Linux on a Mikrotik 532a , Part 5 Final – OpenWRT and Custom Scripts

Follow on from: http://www.adampalmer.me/iodigitalsec/linux-on-a-mikrotik-532a-part-4-customization-debian-scripts-shaping-firewall-nat-picolcd/ I’ve used OpenWrt previously to this project to build some firmwards for the Linksys Router WRT54 range. OpenWrt is an incredibly powerful and small Linux distro. Although debian is probably better suited to the reasonably powerful hardware, I wanted to give OpenWrt a go anyway. Unless you’re running a MIPS 4Kc processor on your host which I’m guessing you’re not, you’ll either need to cross compile your binaries, or just compile them natively on the device itself. Compiling on the device works fine as long as you have the relevant packages, however if I was going to build a 2.6 kernel, I’d rather do it on an x86 quad core intel host, rather than waiting a week for the device to do it. I also wanted to minimize the writes on the CF card. OpenWrt comes with a nice buildroot environment which you can read about and download from www.openwrt.org using Subversion. Here http://downloads.openwrt.org/kamikaze/docs/openwrt.html#x1-310002 is a great HOWTO on getting the build root environment set up on your x86 host. Also, see: http://wiki.mikrotik.com/wiki/RB500_Linux_SDK – this is a very complete HOWTO, which is why I’ve not covered most of the installation process and just detailed customizations. You’ll need to select the RB5xx target for the kernel. Also, run: make kernel_config In your build root top directory, and add USB support (as my one is modded for USB which is not RB5xx default. While you’re there, browse to the networking options and make sure you have everything you want, specifically the schedulers for traffic shaping. […]

Linux on a Mikrotik 532a, Part 4 – Customization, Debian Scripts, Shaping, Firewall, NAT, picoLCD

Follow On From: 05 Oct 08 APNIC Box – Linux on a Mikrotik 532a, Part 3 – Installing Debian, Prebuilt Disk Image Following on from the previous article, I’ve written some scripts which you’ll find in the /root/scripts/ directory of the prebuilt image. I’ve attached and commented them here, as they could also be useful elsewhere. bridge.sh #For setting up a simple bridge […]

APNIC Box – Linux on a Mikrotik 532a, Part 3 – Installing Debian, Prebuilt Disk Image

Follow on from 01 Oct 08 APNIC Box – Linux on a Mikrotik 532a, Part 2 The device runs a 2.4.30 kernel on a debian woody (mipsel) environment. If anyone can contribute anything for 2.6.x and debian etch, that would be great. Installation instructions: […]

APNIC Box – Linux on a Mikrotik 532a, Part 2 – Hardware Modifications

Follow on from 01 Oct 08 APNIC Box – Linux on a Mikrotik 532a, Part 1 Custom Hardware Modifications Here’s a labelled image of the inside of the device. You can also look towards the bottom left of the image for my simple solder modifications. Enlarge the image to see the labels. APNIC Box Image 2 1. External 2.4GHz/5GHz antenna. Same on opposite side. 2. 5V solder point 3. 5V connector for miniPCI USB card 4. 2x 2USB Headers. 1 Header in use providing 2x USB interfaces, one to regular host connector for mass storage or other usb connection. Other port for picoLCD on top 5. 512MB CF card 6. miniPCI USB controller On the underside of the board there is a single miniPCI socket which houses an Atheros 5212 802.11a/b/g miniPCI card. It has two antenna outputs which run under the board and two the two external antennae. I haven’t taken a picture of this but if anyone really wants to see it, I will power down the device, get a picture of it and post it here. […]

APNIC Box – Linux on a Mikrotik 532a, Part 1 – The Device

I put this device together for fun sometime around the start of 2007. The ideas that spawned this was using OpenWRT on a Linksys WRT54G access point. A surprisingly powerful and full linux distro with all kinds of advanced capabilities running on a Linksys wireless router which I’d previously thought to be a reasonably dumb device with computing power more comparable to a calculator than a PC. The project opened my eyes to embedded devices, and I wondered what device base I should start with. To cut a long story short and for reasons that I can’t even remember anymore I came across the Mikrotik Routerboard 532A and decided that I should start with that. Conception APNIC Box Image 1 Here’s a picture of the device from the outside with some labels, view the full image to see them. 1. Status LEDs. Blue at the bottom left shows it’s on, orange at the top right shows that there’s wifi activity. 2. Ethernet (eth0) 3. Standard Serial Console (57600, 8 N 1) 4. Ethernet (eth1) 5. Ethernet (eth2) […]