diff --git a/api/apimodel.go b/api/apimodel.go
index b787079ed..176f6f10a 100644
--- a/api/apimodel.go
+++ b/api/apimodel.go
@@ -47,6 +47,7 @@ type Config struct {
 	DeviceLimit         int     `mapstructure:"DeviceLimit"`
 	RuleListPath        string  `mapstructure:"RuleListPath"`
 	DisableCustomConfig bool    `mapstructure:"DisableCustomConfig"`
+	PrivateIP           string  `mapstructure:"PrivateIP"`
 }
 
 // NodeStatus Node status
diff --git a/api/fac/fac.go b/api/fac/fac.go
index 5ea81c3bb..49b514d75 100644
--- a/api/fac/fac.go
+++ b/api/fac/fac.go
@@ -61,8 +61,7 @@ func New(apiConfig *api.Config) *APIClient {
 	client.SetBaseURL(apiConfig.APIHost)
 	// Create Key for each requests
 	client.SetQueryParam("key", apiConfig.Key)
-	// Add support for muKey
-	client.SetQueryParam("muKey", apiConfig.Key)
+	client.SetQueryParam("private_ip", apiConfig.PrivateIP)
 	// Read local rule list
 	localRuleList := readLocalRuleList(apiConfig.RuleListPath)
 
diff --git a/config.yaml b/config.yaml
index 644d639f5..57d0b128c 100644
--- a/config.yaml
+++ b/config.yaml
@@ -17,6 +17,7 @@ Nodes:
       NodeID: test-node-westus-01.dev.slow-access.work
       NodeType: Shadowsocks-Plugin # Node type: V2ray, Trojan, Shadowsocks, Shadowsocks-Plugin
       Timeout: 30 # Timeout for the api request
+      PrivateIP: "192.168.1.100"
     ControllerConfig:
       ListenIP: 0.0.0.0 # local listen address
       SendIP: 0.0.0.0 # outbound interface ip