Simplenet

Simple network creation for busy pentesters/sysamdins.

Features

• Bond interfaces and creates a switch between them (to capture traffic without a tap or a hub)
• Connect to the virtual switch, get an IP (static or dhcp)
• Nat the network created by the virtual switch
• Assign IP addresses on the subnet with DHCP
• Spins up a radius server Not yet

Requirements

• python3
• docopts (python library)
• bridge-utils
• jinja2
• docker (for dhcp and radius)

Install

pip install -r requirements.txt

Examples

Network interfaces can be listed by using ip l or ip a.

Intercept traffic on a link

I have two network interfaces : eth0 and eth1, I want to connect them and capture the traffic :

./simplenet switch --name eavedrop eth0 eth1

Now a tcpdump -i eavedrop will almost look like the output of a network tap.

Chain laptops

I have two laptops but only one RJ45 port to the LAN. One of the laptops have two interfaces : eth0 and eth1. My IP on the lan is 192.168.2.100 and the subnet is 192.168.0.0/16.

./simplenet.py switch --name switch --with-ip --ip 192.168.2.1 --subnet 192.168.0.0/16 eth0 eth1

Create a NATed LAN

The interface eth2 is connected to the WAN. Make sure you have an IP and a default route.

./simplenet.py switch --name switch --with-ip --ip 192.168.2.1 --subnet 192.168.0.0/16 eth0 eth1
./simplenet.py nat switch eth2

Setup a DHCP server

./simplenet.py switch --name hello --with-ip --ip 10.0.1.1 --subnet 10.0.1.0/24 enp0s31f6
./simplenet.py dhcp hello --subnet 10.0.1.0/24 --gateway 10.0.1.1 --resolvers 8.8.8.8