DCC HTTP Reverse Proxy returns 404 to /oam/server/obrareq.cgi?encquery.... request
After configuring DCC HTTP Reverse Proxy webgate per instructions here: https://blogs.oracle.com/dcarru/entry/dcc_http_reverse_proxy_with
Request for protected resource is redirected to DCC domain /oam/server/obrareq.cgi?encquery..... and fails with HTTP 404.
The DCC webgate is configured with 'Allow Credential Collector Operations' checked, and TunneledUrls=/oam,/oamfed in User Defined Parameters.
The application domain for the DCC webgate is configured with resources /../*, /oam/../*, and /oamfed/../* as Public resources.
The authentication scheme for the protected resource is configured to use a copy of the OOO LDAPScheme which has been modified to set the Challenge Redirect URL to (DCC domain)/oam/server, but is otherwise exactly the same as the OOO LDAPScheme.