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en/docs/config/domain-forwarding.md

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+---
+
+# DNS Forwarding
+
+SmartDNS can support DNS Forwarding by using specific DNS servers to query specific domain names, such as:
+
+```shell
+.home -> 192.168.1.1 # .home domain names are sent to 192.168.1.1 for resolution
+.office -> 10.0.0.1  # .office domain names are sent to 10.0.0.1 for resolution
+```
+
+Other domain names are resolved using the default mode. The configuration of this forwarding is as follows:
+
+## Configuration Steps
+
+1. Configure the upstream server group and group the upstream server using `-group`
+
+    ```shell
+    # Configure upstream server, specify group name with -group, and exclude the server from the default group with -exclude-default-group.
+    server 192.168.1.1 -group home -exclude-default-group
+    server 10.0.0.1 -group office -exclude-default-group
+    server 8.8.8.8
+    ```
+
+1. Configure the server group used for corresponding domain name resolution
+
+    ```shell
+    # Upstream server rules, .home domain names use servers in the home group for all queries
+    nameserver /home/home
+    # Upstream server rules, .office domain names use servers in the office group for all queries
+    nameserver /office/office
+    ```
+
+Similarly, home can be replaced with domestic, and office can be replaced with overseas.
+
+## More Abilities
+
+By configuring the above, DNS resolution forward can be realized. If you need to forward according to the requesting port, you can configure the second DNS server, and add the `--group` parameter to the `bind` configuration to specify the forward name.
+
+```shell
+bind :7053 -group office
+bind :8053 -group home
+```
+
+By configuring the above, requests to the 7053 port are all queried using the office group, and requests to the 8053 port are all queried using the home group.