Apache Reverse Proxy Proxy-Authentication: http header

Hello,

I am trying to add authentication to an Apache httpd web server being used as a reverse proxy.

There are (3) hosts:

1. A host with a vendor application JVM fat client console
2. A host with the Apache httpd web server
3. A host with a vendor application JVM server component

The reverse proxy works 100% without authentication enabled. Here is how I add authentication.

Listen 9006
NameVirtualHost *:9006
<VirtualHost *:9006>
<Proxy *>
    Order deny,allow
    Allow from all
    AuthType Basic
    AuthName "Client Tunnel HTTP Login Required"
    AuthUserFile C:\xampp\access\.htpasswd
    #AuthGroupFile C:\xampp\access\group.file
    Require valid-user
</Proxy>
ProxyRequests Off
ProxyHTMLEnable On
ProxyPass / http://192.168.56.102:8080/
ProxyPassReverse / http://192.168.56.102:8080/
AllowCONNECT 8080
</VirtualHost>

Code (markup):

The vendor application client allows me to enter the following values ([] indicates what I'm putting in the fields)

• Application Server Hostname or IP address and port [192.168.56.102:8080] which is host 3
• Application Server login credentials [user : password] which are working credentials
• Proxy Server Hostname or IP address and port [192.168.56.105:9006] which is host 2
• Proxy Server Credentials [apache : apache] which are working credentials

The problem is that the vendor fat client is passing the following HTTP header information:
'Proxy-Authentication: Basic YXBhY2hlOmFwYWNoZQ=='
'Credentials: apache:apache'
'Authentication: Basic ZHVtbXk6ZHVtbXk='
'Credentials: notused:notused'

The Apache web server reads the 'notused : notused' credentials, says that the user does not exist/not authorized, and returns a HTTP 401 error.

I cannot change the way the vendor application behaves. Is there a way to have my Apache web server read the Proxy-Authentication credentials instead of the Authentication credentials?

Thanks!