Forcing URL through WFE or Load Balancer

Just walked into a new environment.  They have one load balancer, two WFEs below that, two app servers running all services below that.  The de-facto administrator had created a handful of web applications in central administration, but did so using a specific app server, not a web front end.  Then a user created a big site with a lot of content using the app server URL  http://server:2633/sites/....

What I need is for the site to be accessed through the load balanced URL.  I don't want anyone going directly to any specific server, especially not an app server directly.

I'm a developer, not an admin.  Can someone tell me how I can accomplish this?  By the way, they have a handful of site collections in each web application and all site collections are in the same default content database.

Thanks