Disable SSL and Mixed Mode Security

[sashakonor]

Hi,
I have some problem with /wstrust/mixed/username.
We have an ssl bridge in our network, that redirects http requests to https.
Is it possible to configure our Identity Server so that mixed mode security will work?
If I set Disable SSL to true, the /wstrust/mixed/username endpoint doesn't work, because in TokenServiceHostFactory in this case this endpoint isn't created.
If I set Disable SSL to false, I get a request looping.
Does it mean, that I should choose some other security mode? Or there's some way to make that scheme work?