Mine

src/gz snapshots http://wifi.ozo.com/airo/openwrt/firmware/kamikaze/2.6/x86/26751/packages                                                          
dest root /                                              
dest ram /tmp
lists_dir ext /var/opkg-lists
option overlay_root /overlay 
#option http_proxy http://10.2.19.1:8080
option http_proxy http://192.168.1.75:8888