Strange Apache behevior

[Barry Brimer]

> Everything works well when i logged in with ssh. But 30 minutes after
> i close ssh session apache stops serving pages. If i login again to
> the server the it become working as before and there is nothing
> strange in the logs.

Have you checked dmesg?  I know nothing about Wake-on-LAN, but is it 
possible you have some interesting WOL settings?  I think ethtool can tell 
you about WOL settings of ethtool-supported cards.

Barry