Slackware

The original Linux distribution, geared towards power and stability.

http://www.slackware.com

Vagrant on Slackware 14 32 bit

Ruby version: ruby 1.9.3p429 (2013-05-15 revision 40747) [x86_64-linux]

VirtualBox version, Oracle VM VirtualBox Manager 4.2.8

Install Vagrant from source

Based on https://github.com/mitchellh/vagrant/wiki/Installing-Vagrant-from-source

As root run the following:

cd /tmp
mkdir gitVagrant
cd gitVagrant
git clone https://github.com/mitchellh/vagrant.git
cd vagrant
gem install bundle #it may not be installed
bundle install
rake install
vagrant -v #check vagrant version

Install VirtualBox on Slackware 14 32 bit

Get VirtualBox 4.2.8 for Linux, i386, all distributions http://download.virtualbox.org/virtualbox/4.2.8/VirtualBox-4.2.8-83876-Linux_x86.run.

For 4.2.18 http://download.virtualbox.org/virtualbox/4.2.18/VirtualBox-4.2.18-88781-Linux_x86.run

As root run the following commands:

cd <place where the downloaded virtualbox installer is>
chmod 755 VirtualBox-4.2.8-83876-Linux_x86.run
./VirtualBox-4.2.8-83876-Linux_x86.run
usermod -a -G vboxusers <username>
id <username> #check user groups

As a normal user run the following:

virtualbox --help # check the version and parameters
virtualbox #start virtualbox

Get and run a base box - Ubuntu Lucid32

In http://www.vagrantbox.es/ there is a list of available vagrant boxes.

As normal user run the following

mkdir -p /tmp/vgbox
cd /tmp/vgbox
wget http://files.vagrantup.com/lucid32.box #Ubuntu 10.04 LTS
vagrant box add UbuntuLucid32 lucid32.box
vagrant init UbuntuLucid32
vagrant up
vagrant ssh #access the VM through SSH
ping www.sapo.pt #inside VM ... does not reply
exit
vagrant suspend

Run the following as stated in http://serverfault.com/questions/453185/vagrant-virtualbox-dns-10-0-2-3-not-working:

VBoxManage list vms
VBoxManage modifyvm "vgbox_1372194938" --natdnsproxy1 on
VBoxManage modifyvm "vgbox_1372194938" --natdnshostresolver1 on
vagrant resume
vagrant ssh
ping www.sapo.pt # OK ! it gets ping replies
dpkg -l | more # show all installed packages

Running cat /etc/debian_version show its based on squeeze/sid.

Running cat /etc/issue.net show it's Ubuntu 10.04.4 LTS http://releases.ubuntu.com/lucid/.

Current user and pass for the lucid32 box is vagrant vagrant. To get superuser access run sudo bash.

Inspecting the file /etc/shadow we can see that only the user vagrant has a password defined.

In /etc/sudoers it is said that all users belonging to group can gain root privileges with supplying a password.

In /etc/group it is stated that vagrant belongs to the admin group.

Ubuntu Precise32

In http://www.vagrantbox.es/ there is a list of available vagrant boxes.

As normal user run the following

mkdir -p ~/Downloads/vagrantBoxes/
cd ~/Downloads/vagrantBoxes/
wget http://files.vagrantup.com/precise32.box #Ubuntu 12.04 LTS
mkdir -p /tmp/precise32
cd /tmp/precise32
vagrant box add UbuntuPrecise32 ~/Downloads/vagrantBoxes/precise32.box
vagrant init UbuntuPrecise32
vagrant up
vagrant ssh #access the VM through SSH
ping www.sapo.pt
exit
vagrant suspend

Slackware NAT router with Pen 3G

Configure Slackware PC to share a 3G internet connection (TMN portuguese ISP).

Internet connection

The used APN is internet.

There is no PIN defined in the used SIM card.

Edit /etc/ppp/peers/tmnpub

/dev/ttyUSB0
460800
connect 'chat -v -f /etc/ppp/chat/tmnpub'
defaultroute
usepeerdns

Edit /etc/ppp/chat/tmnpub

ABORT 'BUSY'
ABORT 'NO CARRIER'
ABORT 'ERROR'
ABORT 'SIM PIN'
ABORT 'SIM PUK'
'' AT
OK AT+CGDCONT=1,"IP","internet"
OK AT+CPIN?
READY ATDT*99#
CONNECT

To connect to the internet we must use the command:

pppd call tmnpub

Using the command ifconfig we should see the device ppp0 in the output.

Issuing a command ping www.google.com we should get a reply with the IP address from Google.

Configure NAT (Network Address Translation) router

Translate internal network addresses (source address) to a public/usable IP address given to the 3G modem.

View the routing table:

route -n

It should appear the devices ppp0 and eth0, and based on the Destination and Netmask the destination interface.

Enable IP forwarding:

echo 1 > /proc/sys/net/ipv4/ip_forward

Configure iptables to translate the address after they are forwarded to the correct interface, from eth0 to ppp0:

iptables -F
iptables -t nat -A POSTROUTING -o ppp0 -j MASQUERADE

To view the iptables configuration run the commands:

iptables -L -t nat -v
iptables -L -t filter -v

#script
#Enable IP forwarding:
echo 1 > /proc/sys/net/ipv4/ip_forward
#Configure iptables to translate the address after they are forwarded to the correct interface, from eth0 to ppp0:
iptables -F
iptables -t nat -A POSTROUTING -o ppp0 -j MASQUERADE

Configure client computer

The routing table must be configure to use the NAT on Slackware, that will act as a router.

Check the current default gateway:

route -n

The line with destination equal to 0.0.0.0 and gateway 0.0.0.0, is the default router/gateway and must be deleted. We must run a command to do that, adapted to the current situation:

route del -net 0.0.0.0 gw 192.168.1.1

The previous command is to delete a route with destination 0.0.0.0 and gateway 192.168.1.1.

If the NAT router have the IP 192.168.1.123 then the following command must be sent:

route add default gw 192.168.1.123
route -n

After that running route -n should return a line with:

Gateway: 192.168.1.123
Netmask: 0.0.0.0
Destination: 0.0.0.0
Iface: eth0

Running a ping www.google.com from the client computer should return the IP address from Google.

Running a traceroute www.google.com should show the IP address from the NAT router.