I had a strange problem. I had a critical up date that was loaded Tuesday after which I started to have problems accessing websites. The diagnostics indicated it was a DNS error. I did the usual things to track it down and finally got around to unplugging and restarting My D-Link DIR-655 router. When it restarted I had a security warning telling me my security settings where preventing certain functions of the 655 from working. I gave the permission to stop whatever it was doing to the 655 and now everything is working again. A heads up for anyone that might run into this.