In this article we describe briefly OpenWrt
As stated in the above link OpenWrt is a linux distribution for wireless devices. It is available for different routers as listed in the following page
The firmware is an open source one, it is modular with the possibility to use various packages.
At the following link we find the documentation about packages and the opkg command
After the OpenWrt firmware installation we can login using the ssh protocol in a unix shell command and check the installed packages, installable package and so on.
shows the available packages for the device.
This command works if the list of the repositories is available in the opkg.conf file,
but the same operation is available trhrough the web interface
First we log on to the router with a browserWe access to the Software sectionWe press the Update lists buttonThe list is loadedNow we search for a package, for example vsftpdAfter the search we can proceed to the installationWe can find it among the installed packagesIn future articles we will describe how to build the image for your router along with an additional package