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From Krist van Besien <>
Subject Re: [users@httpd] connecting two apache http servers
Date Tue, 03 Feb 2009 07:42:56 GMT
On Tue, Feb 3, 2009 at 5:42 AM, Jake Vang <> wrote:
> Thanks for the link. I tried to implement it according to that site.
> However, I keep getting a permission denied error.

What do you have in the error log?

> Could this permission error be related to the fact that server1 and server2
> are both running on SSL? I am running Ubuntu 8.10, and I've already enabled
> mod_proxy (a2enmod proxy). Is there any other module I need to enable?

You might have to explicitely allow access to <Location /site2>, also
proxing to ssl is not something that usually works out of the box. You
have two options here.
- Enable http on your site2 (in a way that only access from the other
apache is permitted),
-  setup SSLProxying.

Apache can't proxy to https urls out of the box. You need to do some work.

you need to add the following to your config.
--- begin config ---
# turn on SSL proxying.
SSLProxyEngine On

# to tell Apache where to find CA certificates to check remote server
certificates with:
# (You can choose yourself where you put these certificates)
SSLProxyCACertificatePath /path/to/ca/certificates.
--- end config ---

Then in this path you need to put the CA certificate(s) used to sign
the certificate(s) used by the server(s) you communicate with. If you
want to talk to a server that uses a "self signed" certificate you
will need to put it in this dir too. (Remember that Apache is acting
as a HTTPS client here)

Once you've done that you need to run c_rehash in that directory.
c_rehash is part of a standard openssl distribution. c_rehash creates
hashed aliases in this dir. Apache needs these.

In order to test if everything is there you can do the following:

openssl s_client -CApath /path/to/ca/certificates -connect remoteserver:8443

if the conenction succeeds just try to do a
GET /something/



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