hi Red
this very thing happened to me when I first installed SNF
I think what happens is when you edit the network card configuration, and especialy change what interface the admin is on, it seems to forget which driver goes with what card.
if you a lsmod you will noptice that only one network driver is installed, and have a look at /etc/modules.conf I had problems in there too.
The only way I could figure out how to fix it was to reinstall :-( any you do on the command line is forgotten when you reboot, which is why I decided to reinstall.
I now have a nice reliable SNF running (I have also updated a bunch of software).
are you able to update packages?? if you can't it probably mean you need to update some packages manually, which is not hard to do, but it may have some affect on how the www-front works.