A multi-purpose switch / tap with an open-source firmware
Meet the Skunk, an adorable little 4-port Gigabit Ethernet switch and tap. Use it whenever you need a standard switch, or use it to sniff packets at gigabit speeds. Or write a custom firmware to do something else entirely.
Just plug in the included power adapter, and the Skunk functions as a standard gigabit switch.
Connect the included USB cable to control port mirroring and turn the Skunk into an active gigabit tap for easy packet sniffing. No fumbling with complex web interfaces and IP address configuration madness. The Skunk is transparent and a single command on the USB is enough to configure sniffing.
Instructions for use can be found in the Skunk User Guide.
The Skunk is shipped with a basic 3D-printed press-fit enclosure. This means you can easily remove the case and print your own, or even integrate the Skunk board directly into something else.
- Skunk (main board)
- Plastic case (green)
- 5V 1.0A power supply
- 0.3M USB cable
- Some stickers :)
Ethernet cables are not included!
Please note: some of the pictures may depict different case colors or designs. The one actually included with the Skunk is the translucent green case shown in the main product picture.
The next level in network sniffing
Thanks to its powerful switching core, sniffing on the Skunk is transparent and does not interfere with the normal switch operation, meaning the same port can be used for sniffing and network access. Sniff the network and ride it at the same time from a single port!
Any combination of RX / TX traffic from all ports can be simultaneously mirrored to the sniff port, which can itself be any of the 4 available ports. The only limitation is that there can only be one mirroring output port ("sniff port") at any time.
At the heart of the Skunk lies the Microchip KSZ9896, a powerful switch engine packed with advanced features including port mirroring, 802.1X NAC, VLAN support and more.
The Skunk also features an ATMEGA1284P microcontroller which allows for easy management through the on-board USB-UART interface.
Make it your own
The firmware included by default serves as an open-source reference for anyone looking to write their own, or even just a foundation that can be easily modified / extended. The official repository is available here: Skunk firmware repository.
Only the port mirroring ("sniffing") feature is implemented in the reference firmware, serving as an example - other management features such as VLAN or 802.1X are left open to custom implementation.
The firmware is built using the open-source Dooba SDK - if you are not familiar with it, the Discover Dooba tutorial is a good place to get started.
IMPORTANT NOTE: THIS IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED.
NO HELP OR SUPPORT WILL BE PROVIDED OTHER THAN THE SKUNK USER GUIDE.
IF YOU ARE PURCHASING THIS, IT IS ASSUMED YOU KNOW HOW TO USE IT AND WHAT YOU ARE DOING.
THAT BEING SAID, YOU ARE REQUIRED TO OBEY THE LAW AND ARE PROHIBITED FROM USING RINGTAIL PRODUCTS FOR ANYTHING OTHER THAN LEGITIMATE PURPOSES.
RINGTAIL WILL NOT BE HELD RESPONSIBLE FOR ANY DAMAGE CAUSED AS A RESULT OF USING OUR PRODUCTS.