I have a problem with a (remote) server running SCO UNIX. It's been working for years, but was recently moved, and I changed its IP address & gateway address. Since then it works perfectly until after EXACTLY 48 hours, other machines can't connect to it through the network, and can't ping it. The server also can't ping any other machines or the gateway on the network. Everything is done by IP address (no DNS issues). The server continues to function normally otherwise. I tried replacing the network switch to no avail. Restarting the server fixes everything for 48 hours.