|Its not a network engagement application you need, it is knowledge on how to set up a secure witless connection. The routers manual will tell you how to do that under wireless configuration.|
What would help is install Windows XP SP3. There were a lot of security holes filled with SP3.
By the way, there is no such thing as a DSL network. DSL ends at the Modem at and from then on it is Ethernet. DSL is just a single wire from you you to your telephone service provider.
DSL = Digital Subscriber LIne. A type of telephone line for transmuting both voice and data down the same cable.