Added additional services section

Author: raboilla

articles/application-gateway/configuration-infrastructure.md

@@ -235,6 +235,22 @@ To use the route table to allow kubenet to work:
 
 Any scenario where 0.0.0.0/0 needs to be redirected through a virtual appliance, a hub/spoke virtual network, or on-premises (forced tunneling) isn't supported for v2.
 
+## Additional services
+
+To view roles and permissions for other services, see the following links:
+
+- [Azure ExpressRoute](../expressroute/roles-permissions.md) 
+
+- [Azure Firewall](../firewall/roles-permissions.md) 
+
+- [Azure Route Server](../route-server/roles-permissions.md)
+
+- [Azure Virtual WAN](../virtual-wan/roles-permissions.md)
+
+- [Managed NVA](../virtual-wan/roles-permissions.md#nva-resources)
+
+- [Azure VPN Gateway](../vpn-gateway/roles-permissions.md)
+
 ## Next steps
 
 - [Learn about frontend IP address configuration](configuration-frontend-ip.md)