Tweaking your WiFi configuration for maximum throughput sometimes have adverse side-effects, we have already seen how changing your WiFi channels can create problems with non-standard or incompatible WiFi cards.

Having customized your WiFi config can also create strange problems like WiFi being visible and connectable but with limited functionality and no web-browsing. As evident from the screenshots on the right and below my iMac running Mac OS X 10.8.2 is having issue communicating with my router, after researching over the internet reading numerous forums and help articles I finally figured out the solution experimenting with my router config.