Servidor com 2 acessos a Internet

["bannack" <bannack@terra.com.br>]

Hi,
  I work in a company who has a NT net with a firewall closing a lot of ports, ips and key words, with a 2Mbps link to the Internet.
  I have inside this company a DSL channel to tests, that is disconnect from the main net, and is connect just to one alone computer.
  I have a computer with debian, connected to the NT net and configured to access with ssh. 
  I'd like to connect the DSL channel to this debian computer but only acces the Internet with the DSL channel, and not permiting to no other computer use this ADSL. And I'd like to connect to this debian using ssh and export the display to my terminal and access all the web.
  Am I a crazy, or is it possible to do?
  And what about the security in this case?
  Tanks for your help.

[INTERNET]
    |-----------------\
[2Mbps Link]          |
    |                 |
[FIREWALL]          [DSL]
    |                 |
[NT SERVER]    [DEBIAN SERVER]
    |                 |
[COMPUTER]------------/
  

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[]'s Bannack