Since I switched ISPs the computers on my LAN have had their TCP stop working when the internet is connected (usually after 10-15 minutes, but on occassion it hasn’t happened till much later). At that time no packets even seem to be going out. Applications using UDP (such and my internet phone) continue functioning without problems. The ISP has been unhelpful in solving the problem (I believe it happens after the lights on the wireless modem flicker, which they claim should never happen but does). Once it happens I have to reboot. Is there a simpler way to handle or even prevent this problem?
