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From Philippe DEBAT <diamon...@excite.com>
Subject mod_proxy/3027: ProxyPass whith authentication, use PROXY-Authenticate header, and not WWW-Authenticate
Date Fri, 18 Sep 1998 09:51:38 GMT

>Number:         3027
>Category:       mod_proxy
>Synopsis:       ProxyPass whith authentication, use PROXY-Authenticate header, and not
WWW-Authenticate
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    apache
>State:          open
>Class:          sw-bug
>Submitter-Id:   apache
>Arrival-Date:   Fri Sep 18 04:10:00 PDT 1998
>Last-Modified:
>Originator:     diamondia@excite.com
>Organization:
apache
>Release:        1.3.1
>Environment:
every OS
>Description:
I was using a web server apache 1.2.6 as a reverse proxy, in front of another web server,
with directives like 'ProxyPass'.
Some URL's 'proxied' were protected by password (using Basic authentication and 'require'
feature). All was working well.
I migrate to version 1.3.1 and it is not working. In fact it returned a '407' error code,
in case of accessing a protected URL. It's working only 
if you declare my 'reverse proxy' server as your proxy server in your browser.
But it's not working if you access Internet already through a proxy !.
>How-To-Repeat:
Configure 2 apache web servers with one as a reverse proxy, with at least one proxied URL

protected by password.
>Fix:
In the code of Apache 1.3.1 you use only 2 values (0 and 1) with 'r->proxyreq' to distinguish
proxy requests and normal requests. I suggest to use a third value (2 for example) to 
identify a 'pseudo proxy request' used by 'ProxyPass', and modify the tests
'r-proxyreq ?' whith 'r->proxyreq == 1' in file http_protocol.c. All the files concerned
are
request.c, http_protocol.c, mod_proxy.c (function proxy_trans, r->proxyreq = 2 after (len
> 0)), mod_digest.c.
I implement this change and it's working fine.
>Audit-Trail:
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