I just started working at a Public Library in East Tennessee we are having persistent problems with our public computers losing internet connectivity repeatedly out of the blue. The problem most typically manifests when a customer is browsing any web page they simply become unable to load any new pages. If I open a command line I can ping google (17 or 16ms) no problem but loading any new webpage doesn't work. The only thing we have gotten to work is to simply restart the machines. 99% of the time they'll work again on the first try. But sometimes they'll only work for half an hour before the problem comes back.
release/renewing the IP addresses does not resolve the issue.
All the computers (except the staff machines which have had no issues) are set to recieve their IP addresses automatically (staff machines have defined IP addresses). So I don't think it is an issue with our DHCP settings.