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latent.sh

latent.sh is a autostart script written in bash for openvpn, rtorrent and sysvinit/systemd. It ables you to with little hassle create a separate networked namespace (logical copy of the network stack) and connect it over openvpn isolating it from the rest of the system. It then launches rtorrent into a byobu session and binds it (-b ) to the ip address.

This is useful if you want to run certain processes like rtorrent in an isolated enviroment connected to the internet via a vpn connection.

This project is under development still, might change/break

How it works

The gist of it is that a netns is created upon runtime and iptables are configured accordingly via virtual eth's or (veths for short) making the netns able to access the network. Then a openvpn connection is established and the rtorrent instance is binded to the ip address acquired by openvpn.

Visualization

        +------+       +-------+       +-------+       +-------+      +---------+      +----------+
        | eth0 |-------| veth0 |-------| veth1 |-------| netns |------| openvpn |------| rtorrent |
        +------+       +-------+       +-------+       +-------+      +---------+      +----------+

Requirements

The script depends on these packages.

  • byobu
  • openvpn
  • rtorrent
  • iptables

.. and obviously a vpn provider you either run yourself or trust enough with your illicit traffic ;-)

Installation

I didn't think this thru.

1. Clone the repo

$ git clone https://github.com/skrupler/latent.git .sh

2. Adjust the settings.

$ vim .sh/latent.sh
PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
USER="HACKER1"
RTORRENT=/usr/bin/rtorrent
BYOBU=/usr/bin/byobu
BYOBU_NAME=secure
BYOBU_TITLE=rtorrent
IP=/sbin/ip
PIDFILE=/var/run/rtorrent.pid
SOCKET=/tmp/rpc.socket
IFACE="eth0"
NETNS="hidden"
VETH0="veth0"
VETH1="veth1"
DNS="nameserver 91.239.100.100"
OPVN=/etc/openvpn/openvpn.ovpn
SOCKET_NAME=rtmux

Tip

Do note that if you have a vpn provider with login credentials you can specify in your .ovpn configuration file a authentication directive auth-user-pass /etc/openvpn/auth which takes two lines, username and password on 2ndline.

3. Choose what boot manager you run and continue from there.

Boot managers

It works with a varity of boot managers.

Upstart/SysVinit

Put the latent.sh in /etc/init.d/latent.sh and activate it.

Register it with rc.d:

# update-rc.d latent.sh defaults 99

Make it executable:

# chmod 755 /etc/init.d/latent.sh
Usage:
# service latent.sh (start|stop|restart)

Systemd

Create a unit file in /etc/systemd/system/latent.service.

[Unit]
Description=latent.sh
After=network.target

[Service]
Type=forking
KillMode=none
ExecStart=/home/username/sh/latent.sh start
ExecStop=/home/username/sh/latent.sh stop
WorkingDirectory=%h
Restart=on-failure

[Install]
WantedBy=default.target
Usage:
systemctl enable latent.service
systemctl start|stop|restart latent.service