Alex below config seems to be working now , the only difference i see between my earlier conf and below config is location of these values , (proxyvia on , proxy requests on) , and disabling of SSLProxyEngine On
Thanks for all your help on this *Working Config * Listen 172.16.130.2:8080 <http://172.16.135.4:8080> <VirtualHost 172.16.130.2:8080 <http://172.16.135.4:8080>> LoadModule setenvif_module modules/mod_setenvif.so #SSLProxyEngine On #ProxyRequests On #ProxyVia On SSLCertificateFile /etc/pki/tls/certs/1.cert SSLCertificateKeyFile /etc/pki/tls/private/1.key SSLCACertificateFile /etc/pki/tls/certs/intermediate.crt SSLProxyEngine On ProxyRequests On ProxyVia On <Proxy "*"> <RequireAny> Require expr %{HTTP_HOST} =~ /^example.com:443$/ Require expr %{HTTP_HOST} =~ /^crl3.digicert.com:80$/ </RequireAny> </Proxy> </VirtualHost>