It went perfect for me:
For starters list what pci devices are currently present
% lspci
....
07:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8188CE 802.11b/g/n WiFi Adapter (rev 01)
09:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 05)
Modify /etc/apt/sources.list
% deb http://http.us.debian.org/debian testing main contrib non-free
일단 이 저장소는 매우 유용한 것 같다.
install updates
% apt-get update
install realtek & wireless tools
% apt-get install firmware-realtek wireless-tools