Apache Mutual TLS

https://hub.docker.com/r/mviveros/apache-mutual-tls

This image contains an Apache server configured with Mutual TLS which will allow your server to do client authentication in addition to server authentication.

Setup

1. Put your certs in ./certs/:

• server.crt and server.key - server certificate and key used for server authentication
• ca.crt - trusted root CA your server will allow client certificates signed by

1. Set the environment variables:

• ALLOWED_CLIENT_S_DN - allowed client certificate subject domain name, client certificates from other domains will result in a 403
• VERIFY_DEPTH (optional) - maximum client certificate chain length, defaults to 2 which will allow client certificates signed by one intermediate CA, set to 1 to only allow client certificates signed by the trusted root CA

1. Run it:

   docker run -p 443:443 --env ALLOWED_CLIENT_S_DN=example.com -v `pwd`/certs/:/usr/local/apache2/conf/certs mviveros/apache-mutual-tls

Test

Assuming you have client certs in client.crt/client.key and ca_server.crt contains the CA your server certificate is signed by, you can test it with:

curl -v --cert client.crt --key client.key --cacert ca_server.crt https://localhost:443

Links

• To see which specific configs were used to setup client authentication, check out commit 3d8b6cd
• Docs - https://httpd.apache.org/docs/2.4/ssl/ssl_howto.html#accesscontrol

Coming Soon

• support for adding a proxy header for client subject domain name