I have a ubuntu pc with openssh server installed in my home network. I can connect via SSH to it without any problems.
Being connected, every bunch of minutes this machine is not more able to ping to any host outside, even to the internal router (which one is used for NAT at the same moment). If I would not be connected remotely during expecting those problems, I would blame the network cable or firewall; but because this very connections seems to work, I have no idea where I could search for the problem.
Any hints? Thanks!