where do I start to fix the problem?
 

Here's a happy linux newbie. I can maintain a pre-configured system but I don't know where to look to fix this problem:

The problem is that my network is down every time I reboot linux. There's nothing wrong with my connection, since it works after I reboot it manually from the mdk control center.

I am asking for clues where to look to find the reason for this problem. I've seen nothing unusual in /var/log/boot , but I haven't checked elsewhere. eth0 returns OK during the boot.

maybe try doing a ifconfig eth0 in the cli. or try pump eth0.