WiFiDog was an open source embeddable captive portal solution used to build wireless hotspots.
It was written by the technical team of Île Sans Fil and is included in the software package repository[2] of OpenWrt.
Linux Journal reports that a working gateway install can be packaged in less than 15kB on an i386 platform.
[3] The WiFiDog authentication server is a PHP and PostgreSQL or MySQL server based solution written to authenticate clients in a captive portal environment.
WiFiDog Auth provides portal specific content management, allows users to create wireless internet access accounts using email access, provides gateway uptime statistics and connection specific and user log statistics.