Performing Logon in SMP using Reverse Proxy

I am trying to perform LOGON mechanism in my enterprise application.For that I am trying to modify the code in index.js file.

Now in the SMP server Host what value should be entered.Please note in my application, I am trying to reach SMP via Reverse Proxy.

Also please let me know what else needs to be done to perform LOGON mechanism using REVERSE PROXY.

Thanks in advance.