If your ISP is Comcast, then probably your Internet connection is not stable. you would think a giant ISP like Comcast would have redundancy on their DNS Servers, or another sort of reliability strategy, but nay, their DNS servers keep going down, and fixing the problem does not seems to be their priority.
for those non-tech people let me explain what DNS does and why is so important. DNS stands for Domain Name System and it’s the mechanism that translates website names to IP addresses.for example, when you type forevergeeks.com on your web browser address bar, the browser sends a request to a DNS server to translate that name “forevergeeks” to an IP address. computers do not understand names ( that was invented because it is easier for us to remember ) you can get to Google either using http://google.com or by typing the IP address http://220.127.116.11/ the difference is that the first option requires a DNS server to translate the name, the latter does not. but like I said, we use names because they are easier to remember.
Now, if there is no DNS servers available to translate website names to IP addresses, your browser will display an error saying that the web page was not found. and this is what I been getting a lot lately. I knew almost immediately the problem was DNS, but I started blaming my cheap Netgear wireless router for the problem, but it puzzled me why I could get to websites using the IP address but not the name. I was getting suspicious, so I did a short search on Google regarding the issue, and found the problem to be common among Comcast users. but still I was not convinced why Comcast would have that issue, then a few days later it was all over the news that Comcast Internet service was disrupted because of DNS issues.. oh boy said I, these people finally found out what I been having for awhile.
But to be honest, I been using Comcast services for about 10 years and never have had mayor issues with them, and this DNS problem can be solved easily without getting downgraded 10 years behind by using a Verizon DSL connection, because that’s the only alternate service currently available in my area. my solution is to use other DNS servers rather than the ones provided by Comcast automatically. there are many free DNS services, the most famous are opendns.org and Google. I would choose the latter when it comes to trust.
Google DNS server IP addresses are 18.104.22.168 and 22.214.171.124 and you can enter them on your computer or your router. I recommend using these DNS IP addresses at the router level, in that way you don’t change any settings on the computer.
In the following tutorial I will show you how I changed the DNS IP addresses on the Netgear router I have, but most home routers follow the same procedure so this should give you an idea on how to do it on your router as well.
open your browser, and type the IP address of your router. mine is 192.168.1.1 ( default ) if you don’t know the IP address of your router, open the command prompt, and type “ipconfig” normally the “gateway” IP address is the IP address of your router.
the login window should come up.
type the username and password. if you haven’t entered any username and password for the router, check the documentation for the default username and password.
Once inside the router web page, click on “Basic Settings” and under the Domain Name Server (DNS) Address option, select Choose These DNS Servers and type the Google numbers as listed above. one as primary and the other as secondary.
Once you have entered the Google DNS numbers, click on Apply. that will disconnect your Internet connection ( if you are connected to the router ) to update the new DNS servers.
that should fix your Comcast DNS problem.