diff --git a/acl/src/main/java/org/apache/rocketmq/acl/plain/RemoteAddressStrategyFactory.java b/acl/src/main/java/org/apache/rocketmq/acl/plain/RemoteAddressStrategyFactory.java
index 8db0fda990a53cb9deadb1db938fdcc61a38e7ca..0c3548eeb55d6e6f6520c62b94788c1d9fdeba1f 100644
--- a/acl/src/main/java/org/apache/rocketmq/acl/plain/RemoteAddressStrategyFactory.java
+++ b/acl/src/main/java/org/apache/rocketmq/acl/plain/RemoteAddressStrategyFactory.java
@@ -55,11 +55,15 @@ public class RemoteAddressStrategyFactory {
                 return new MultipleRemoteAddressStrategy(AclUtils.getAddresses(remoteAddr, last));
             } else {
                 String[] strArray = StringUtils.split(remoteAddr, ".");
-                String four = strArray[3];
-                if (!four.startsWith("{")) {
+                // However a right IP String provided by user,it always can be divided into 4 parts by '.'.
+                if (strArray.length < 4) {
+                    throw new AclException(String.format("MultipleRemoteAddressStrategy has got a/some wrong format IP(s) ", remoteAddr));
+                }
+                String lastStr = strArray[strArray.length - 1];
+                if (!lastStr.startsWith("{")) {
                     throw new AclException(String.format("MultipleRemoteAddressStrategy netaddress examine scope Exception netaddress", remoteAddr));
                 }
-                return new MultipleRemoteAddressStrategy(AclUtils.getAddresses(remoteAddr, four));
+                return new MultipleRemoteAddressStrategy(AclUtils.getAddresses(remoteAddr, lastStr));
             }
         } else if (AclUtils.isComma(remoteAddr)) {
             return new MultipleRemoteAddressStrategy(StringUtils.split(remoteAddr, ","));
diff --git a/acl/src/test/java/org/apache/rocketmq/acl/plain/RemoteAddressStrategyTest.java b/acl/src/test/java/org/apache/rocketmq/acl/plain/RemoteAddressStrategyTest.java
index 8998dd993ccbcf75c9788fd8cf314c4c93f58771..87eb37bdf2f18e73f3c099523118b81c30f957dd 100644
--- a/acl/src/test/java/org/apache/rocketmq/acl/plain/RemoteAddressStrategyTest.java
+++ b/acl/src/test/java/org/apache/rocketmq/acl/plain/RemoteAddressStrategyTest.java
@@ -198,6 +198,16 @@ public class RemoteAddressStrategyTest {
         remoteAddressStrategyFactory.getRemoteAddressStrategy(plainAccessResource);
         plainAccessResource.setWhiteRemoteAddress("::1,2,3}");
         remoteAddressStrategyFactory.getRemoteAddressStrategy(plainAccessResource);
+        plainAccessResource.setWhiteRemoteAddress("192.168.1.{1}");
+        remoteAddressStrategyFactory.getRemoteAddressStrategy(plainAccessResource);
+        plainAccessResource.setWhiteRemoteAddress("192.168.1.{1,2}");
+        remoteAddressStrategyFactory.getRemoteAddressStrategy(plainAccessResource);
+        plainAccessResource.setWhiteRemoteAddress("192.168.{1}");
+        remoteAddressStrategyFactory.getRemoteAddressStrategy(plainAccessResource);
+        plainAccessResource.setWhiteRemoteAddress("{192.168.1}");
+        remoteAddressStrategyFactory.getRemoteAddressStrategy(plainAccessResource);
+        plainAccessResource.setWhiteRemoteAddress("{192.168.1.1}");
+        remoteAddressStrategyFactory.getRemoteAddressStrategy(plainAccessResource);
     }
 
     private void multipleNetaddressStrategyTest(RemoteAddressStrategy remoteAddressStrategy) {