After format/install, ethernet wont work

[rbf1138]

After formatting and reinstalling Leopard on my Macbook, everything is back in working order, including Airport WiFi, but connecting my ethernet cable does not allow me to use the internet. It says it's connected, but always tells me it has a self-assigned IP. What am I missing/not configuring to get this working again? I should note it worked fine before the reinstall. I've also installed all the system updates.

Thanks

 

[Cave Man]

Check System Preferences > Security > Firewall > Allow all incoming connections is active.

 

[rbf1138]

yeah, its set to that

 

[Uoila]

Does setting a static IP allow you to get out?