The network chip is a RealTek RTL8139 which works well with the module 8139too.o

Add the following line to /etc/modules.conf (in Debian to /etc/modutils/aliases and run update-modules)

alias eth0 8139too

for V33i:
alias eth0 r8169

and the driver will be loaded automatically when bringing up the interface.

To configure the interface use the setup-tool of your distribution.
In Debian insert the following lines (adapted to your network setup) to /etc/network/interfaces.

auto eth0
iface eth0 inet static