is
00001010000101100010000100101100
Don' add the binary numbers. Just organize them in the same order as
the original IP address without the separating periods.
4. Convert the 32-digit binary number to a decimal number.
For example, the 32-digit binary number
00001010000101100010000100101100 equals the decimal number
169222444.
The decimal number doesn't need to be padded to a specific length.
Chapter 16: Web Applications 291
5. Plug the decimal number into the Web browser's address field, like
this:
http://169222444
The Web page loads easy as pie!
The preceding steps won't bypass URLs in Internet Explorer.
Credits: vs4vijay
Niciun comentariu:
Trimiteți un comentariu