I have a WRVS4400N, periodically it stops forwarding DNS requests to outside DNS servers. I have statically assigned my DNS servers with the same DNS servers the router has configured as well as assigned known working DNS servers the router is not configured for. Both result in the same problem. Approximately every couple of days the router seems to start blocking DNS requests. Running nslookup I get no response from DNS servers. After rebooting the router everything starts working again. I have updated to the latest firmware revision and it still does the same thing. Any ideas?