Troubleshooting No DNS AAAA Response for Fortigate IPv6 Home Lan
Setting up an IPv6 home network can be a challenging task, especially when it comes to configuring DNS. In this article, we will discuss the common issues that users face when setting up DNS for their Fortigate IPv6 home network and provide troubleshooting steps to resolve them.
Understanding DNS and IPv6
DNS (Domain Name System) is a system that translates domain names into IP addresses. With the depletion of IPv4 addresses, IPv6 has become increasingly important. IPv6 uses a 128-bit address, which provides a much larger address space than IPv4. However, configuring DNS for IPv6 can be tricky, and many users encounter issues with DNS resolution.
Common Issues with DNS and Fortigate IPv6 Home Network
One of the most common issues that users face when setting up DNS for their Fortigate IPv6 home network is the lack of AAAA records. AAAA records are DNS records that map a domain name to an IPv6 address. Without AAAA records, DNS resolution will fail, and users will not be able to access websites or services.
Another common issue is the lack of support for IPv6 in public DNS servers. Many public DNS servers do not support IPv6, which can cause issues with DNS resolution. In addition, some ISPs may not have enabled IPv6, which can also cause issues with DNS resolution.
Troubleshooting Steps
To troubleshoot DNS issues with your Fortigate IPv6 home network, follow these steps:
Check your network configuration to ensure that IPv6 is enabled and that your Fortigate device is configured to use IPv6.
Check your DNS configuration to ensure that AAAA records are present. You can use tools like DNS Checker to check for AAAA records.
If AAAA records are missing, you may need to manually add them. You can do this by adding a new DNS record in your DNS server with the IPv6 address of your Fortigate device.
If public DNS servers do not support IPv6, you can use a public DNS server that supports IPv6, such as Google DNS or Cloudflare DNS.
If your ISP does not support IPv6, you may need to contact them to enable IPv6. Alternatively, you can use a tunnel broker service to enable IPv6 on your network.
Enabling NAT64 and Changing Public DNS Servers
If you are still experiencing issues with DNS resolution, you can try enabling NAT64 and changing your public DNS servers. NAT64 is a network address translation protocol that allows IPv6 hosts to communicate with IPv4 hosts. By enabling NAT64, you can ensure that your Fortigate device can communicate with IPv4 hosts, even if they do not support IPv6.
To enable NAT64, follow these steps:
Log in to your Fortigate device.
Go to Policy & Objects > NAT > NAT Policies.
Create a new NAT policy with the following settings:
Incoming Interface: WAN
Outgoing Interface: LAN
Translation Type: Dynamic IPv6 to IPv4
IPv6 Address: The IPv6 address of your Fortigate device
IPv4 Address: The IPv4 address of your Fortigate device
Once you have enabled NAT64, you can change your public DNS servers to a DNS server that supports IPv6. For example, you can use Google DNS with the following IPv6 addresses:
2001:4860:4860::8888
2001:4860:4860::8844
In this article, we discussed the common issues that users face when setting up DNS for their Fortigate IPv6 home network. We provided troubleshooting steps to resolve these issues, including enabling NAT64 and changing public DNS servers. By following these steps, you can ensure that your Fortigate device can communicate with both IPv4 and IPv6 hosts, and that DNS resolution is working correctly.
References
Fortinet: Configuring IPv6 DNS Settings
Google: Using Google Public DNS
Cloudflare: DNS over HTTPS
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