diff --git a/maku-framework/src/main/java/net/maku/framework/common/utils/IpUtils.java b/maku-framework/src/main/java/net/maku/framework/common/utils/IpUtils.java
index 33d1bb4..91709f8 100644
--- a/maku-framework/src/main/java/net/maku/framework/common/utils/IpUtils.java
+++ b/maku-framework/src/main/java/net/maku/framework/common/utils/IpUtils.java
@@ -92,34 +92,29 @@ public class IpUtils {
      * @param addr byte地址
      */
     private static boolean internalIp(byte[] addr) {
-        if (addr == null || addr.length < 2) {
-            return true;
+        if (addr == null)  return true;
+
+        // IPv6地址处理
+        if (addr.length == 16) {
+            return (addr[0] & 0xFE) == 0xFC; //RFC4193标准：fc00::/7
         }
+
+        // IPv4地址长度校验
+        if (addr.length != 4) return true;
+
         final byte b0 = addr[0];
         final byte b1 = addr[1];
-        // 10.x.x.x/8
-        final byte SECTION_1 = 0x0A;
-        // 172.16.x.x/12
-        final byte SECTION_2 = (byte) 0xAC;
-        final byte SECTION_3 = (byte) 0x10;
-        final byte SECTION_4 = (byte) 0x1F;
-        // 192.168.x.x/16
-        final byte SECTION_5 = (byte) 0xC0;
-        final byte SECTION_6 = (byte) 0xA8;
-        switch (b0) {
-            case SECTION_1:
-                return true;
-            case SECTION_2:
-                if (b1 >= SECTION_3 && b1 <= SECTION_4) {
-                    return true;
-                }
-            case SECTION_5:
-                if (b1 == SECTION_6) {
-                    return true;
-                }
-            default:
-                return false;
+
+        // 10.0.0.0/8
+        if (b0 == 0x0A) return true;
+
+        // 172.16.0.0/12
+        if (b0 == (byte)0xAC) {
+            return (b1 >= 0x10 && b1 <= 0x1F);
         }
+
+        // 192.168.0.0/16
+        return (b0 == (byte)0xC0) && (b1 == (byte)0xA8);
     }
 
     /**