Episode75

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Wireless Guest Network: Part I

Equipment Used:

  • 2 WRT54GLs
  • 2 LINKSYS POE Adapter WAPPOE12 12V
  • OpenWrt "Whiterussian" 0.9
  • Step 1 - Unbox and flash the routers. For the WRT54GL, you must use the web interface to put the initial OpenWrt image on them. (Question, why does Linksys not enable boot_wait by default?). Also, do not use the PoE adapters when flashing!
  • Step 2 - Change the IP address of the routers, enable boot_wait, and set the hostname:

nvram set lan_ipaddr="10.10.10.5" nvram set boot_wait="on" nvram set wan_hostname="myap1" nvram set wan_proto="none"

  • Step 3 - Create a separate VLAN or physical network, preferably with a separate Internet connection. Put that APs on that subnet.
  • Step 4 - Harden and perfomance tune OpenWrt - Remove the packages that are not required:

ipkg update

ipkg remove ppp ppp-mod-ppoe webif haserl kmod-ppp kmod-pppoe

ipkg upgrade

Disable services not required:

cd /etc/init.d mv S50httpd disabled_S50httpd mv S50telnet disabled_S50telnet

  • Step 5 - Enable DHCP on each of the access points:

cat > /etc/init.d/S60dnsmasq

  1. ! /bin/ash

/usr/sbin/dnsmasq &

<CRTL-D>

Now, remove the DHCP configuration from the /etc/dnsmasq.conf, and replace it with: