Update application-gateway-faq.yml

Author: jaesoni

articles/application-gateway/application-gateway-faq.yml

@@ -259,7 +259,8 @@ sections:
           Yes. See [restrict access to specific source IPs](./configuration-infrastructure.md#allow-access-to-a-few-source-ips).
           
       - question: Can I use the same port for both public-facing and private-facing listeners?
-        answer: No.
+        answer: |
+          Yes, you can use public-facing and private-facing listeners with the same port number to simultaneously support both public and private clients (feature in Preview). Note that if a Network Security Group (NSG) is associated with your application gateway's subnet, a specific Inbound rule may be needed depending on its configuration. [Know more](./configuration-listeners.md#frontend-port).
 
       - question: Does Application Gateway support IPv6?
         answer: Application Gateway v2 doesn't currently support IPv6. It can operate in a dual stack VNet using only IPv4, but the gateway subnet must be IPv4-only. Application Gateway v1 doesn't support dual stack VNets.