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From "Boyle Owen" <>
Subject RE: [users@httpd] "Error string not specified yet: proxy: request failed to..."
Date Fri, 22 Apr 2005 08:28:19 GMT
Plain text please...

Obvious question: Is port 443 open on the intermediate FW?

But a quick check on google (hint, hint...) reveals this is the error you get when trying
to pass through a proxy with an HTTP method that is not supported by the proxy.

Check out this message and the faq link therein (it's about subversion but it's the same problem).

In your case, the client must use the CONNECT method to tell the proxy to pass the requests
directly to the internal server. For this to work you need:

- mod_proxy_connect (not just mod_proxy)
- AllowCONNECT 443 (or not present - this is the default)
see for details.

Owen Boyle
Disclaimer: Any disclaimer attached to this message may be ignored. 

-----Original Message-----
From: Escudero, Peter Louis []
Sent: Freitag, 22. April 2005 01:45
Subject: [users@httpd] "Error string not specified yet: proxy: request failed to..."
Importance: High

I have a SunFire V210 running Solaris 9 (4/04), Apache v2.0.53 & OpenSSL v0.9.7g, configured
as a reverse-proxy for the real webserver, a Dell PE1750 running Windows Server 2003 &
IIS 6.0. In between them is a Cisco PIX firewall & a Cisco CSS. Regular http works fine,
but secure http gives me the following error:

[error] (20014)Error string not specified yet: proxy: request failed to (

What the heck is going on here? Any info you can provide will be greatly appreciated.
Peter Escudero 

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