Bypass Outpost Authentication Between a Transparent Proxy

**Describe your question/**
How to bypass Outpost authentication between a transparent proxy on Authentik?
For example, both a.com and b.com have Outpost.
a.com needs to access b.com, but authentication is still required.

how to something like whitelist it? is it possible to using expression policy?

**Relevant info**
2025.2.1

No files, tests, or entry points are named. Start by reading the transparent proxy and expression policy documentation, then verify whether a supported service-to-service bypass exists; done means documenting a confirmed configuration or determining that the request needs a product change.

Written by the indexing model from the issue text.