Multiple Wireless LAN in a single Wireless Router using dd-wrt
Channel: Rio Maulana
Date: 2014-03-18

This video is our class project in IST 648 - Enterprise Wireless Network Management in School of Information Studies, Syracuse University.
In this video we show how to create a multiple SSID and network in a single wireless router using dd-wrt.

We include iptables commands that we cannot explain on the video due to duration limit.

This commad is needed to manually activate NAT so that router can forward all the traffic from all network to the internet due to bug in dd-wrt build 1700 or later, 

iptables -t nat -I POSTROUTING -o `get_wanface` -j SNAT --to `nvram get wan_ipaddr`

This command will allow brx (replace x with associated bridge number) to access WAN network, thus its packet that going to the internet can be forwarded by NAT in WAN.

iptables -I FORWARD -i brx -m state --state NEW -j ACCEPT
iptables -I FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu

This command will prevent connection from brx to bry (replace x and y with associated bridge number). This command only block connection in one direction, not both directions.
iptables -I FORWARD -i brx -o bry -m state --state NEW -j DROP

Reference
http://www.dd-wrt.com/wiki/index.php/Installation
http://www.dd-wrt.com/wiki/index.php/Multiple_WLANs

Background Music
Mille Girafons by Löhstana David - http://www.jamendo.com/fr/track/852123/mille-girafons
High Hopes by TheBlackParrot - http://www.jamendo.com/en/track/1099699/high-hopes

Video taken with Google Nexus 5, iPhone 5 and Camtasia
Sound recording and editing using Blue Yeti + Adobe Audition
Video editing using Sony Vegas