Apache 2.2 Reverse Proxy to NTLM authenticated Apache 1.3 servers

["Daniel T. Gynn" <dan.gynn@xxxxxxxxxxxx>]

I have two Apache 1.3 servers running on Windows that use NTLM to 
authenticate users.  I have added a third Windows server to load balance 
between the two.  I have installed Apache 2.2.8 on this server and set 
it up to Reverse Proxy.  This partially works, it will go to the correct 
server for a request and about half of the time, the page is 
authenticated transparently.  But the other half of the time, I am 
prompted for a username and password.  Does anyone know what I am missing?

Here are the pertinent parts of my Apache 2 config file:


LoadModule proxy_module modules/mod_proxy.so
#LoadModule proxy_ajp_module modules/mod_proxy_ajp.so
LoadModule proxy_balancer_module modules/mod_proxy_balancer.so
#LoadModule proxy_connect_module modules/mod_proxy_connect.so
#LoadModule proxy_ftp_module modules/mod_proxy_ftp.so
LoadModule proxy_http_module modules/mod_proxy_http.so

ProxyRequests Off
ProxyVia on

<Proxy *>
	Order deny,allow
	Allow from all
</Proxy>

ProxyPass /devel balancer://engsupport01First/
ProxyPassReverse /devel balancer://engsupport01First/
ProxyPreserveHost off
<Proxy balancer://engsupport01First/>
	BalancerMember http://10.2.13.60 loadfactor=1
	BalancerMember http://10.2.13.111 loadfactor=100
</Proxy>

ProxyPass / balancer://engweb01First/
ProxyPassReverse / balancer://engweb01First/
<Proxy balancer://engweb01First/>
	BalancerMember http://10.2.13.60 loadfactor=100
	BalancerMember http://10.2.13.111 loadfactor=1
</Proxy>

<Location /balancer-manager>
	SetHandler balancer-manager
</Location>

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