I have set up my cp/sb/sab to all be externally available to me using the following (nginx proxy + ssl):

These are all accessible via certificate auth (which I have on my phone, laptop, desktop, etc).

However, nzb360 isn't attempting to use a cert to handle the request to these sites, and instead fails.

nzb360 request to couchpotato: - - [09/Jul/2014:12:49:32 -0700] "GET /api/asdfasdfasdfasdf/dashboard.soon/ HTTP/1.1" 400 252 "-" "Dalvik/1.6.0 (Linux; U; Android 4.4.4; Nexus 5 Build/KTU84P)"

copy pasting the request onto my laptop: - - [09/Jul/2014:12:49:42 -0700] "GET /api/asdfasdfasdfasdf/dashboard.soon/ HTTP/1.1" 200 7590 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.1916.153 Safari/537.36"

Is there any way to get nzb360 to actually recognize that the site is requesting a certificate and provide one appropriately?
I have the exact same problem. I asked this on r/usenet as well, Kev started answering but I have no news since, maybe he is on vacation, anyway certificate authentication don't seem to be supported as it is.
Hey guys, this is going to be hard to debug for me, since I don't have any certs on my setup. Would one of you be willing to set up a test environment for me to debug with?
Hi !

Sorry for being late, RustyBower might have already sent you a testing environment, if you still need something I'm ready to help ! Just let met know.

I was wondering if there has been any progress on this? Mutual Authentication is awesome, I would love to be able to use it with this app. As it is I'm having to use a VPN client for this single app.