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System Preparation

Add the Moonshot libraries.

If you have not already done so, you first need to follow the instructions on how to install the Moonshot Libraries on Ubuntu 12.04 LTS.

Configure APT

Ubuntu 12.04 LTS currently ships with OpenSSH v6, whereas our Moonshot-enabled OpenSSH is v5.9. We must tell apt that the Moonshot repository has precedence over the official Debian repositories so that you can install our OpenSSH, and not have it reverted back to the non Moonshot-enabled system provided OpenSSH next time you do an apt-get upgrade.

  1. Create a file called /etc/apt/preferences.d/moonshot, with the following content:
     

    Code Block
    linenumberstrue
    Package: *
    Pin: release o=moonshot
    Pin-Priority: 1200

Ensure that your hostname is correct

The channel bindings check requires that the hostname of your SSH server match the hostname people are SSHing to. That is, the output of the "hostname" command should match the FQDN of the server. If it doesn't, change /etc/hostname to make it so. 

Install updated libmemcached packages

Ubuntu 12.04 LTS ships with a version of libmemcached that is a little too old for Moonshot. We need to update these packages with newer version.

  1. Download the following package:
    1. http://old-releases.ubuntu.com/ubuntu/pool/main/libm/libmemcached/libmemcached10_1.0.8-1_amd64.deb
  2. Install it:

    Code Block
    languagebash
    $ dpkg -i libmemcached10_1.0.8-1_amd64.deb

Installation Instructions

  1. Install the Moonshot-enabled pre-compiled OpenSSH packages using apt. This will replace the system provided OpenSSH.

    Code Block
    languagebash
    $ apt-get install ssh openssh-server openssh-client libapache2-mod-shib2

Configuration Instructions

Once installed, the Moonshot-enabled OpenSSH server will still need a few quick tweaks in order to turn on the Moonshot support.

  1. Configure the OpenSSH server to use Moonshot by editing /etc/ssh/sshd_config. Check the following lines are present and uncommented:

    Code Block
    linenumberstrue
    UsePrivilegeSeparation no
    GSSAPIAuthentication yes
    GSSAPIKeyExchange yesno
    GSSAPIStrictAcceptorCheck yes
    
  2. Now restart the OpenSSH server

    Code Block
    $ /etc/init.d/ssh restart
  3. Configure the OpenSSH Client.