OK.
Android app. No info what the app do if my “sprinkler page” (SSL frontend) is want HTTPS and different port.
I use name based virtual hosts for proxy.
I thought the secured connection is a must. I tried to help you test it. I don’t know your js or app how works. Of course I can watch it as a black box and I can use tcpdump to check the protocols both of the two side of the router.
I know you don’t have too much time.
Anyway, do you interested in this type of setup (SSL frontend with proxy)?
TIA,