Configuring Proxy To Connect To Another Proxy

If there is a need to make an (inner) proxy cern_httpd connect to the outside world via another (outer) proxy server, you can use the same environment variables as are used to redirect clients to the proxy to make inner proxy use the outer one: E.g. your (inner) proxy server's startup script could look like this: 
        #!/bin/sh
        http_proxy=http://outer.proxy.server:8082/
        export http_proxy
        /usr/etc/httpd -r /etc/inner-proxy.conf -p 8081
This is a little ugly, so there are also the following directives in the configuration file:
httpd@info.cern.ch