In case it helps this is the CF_TRACE of the UAA call that the ssh plugin
is expecting to be a redirect.

REQUEST: [2015-10-28T17:25:11-06:00]
POST /oauth/token HTTP/1.1
Host: uaa.{redacted}
Accept: application/json
Authorization: [PRIVATE DATA HIDDEN]
Content-Type: application/x-www-form-urlencoded
User-Agent: go-cli 6.12.3-5364935 / linux

grant_type=refresh_token&refresh_token={token redacted}&scope=

RESPONSE: [2015-10-28T17:25:12-06:00]
HTTP/1.1 200 OK
Connection: close
Transfer-Encoding: chunked
Cache-Control: no-cache, no-store, max-age=0, must-revalidate
Cache-Control: no-store
Content-Type: application/json;charset=UTF-8
Date: Wed, 28 Oct 2015 23:25:12 GMT
Expires: 0
Pragma: no-cache
Pragma: no-cache
Server: Apache-Coyote/1.1
X-Cf-Requestid: 4a6ad262-07e6-48a8-4640-271996e9bf64
X-Content-Type-Options: nosniff
X-Frame-Options: DENY
X-Xss-Protection: 1; mode=block

a20
{"access_token":"[PRIVATE DATA
HIDDEN]","token_type":"bearer","refresh_token":"[PRIVATE DATA
HIDDEN]","expires_in":3599,"scope":"scim.userids cloud_controller.read
password.write cloud_controller.write openid doppler.firehose scim.read
cloud_controller.admin","jti":"00e07ad7-5090-42e9-8096-a542dffd6026"}
0

This is the ssh-proxy client info returned from a call to uaac clients:

ssh-proxy
scope: cloud_controller.read cloud_controller.write openid
resource_ids: none
authorized_grant_types: authorization_code refresh_token
redirect_uri: /login
autoapprove: true
action: none
authorities: uaa.none
lastmodified: 1446074693000


Mike