adsl internet connection problem with 2 network cards

[yufan]

buddies,
my box has 2 network cards.one of them is connected to a external adsl
modem.i just installed fedora in this new com and now i am trying to connect
to internet through the adsl and use the other card to share this connection
with my another com.however,i cannot surf even after i configure the PPPoe
and activate the connection.what's goes wrong or could someone just tell me
how to figure this thing out?thanks in advance.
yufan
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