> ## Documentation Index
> Fetch the complete documentation index at: https://docs.goguardian.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Fix DNS Resolver Connectivity

> Steps to diagnose and resolve GoGuardian DNS resolver connectivity issues when resolvers are not responding.

GoGuardian DNS resolvers are not responding when traffic from your network is not reaching GoGuardian's DNS servers. This means filtering is not active for that network.

## Identify Possible Causes

* The network's public IP address has not been added in GoGuardian Admin
* DNS traffic has not been redirected to GoGuardian's resolver addresses
* A firewall or network filter is blocking traffic to GoGuardian's DNS servers
* The public IP address in GoGuardian Admin does not match the current public IP of the network

## Apply a Solution

1. Confirm the network's public IP address is entered in GoGuardian Admin under **Filtering** → **DNS Networks**. If it is missing or incorrect, update it and save.

   <img src="https://mintcdn.com/goguardian/lfhIQmtwpMwMqlGZ/images/screenshots/troubleshoot-dns-resolvers/step-01.png?fit=max&auto=format&n=lfhIQmtwpMwMqlGZ&q=85&s=7ff53d62db4bd5f1dbe6d07943a488d8" alt="DNS Networks in GoGuardian Admin" width="2880" height="1200" data-path="images/screenshots/troubleshoot-dns-resolvers/step-01.png" />

2. Confirm your network's DNS traffic is pointing to GoGuardian's resolver addresses. Find the device that manages public DNS settings — typically a firewall, router, or DHCP server — and verify the following addresses are configured:

   ```
   35.155.221.215
   35.167.25.37
   52.24.103.199
   54.214.161.74
   ```

3. Test connectivity to each resolver using the terminal command:

   ```
   nslookup goguardian.com [resolver IP]
   ```

   Replace `[resolver IP]` with each resolver address. A response confirms connectivity. No response indicates the resolver is unreachable from your network.

4. If connectivity tests fail, check your firewall and network filters to confirm that incoming and outgoing traffic to GoGuardian's resolver addresses is permitted.

## Contact Support

If none of the above resolved the issue, contact GoGuardian Support with the results of your `nslookup` tests and your network's public IP address.

## Resources

* [Set Up GoGuardian DNS](/products/dns/set-up-goguardian-dns)
* [Understand GoGuardian DNS](/products/dns/understand-goguardian-dns)