diff --git a/lib/infra/infra-stack.ts b/lib/infra/infra-stack.ts
index 384644b95c2..8d0b1cd557d 100644
--- a/lib/infra/infra-stack.ts
+++ b/lib/infra/infra-stack.ts
@@ -403,6 +403,8 @@ export class InfraStack extends Stack {
     });
 
     const opensearchPortMap = `${props?.mapOpensearchPortTo ?? scope.node.tryGetContext('mapOpensearchPortTo')}`;
+    const opensearchDashboardsPortMap = `${props?.mapOpensearchDashboardsPortTo ?? scope.node.tryGetContext('mapOpensearchDashboardsPortTo')}`;
+
     if (opensearchPortMap === 'undefined') {
       if (!this.securityDisabled && !this.minDistribution) {
         this.opensearchPortMapping = 443;
@@ -413,6 +415,17 @@ export class InfraStack extends Stack {
       this.opensearchPortMapping = parseInt(opensearchPortMap, 10);
     }
 
+    if (opensearchDashboardsPortMap === 'undefined') {
+      this.opensearchDashboardsPortMapping = 8443;
+    } else {
+      this.opensearchDashboardsPortMapping = parseInt(opensearchDashboardsPortMap, 10);
+    }
+
+    if (this.opensearchPortMapping === this.opensearchDashboardsPortMapping) {
+      throw new Error('OpenSearch and OpenSearch-Dashboards cannot be mapped to the same port! Please provide different port numbers.'
+      + ` Current mapping is OpenSearch:${this.opensearchPortMapping} OpenSearch-Dashboards:${this.opensearchDashboardsPortMapping}`);
+    }
+
     if (!this.securityDisabled && !this.minDistribution && this.opensearchPortMapping === 443 && certificateArn !== 'undefined') {
       opensearchListener = nlb.addListener('opensearch', {
         port: this.opensearchPortMapping,
@@ -426,13 +439,6 @@ export class InfraStack extends Stack {
       });
     }
 
-    const opensearchDashboardsPortMap = `${props?.mapOpensearchDashboardsPortTo ?? scope.node.tryGetContext('mapOpensearchDashboardsPortTo')}`;
-    if (opensearchDashboardsPortMap === 'undefined') {
-      this.opensearchDashboardsPortMapping = 8443;
-    } else {
-      this.opensearchDashboardsPortMapping = parseInt(opensearchDashboardsPortMap, 10);
-    }
-
     if (this.dashboardsUrl !== 'undefined') {
       if (!this.securityDisabled && !this.minDistribution && this.opensearchDashboardsPortMapping === 443 && certificateArn !== 'undefined') {
         dashboardsListener = nlb.addListener('dashboards', {
diff --git a/test/opensearch-cluster-cdk.test.ts b/test/opensearch-cluster-cdk.test.ts
index a68fd5f52d5..d38edc4a520 100644
--- a/test/opensearch-cluster-cdk.test.ts
+++ b/test/opensearch-cluster-cdk.test.ts
@@ -987,3 +987,42 @@ test('Ignore cert and TLS protocol if none of the ports map to 443', () => {
     Protocol: 'TCP',
   });
 });
+
+test('Throw error on duplicate ports', () => {
+  const app = new App({
+    context: {
+      securityDisabled: false,
+      minDistribution: false,
+      distributionUrl: 'www.example.com',
+      cpuArch: 'x64',
+      singleNodeCluster: false,
+      dashboardsUrl: 'www.example.com',
+      distVersion: '1.0.0',
+      serverAccessType: 'ipv4',
+      restrictServerAccessTo: 'all',
+      certificateArn: 'arn:1234',
+      mapOpensearchPortTo: '8443',
+    },
+  });
+  // WHEN
+  try {
+    // WHEN
+    const networkStack = new NetworkStack(app, 'opensearch-network-stack', {
+      env: { account: 'test-account', region: 'us-east-1' },
+    });
+
+    // @ts-ignore
+    const infraStack = new InfraStack(app, 'opensearch-infra-stack', {
+      vpc: networkStack.vpc,
+      securityGroup: networkStack.osSecurityGroup,
+      env: { account: 'test-account', region: 'us-east-1' },
+    });
+
+    // eslint-disable-next-line no-undef
+    fail('Expected an error to be thrown');
+  } catch (error) {
+    expect(error).toBeInstanceOf(Error);
+    // @ts-ignore
+    expect(error.message).toEqual('OpenSearch and OpenSearch-Dashboards cannot be mapped to the same port! Please provide different port numbers. Current mapping is OpenSearch:8443 OpenSearch-Dashboards:8443');
+  }
+});