11 KiB
Building an image for an SBC or Virtual Machine
You don't have to trust images downloaded from random internet locations signed with untrusted keys. You can build one from scratch yourself, and this is the recommended procedure for maximum security. For guidance on how to build images see the manpage for the freedombone-image command.
Install the freedombone commands onto your laptop/desktop:
sudo apt-get install git build-essential dialog
git clone https://github.com/bashrc/freedombone
cd freedombone
sudo make installThen install packages needed for building images:
sudo apt-get -y install python-docutils mktorrent vmdebootstrap
sudo apt-get -y install dosfstools btrfs-tools extlinux python-distro-info mbr
sudo apt-get -y install qemu-user-static binfmt-support u-boot-tools qemuA typical use case to build an 8GB image for a Beaglebone Black is as follows. You can change the size depending upon the capacity of your microSD card.
freedombone-image -t beaglebone -s 8GIf you prefer an advanced installation with all of the options available then use:
freedombone-image -t beaglebone -s 8G --minimal noTo build a 64bit Virtualbox image:
freedombone-image -t virtualbox-amd64 -s 8GTo build a 64bit Qemu image:
freedombone-image -t qemu-x86_64 -s 8GOther supported boards are cubieboard2, cubietruck and olinuxino-lime2.
Checklist
Before installing Freedombone you will need a few things.
- Have some domains, or subdomains, registered with a dynamic DNS service
- System with a new installation of Debian Jessie or a downloaded/prepared disk image
- Ethernet connection between the system and your internet router
- That it is possible to forward ports from the internet router to the system, typically via firewall settings
- Have ssh access to the system, typically via fbone@freedombone.local on port 2222
Mesh network
If you are installing one of the mesh network variants then see these instructions for details.
Installation
There are three install options: Laptop/Desktop/Netbook, SBC and Virtual Machine.
On a Laptop, Netbook or Desktop machine
If you have an existing system, such as an old laptop or netbook which you can leave running as a server, then install a new version of Debian Jessie onto it. During the Debian install you won't need the print server or the desktop environment, and unchecking those will reduce the attack surface. Once Debian enter the following commands:
su
apt-get update
apt-get -y install git dialog build-essential
git clone https://github.com/bashrc/freedombone
cd freedombone
make install
freedombone menuconfigOn a single board computer (SBC)
Currently the following boards are supported:
If there is no existing image available then you can build one from scratch. See the section above on how to do that. If an existing image is available then you can download it and check the signature with:
gpg --verify filename.img.ascAnd the hash with:
sha256sum filename.imgIf the image is compressed then decompress it with:
tar -xjvf filename.tar.bz2Then copy it to a microSD card. Depending on your system you may need an adaptor to be able to do that.
sudo dd bs=1M if=filename.img of=/dev/sdX conv=fdatasyncWhere sdX is the microSD drive. You can check which drive is the microSD drive using:
ls /dev/sd*With the drive removed and inserted. Copying to the microSD will take a while, so go and do something less boring instead. When it's complete remove it from your system and insert it into the SBC. Connect an ethernet cable between the SBC and your internet router, then connect the power cable. On the Beaglebone Black you will see some flashing LEDs, but on other SBCs there may not be any visual indication that anything is booting.
With the board connected and running you can ssh into the system with:
ssh fbone@freedombone.local -p 2222Using the password 'freedombone'. Take a note of the new login password and then you can proceed through the rest of the installation.
As a Virtual Machine
Virtualbox and Qemu are supported. You can run a 64 bit Qemu image with:
qemu-system-x86_64 filename.imgIf you are using Virtualbox then add a new VM and select the Freedombone vdi image.
The default login will be username 'fbone' and password 'freedombone'. Take a note of the new login password and then you can proceed through the rest of the installation.
Social Key Management (aka 'The Unforgettable Key')
During the install procedure you will be asked if you wish to import GPG keys. If you don't already possess GPG keys then just select "Ok" and they will be generated during the install. If you do already have GPG keys then there are a few possibilities
You have the gnupg keyring on an encrypted USB drive
If you previously made a master keydrive containing the full keyring (the .gnupg directory). This is the most straightforward case, but not as secure as splitting the key into fragments.
You have a number of key fragments on USB drives retrieved from friends
If you previously made some USB drives containing key fragments then retrieve them from your friends and plug them in one after the other. After the last drive has been read then remove it and just select "Ok". The system will then try to reconstruct the key. For this to work you will need to have previously made three or more /free/freedomboneeee/src/commit/e0c30a3e25067e6cb8828844a0b64693adf0d383/doc/EN/Keydrives.
You can specify some ssh login details for friends servers containing key fragments
Enter three or more sets of login details and the installer will try to retrieve key fragments and then assemble them into the full key. This only works if you previously were using remote backups and had social key management enabled.
Final Setup
Any manual post-installation setup instructions or passwords can be found in /home/username/README. You should remove any passwords from that file and store them within a password manager such as KeepassX.
On your internet router, typically under firewall settings, open the following ports and forward them to your server.
| Service | Ports |
|---|---|
| HTTP | 80 |
| HTTPS | 443 |
| SSH | 2222 |
| DLNA | 1900 |
| DLNA | 8200 |
| XMPP | 5222..5223 |
| XMPP | 5269 |
| XMPP | 5280..5281 |
| IRC | 6697 |
| IRC | 9999 |
| Git | 9418 |
| 25 | |
| 587 | |
| 465 | |
| 993 | |
| VoIP | 64738 |
| VoIP | 5060 |
| Tox | 33445 |
| IPFS | 4001 |
Keydrives
After installing for the first time it's a good idea to create some keydrives. These will store your gpg key so that if all else fails you will still be able to restore from backup. There are two ways to do this:
Master Keydrive
This is the traditional security model in which you carry your full keyring on an encrypted USB drive. To make a master keydrive first format a USB drive as a LUKS encrypted drive. In Ubuntu this can be done from the Disk Utility application. Then plug it into the Freedombone system, then from your local machine run:
ssh myusername@mydomainname -p 2222
sudo controlSelect Backup and Restore then Backup GPG key to USB (master keydrive).
Fragment keydrives
This breaks your GPG key into a number of fragments and randomly selects one to add to the USB drive. First format a USB drive as a LUKS encrypted drive. In Ubuntu this can be done from the Disk Utility application. Plug it into the Freedombone system then from your local machine run the following commands:
ssh myusername@mydomainname -p 2222
sudo controlSelect Backup and Restore then Backup GPG key to USB (fragment keydrive).
Fragments are randomly assigned and so you will need at least three or four keydrives to have enough fragments to reconstruct your original key in a worst case scenario. You can store fragments for different Freedombone systems on the same encrypted USB drive, so you can help to ensure that your friends can also recover their systems. This might be called "the web of backups" or "the web of encryption". Since you can only write a single key fragment from your Freedombone system to a given USB drive each friend doesn't have enough information to decrypt your backups or steal your identity, even if they turn evil. This is based on the assumption that it may be difficult to get three or more friends to conspire against you all at once.
On Client Machines
You can configure laptops or desktop machines which connect to the Freedombone server in the following way. This alters encryption settings to improve overall security.
sudo apt-get update
sudo apt-get install git dialog haveged build-essential
git clone https://github.com/bashrc/freedombone
cd freedombone
sudo make install
freedombone-clientAdministering the system
To administer the system after installation log in via ssh, become the root user and then launch the control panel.
ssh myusername@freedombone.local -p 2222
sudo controlFrom there you will be able to perform various tasks, such as backups, adding and removing users and so on. You can also do this via commands, which are typically installed as /usr/local/bin/freedombone* and the corresponding manpages.