what's the difference between half bridge mode and pppoe? Based from what I have learned from other forum threads, you set the modem in half-bridge mode so that the modem will handle the pppoe authentication to the ISP rather than the bridged mode where it only passes information to the pc and you will need win xp's built-in pppoe client or other PPPoE clients for the authentication.. Now my question is, what's the difference of PPPoE with Half bridge mode? Isn't setting the modem to PPPoE the same as setting it to half-bridge? my setup is like this: AM300-->WRT54G--PCs Thanks! for your feedback in advance.