May I know how I can configure something like this? We have APEX applications residing in different databases inside the firewall - different APEX versions. We want to replace our extranet's front-end, currently Oracle iAS 9i, with Oracle WebTier (Oracle HTTP Server) 184.108.40.206. However, with the new RESTful Service features, we would also like to add the APEX Listener for publishing webservices. Could you teach me the detail steps to implement this structure in our environment?You can use OHS as well as ApexListener to access the different Apex instances. However note that OHS and ApexListener will form completely independent paths to access the Apex instances. That is, when OHS URL is used ApexListener URL is not it use, and the other way round.
user's browser --HTTP--> Oracle WebTier Utilities (OHS) 220.127.116.11 -- AJP or HTTP--> firewall -->APEX--> Oracle database
If you replace OHS with Apache then it would be
user's browser --HTTP--> Oracle WebTier Utilities (OHS) 18.104.22.168 -- AJP or HTTP--> firewall -->GF-->ApexListener-->APEX --> Oracle database
user's browser -->HTTP--> Apache(reverse proxy) --> HTTP--> firewall -->GF-->ApexListener-->JDBC--> Oracle database