I just got a call from a friend claiming that his Comcast Internet service was down. Luckily I use Verizon FIOS, so I wasn't affected by this. I did a quick search on Twitter and saw that many users were experiencing this problem as well. Apparently this problem is mainly affecting Comcast users in the east coast. The Comcast DNS servers are down, and that's why Comcast users are unable to access any websites.
Thankfully there are alternative FREE DNS servers that can be used to access the Internet. If you are a Comcast user, you can use either Google DNS or OpenDNS. Just change your DNS server IP address to 184.108.40.206 to use Google DNS or change it to 220.127.116.11 to use OpenDNS. Your Internet should start working again.
For a step-by-step guide on how to change your DNS, read on below:
1. Open your Control Panel.
2. Click on the Network and Sharing Center icon.
3. Find the name of the network you're connected to, and then click on View status.
4. In the Networking tab click on Internet Protocol Version 4 (TCP/IPv4) and then click Properties on the bottom-right corner.
5. Select "Use the following DNS server addresses:" and enter in the following:
- Preferred DNS server: 18.104.22.168
- Alternate DNS server: 22.214.171.124
6. Click OK. Open your web browser, and your Internet should start working now.
UPDATE: It appears that Comcast DNS servers are back up now. You can stay with the Google DNS servers or you can switch back to Comcast's DNS servers by following steps 1-4, and in step 5 switching back to Obtain DNS server address automatically.