So Cal Free Net.org

M0n0wall is succesful in large part due to the vision of its designer. Manuel provided the following guidelines that a captive portal needs to meet for him to consider adding it to the core m0n0wall release (taken from Manuel's email):

• adds < 100 KB to the root filesystem


• copes with low-end embedded platforms (think about a 32 MB/100 MHz
  net4511),


• have to be put under the BSD license like the rest of m0n0wall


• will be subject to whatever changes Manuel finds appropriate


• all the config in one single place (config.xml)


• all admin via the http interface (no ftp of files)

Manual also asks:

Did you check that it fits in with the rest of m0n0wall
without requiring a complete overhaul thereof? I mean - you know that
ipfilter doesn't do layer 2 filtering, and that ipfw has got a kinda
"reserved" function for the traffic shaper, which must work no matter if the
captive portal is on or off. Same goes for other functions like VPN etc. of
course.