After adding the following overrides into our communityserver_override.config file:
<Override xpath="/CommunityServer/Core"
mode="new" name="overrideBaseUrl"
value="www2.testdomain.com/.../>
<Override xpath="/CommunityServer/Core"
mode="new" name="overrideWebPort"
value="443"/>
we have been able to successfully browse the content behind our F5 LB.
We are experiencing a problem that some requests are resolving using the port and base url overrides, while other requests are not.
www2.testdomain.com/Telligent/login.aspx – login as admin and then go to Control Panel > System Administration > Membership Administration > Search for % > Click any of the accounts to view profile
some content will route to the internal address in our case IIS:15000, and other requests route to the override port mentioned above which is what the F5 (ssl) is translating traffic to.