diff --git a/README.md b/README.md
index d7ea8b1..a47a933 100644
--- a/README.md
+++ b/README.md
@@ -80,6 +80,7 @@ Mosdns config and auto update shell script.
 ├── config.yaml                   # main config
 ├── custom_rules                  # user custon rule, has higher priority
 │   ├── block.txt                 # block rule
+│   ├── ddns.txt                  # ddns rule, not cache if match
 │   ├── direct.txt                # forward local rule
 │   ├── host.txt                  # host rule
 │   ├── proxy.txt                 # forward remote rule
diff --git a/mosdnsv5/config.yaml b/mosdnsv5/config.yaml
index bc6f630..08bc0d0 100755
--- a/mosdnsv5/config.yaml
+++ b/mosdnsv5/config.yaml
@@ -1,5 +1,5 @@
 log:
-  level: debug # 日志级别。可选 "debug" "info" "warn" "error"。默认 "info"。
+  level: info # 日志级别。可选 "debug" "info" "warn" "error"。默认 "info"。
   file: '' # 记录日志到文件。默认输出至 stderr。
   production: true # 纯 json 输出。
 
@@ -12,6 +12,14 @@ api:
 include: []
 
 plugins:
+  - tag: ddns_domain
+    type: domain_set
+    args:
+      # exps:                                   # 域名表达式。
+      #   - "qq.com"
+      files:
+        - ./custom_rules/ddns.txt
+
   - tag: direct_domain
     type: domain_set
     args:
@@ -129,7 +137,7 @@ plugins:
       # - exec: prefer_ipv4
 
       - matches:
-          - '!qname ddns.doamin.com'
+          - '!qname $ddns_domain'
         exec: $mem_cache
       - matches:
           - has_resp
diff --git a/mosdnsv5/custom_rules/ddns.txt b/mosdnsv5/custom_rules/ddns.txt
new file mode 100644
index 0000000..e69de29