Disable IPV6

Currently, IPV6 has entered thousands of households. However, in some cases, IPV6 addresses need to be disabled. Smartdns supports the following ways to disable IPV6 addresses.

Method 1: Completely Disable IPV6
```
force-AAAA-SOA yes
```
Method 2: Disable IPV6 of Specific Domain Name
```
address /example.com/#6
```
Method 3: If you need to disable IPV6 queries for a specific query port (such as the second DNS), you can configure it as follows:
```
bind :53 -force-aaaa-soa
```
Exception configuration:

If you disable AAAA is enabled, you can add exceptions with following options:
```
address /example.com/-
address /example.com/-6
```

Disable Other Query Requests

Smartdns supports disabling other query requests, and the corresponding parameter is force-qtype-SOA.
```
force-qtype-SOA 28
```
After force-qtype-SOA parameter is the type of DNS. The specific types can be queried from the IANA Explanation.

Clear specified types
```
force-qtype-SOA -,28
```
Clear all types
```
force-qtype-SOA -
```

Additional Notes

Smartdns has the ability to automatically detect IPV6 environment. If the network environment does not support IPV6, the IPV6-related optimization functions will be automatically disabled.