http://httpd.apache.org/docs/2.2/mod/mod_proxy.html

X-Forwarded-For
   The IP address of the client.
X-Forwarded-Host
   The original host requested by the client in the Host HTTP request header.
X-Forwarded-Server
   The hostname of the proxy server.

http://docs.docker.com/installation/ubuntulinux/#ubuntu-precise-1204-lts-64-bit Update to latest release(now 1.0) This is the way stated to install docker for 12.04 LTS in official document and noticed in ubuntuupdates.org, which looks work for 14.04 as well. Refer the command to Getting Docker Installed on Ubuntu 12.04 LTS as well $ wget -qO- https://get.docker.io/gpg | sudo apt-key add - $ sudo sh -c "echo deb http://get.docker.io/ubuntu docker main > /etc/apt/sources.list.d/docker.list" $ sudo apt-get update $ sudo apt-get install lxc-docker Now I get $ docker -v Docker version 1.0.0, build 63fe64c lxc-docker will remove old docker package, therefore please backup the configuration in advance. Not sure whether this can be treated "trusted" upgrade, need expert to comments, so far, looks good for me.

Hodor

http://www.codelitt.com/blog/my-first-10-minutes-on-a-server-primer-for-securing-ubuntu/

PermitRootLogin no PasswordAuthentication no AllowUsers deploy@(your-VPN-or-static-IP) AddressFamily inet