Comcast Xfinity DNS Servers Setup and Troubleshooting

To set up Comcast Xfinity DNS servers, you'll need to access your router's settings.

The default DNS server for Comcast Xfinity is 75.75.75.75 for IPv4 and 2001:5583:100::75:75 for IPv6.

You can also use the Google Public DNS servers as an alternative, which are 8.8.8.8 for IPv4 and 2001:4860:4860::8888 for IPv6.

Comcast Xfinity recommends using their DNS servers for optimal performance, but you can also use third-party DNS services like Cloudflare or OpenDNS.

For your interest: Comcast Xfinity Ipv6

Troubleshooting DNS Issues can be a real pain, but don't worry, I've got you covered. The error "DNS server not responding Xfinity" is often due to Xfinity internet DNS preventing access to or blocking access to certain websites.

To resolve this issue, you can try redirecting the DNS server address. This involves a series of steps: click the Windows key and select run, then enter "control" and press enter, and so on. You can refer to the detailed steps below for a clear guide.

Additional reading: Can I Still Access a Comcast Net Email

Here's a step-by-step guide to redirecting the DNS server address:

If the above process doesn't work out, you can try clearing up the DNS Cache Memory. This involves entering the following commands in the command prompt while running the device as an administrator:

Xfinity users often encounter DNS server issues due to their internet DNS preventing access to or blocking access to certain websites.

To resolve this issue, try redirecting the DNS server address. This involves clicking the Windows key, selecting run, and entering "control" in the popup box to open the Network and Sharing Center.

First, click on the Network and Sharing Center found in the large icons, then select Change Adapter Settings. Next, right-click LAN Connection and click Properties.

Select Internet Protocol Version 4 (TCP/IPv4) and click properties again. Put a checkmark against Obtain an IP address automatically to enable the DNS server address to be obtained automatically.

Click OK and repeat the process for Internet Protocol Version 6 (TCP/IPv6). After that, reset the Xfinity router and PC to complete the process.

If this process doesn't work, try clearing up the DNS Cache Memory by entering the following commands in the command prompt while running the device as an administrator:

1. ipconfig /flushdns

2. ipconfig /registerdns

3. net stop dnscache

4. net start dnscache

Consider reading: Cox Cable Email Outage

You might see a bunch of DNS servers listed when you connect to a new Wi-Fi network, like 75.75.75.75 and 75.75.76.76, or some long sets of characters like 2001:558:feed:1 and 2001:558:feed:2.

These are likely DNS feeds, which are used to block probes that are constantly being sent to every IPv4 address on the internet, known as the "background hum of the internet".

This activity is normal and shouldn't be a cause for concern, but it's worth noting that your router should be blocking these probes from reaching your local network.

If you're seeing a lot of DNS feeds, it's a good idea to check your router configuration to make sure it's set up to block these probes.

As a new iPhone user, you might not be familiar with all the technical terms, but knowing what DNS feeds are and how they work can help you troubleshoot any issues you might encounter.

Configuring your router can be a bit tricky, especially when it comes to Comcast Xfinity. Unfortunately, Comcast Xfinity does not allow the DNS to be changed on their devices.

Comcast Xfinity's security concerns may be a reason for this limitation, but it doesn't mean you can't get CleanBrowsing to work on your network. It just takes a bit more work.

Dynamic devices can cause issues with DNS changes, but this doesn't necessarily mean CleanBrowsing can't be used.

Additional reading: Comcast Xfinity Manage Devices

If you're not happy with Comcast Xfinity's DNS servers, you have alternatives. Cloudflare DNS is a popular choice, offering improved security and faster speeds.

Cloudflare DNS is free and available to anyone, making it a great option for those on a budget.

Google Public DNS is another alternative, providing faster and more secure DNS services than Comcast Xfinity.

Google Public DNS is also free and can be used by anyone, making it a great option for those looking to switch from Comcast Xfinity.