what is a shell?
A Shell is a UNIX term for the interactive user interface with an operating
system. The shell is the layer of programming that understands and executes the
commands a user enters. In some systems, the shell is called a command
interpreter. A shell usually implies an interface with a command syntax (think
of the DOS operating system and its "C:\>" prompts and user
commands such as "dir" and "edit").
A shell account simply gives you remote access to a shell on server ( usually
un*x ), allowing you to execute the commands that you have permissions to
execute.
You can always use a shell account to perform anything from
simple commands ( telnet and ping ) to create a secure connection between your
host and the shell, then generate a connection from the shell to the desired
destination.
Check this LINK
for a list of Free shell account Providers
Back to our subject :)
A shell account can be used to hide your
identity, but its way too difficult to be used by a newbie ( you wouldn't
be reading this section if you weren't one :) ), thus Hiding the IP
using a Proxy server is recommended.
Any how,
-If you want to hide your IP when you establish a telnet connection to a
remote host, you can simply connect to a shell account and establish the
telnet connection from there by simply typing ( telnet ) at the command
prompt.
-If you want to hide your IP when you establish an Ftp connection to a
remote host, you can also connect to a shell account and establish the
Ftp connection from there by simply typing ( ftp ) at the command
prompt.
If you want to hide your IP with any other kind of internet
communication you need SSH.
ssh -R <local
port>:<Proxy Server>:<Proxy Port> <shell address>
Example:
Supposing that you want to use a shell provider called nether.net
and supposedly you destination server is ( host.domain.com ) on port 21
now you have to choose a port which is open. I.e. 12000
you type
ssh -R 12000:host.domain.com:21 nether.net
you will be asked for your nether.net password
you type your login password.
that's it
now all you have to do is to connect to nether.net on port 12000, and it
will be as if you are connected to host.domain.com on port 21 !
Explanation: Nether.net establishes a secure connection to your machine
through port 12000, and a remote connection to host.domain.com on port
21.
this technique can be used to bypass ISP`s Proxy restriction and port
blocking
( explained in their appropriate sections )
But hey!!. what if SSH wasn't installed
on the shell ??
Don't worry. here comes a step by step guide :)
Installing SSH:
-
log in to the shell account.
-
Download the SSH Client. either by
FTP, by mail , or any other way that works, I would suggest that you
use LYNX ( text based web browser )
-
Unpack the file By doing the
following:
gzip -dc ssh-x.x.x.tar.gz | tar -xvf -
If you get an error message
saying that the file doesn't appear to be a Gzip file, then you
might want to try to use the following command
tar -xvf ssh-x.x.x.tar.gz
This should unpack the file in a folder called ssh-x.x.x
-
Switch to that folder by typing
cd ssh-x.x.x
Notice that this
file name is for illustration purposes only!.
-
now type
./configure
Dont Forget the
period and the slash
this should show up a lot of details on the screen, the operation
should be automated, and you don't have to do anything except to
wait.
-
when this finishes and you get the
prompt again, type
make
this should also take a while.
-
Then finally, type
make install
this should take the process to the final step, and SSH will be
ready for use.
