I have a network problem that drives me mad. First - the setup. I have two PCs connected via Ethernet to a router, running lt2p and other staff. Most of the time it works OK.

Internal network works 100% all the time, both PCs and the router are always accessible. However, internet access vary. For instance, from time to time I get to a state where from one of the PCs internet connection works, but not from the other. Needless to say, reboot cures the problem.

Both machines has pretty new HW and run recent out of the box versions of Ubuntu.

Damn, my Windows laptop needs fewer reboots than Ubuntu "server"!