On the router used at the vacation house, the disk size is very limited. To get SVT play and our Apple TV to think we’re still in Sweden, I needed OpenVPN. The default OpenWRT image I installed didn’t have enough room to fit the openvpn package. So I made an attempt to fix this using a custom build of OpenWrt Attitude Adjustment 12.09.
Instructions here are a summary of the work carried out, as layed out on OpenWRT’s wiki page for custom builds.
root@OpenWrt:/etc# cat banner
_______ ________ __
| |.-----.-----.-----.| | | |.----.| |_
| - || _ | -__| || | | || _|| _|
|_______|| __|_____|__|__||________||__| |____|
|__| W I R E L E S S F R E E D O M
-----------------------------------------------------
ATTITUDE ADJUSTMENT (12.09, r36088)
-----------------------------------------------------
* 1/4 oz Vodka Pour all ingredients into mixing
* 1/4 oz Gin tin with ice, strain into glass.
* 1/4 oz Amaretto
* 1/4 oz Triple sec
* 1/4 oz Peach schnapps
* 1/4 oz Sour mix
* 1 splash Cranberry juice
-----------------------------------------------------
root@OpenWrt:/etc# cat openwrt_*
DISTRIB_ID="OpenWrt"
DISTRIB_RELEASE="12.09"
DISTRIB_REVISION="r36088"
DISTRIB_CODENAME="attitude_adjustment"
DISTRIB_TARGET="ar71xx/generic"
DISTRIB_DESCRIPTION="OpenWrt Attitude Adjustment 12.09"
12.09
root@OpenWrt:/etc# cat /proc/cpuinfo
system type : Atheros AR9330 rev 1
machine : TP-LINK TL-WR741ND v4
processor : 0
cpu model : MIPS 24Kc V7.4
...
The LuCI UI however reported the model to be TP-Link TL-WR740N/ND v4. Now that we know what we’ve got, lets get the custom image builder. The sticker at the bottom of the device says: TL-WR740N Ver.4.26
For sake of fallback options, downloaded the stock firmware from TP-Link’s site.
Get list of currently installed packages:
root@OpenWrt:/etc# echo $(opkg list_installed | awk '{ print $1 }')
Packages I don’t need (USB and PPP):
kmod-ppp kmod-pppoe kmod-pppox kmod-usb-core kmod-usb-ohci kmod-usb2
ppp ppp-mod-pppoe
Saving current network config (and SSH key config):
mkdir -p files/etc/config
scp root@192.168.1.1:/etc/config/network files/etc/config/
scp root@192.168.1.1:/etc/config/wireless files/etc/config/
scp root@192.168.1.1:/etc/config/firewall files/etc/config/
...
And to build the thing
wget http://downloads.openwrt.org/attitude_adjustment/12.09/ar71xx/generic/OpenWrt-ImageBuilder-ar71xx_generic-for-linux-i486.tar.bz2
tar -xvjf OpenWrt-ImageBuilder-ar71xx_generic-for-linux-i486.tar.bz2
cd OpenWrt-ImageBuilder-ar71xx_generic-for-linux-i486
make image PROFILE=TLWR740 PACKAGES="... rather long list ..." FILES="../files/"
Get the sysupgrade.bin file and upload it in the LuCI admin UI.
To be continued …