My settings and question are at the bottom of this. I use AttCallvantage over Comcast Broadband.
I've received the following letter:
Dear Comcast Customer:
Comcast is focused on providing the best experience for all of our customers. We recently updated the domain name server ('DNS') components in our network to help ensure that we continue to deliver the high quality service you expect from Comcast.
Over the years you may have manually configured DNS settings for a variety of reasons. If so, it is important that your PC is configured for dynamic DNS communication. To help ensure that you do not lose your internet connection, we ask that you follow the directions outlined in the following FAQ?s: ... To prevent any loss of Internet connectivity in the future, please take the time to make these changes to your DNS settings. We ask that you make these changes by March 12, 2006 to prevent any disruption in your Internet service.
You can find answers to your service questions instantly at Comcast.net. If you still have questions, please email our Customer Service Representatives. Our knowledgeable Representatives are available 24/7 to promptly respond to your questions.
Sincerely, Comcast High-Speed Internet