Listen 5454

<VirtualHost *:5454>

SSLProxyEngine on
SSLProxyVerifyDepth 10
SSLProxyMachineCertificateChainFile "/path/to/ca/ca.crt"
SSLProxyMachineCertificateFile "/path/to/cert/cert_and_key.pem"
SSLProxyVerify require

ProxyRequests Off

<Proxy *>
  Require all granted
</Proxy>

ProxyPass / https://example.com/
ProxyPassReverse / https://example.com/

</VirtualHost>

curl http://localhost:5454

Listen 5454

<VirtualHost *:5454>

SSLProxyEngine on
SSLProxyVerifyDepth 10
SSLProxyMachineCertificateChainFile "/path/to/ca/ca.crt"
SSLProxyMachineCertificateFile "/path/to/cert/cert_and_key.pem"
SSLProxyVerify require

ProxyRequests On

<Proxy *>
Require all granted
</Proxy>

</VirtualHost>

curl --proxy http://localhost:5454 https://www.example.com
curl: (56) NSS: client certificate not found (nickname not specified)