Even though Cisco equipment is very capable, it tends to become End-of-Life before you can say “planned obsolescence”. Websites become bigger, bandwidths increase, and as a side effect of those “improvements”, routers, firewalls, and in this case, intrusion prevention systems get old quicker and quicker.
Apparently, this was also the case for the Cisco IDS-4215 Intrusion Detection Sensor that I was given a few months ago.
Continue reading “Revive a Cisco IDS into a capable OpenBSD computer!”
smartphones came to be, many common portable devices such as
netbooks, palmtops and pocket organizers became obsolete. Today I
will present to you one such device – a Tidalwave palmtop computer
A really quick post to help others that encountered the same problem as me. The iLO 100 remote management system on the HP ProLiant ML110 G6 server can’t be password reset with a jumper or a similarly simple measure. It involves a DOS boot disk and a certain ipmitool command that resets the username “admin” to password “admin”. To save time, I made a working bootable image using FreeDOS. Unzip and flash it to a USB drive, boot from the drive, and then exit to DOS prompt. From there, run:
The program should complete successfully and you should be able to log into the iLO with username admin and password admin.
Download the disk image here!
In the previous part, we set up DHCP, TFTP and RARP servers and successfully booted the OpenBSD ramdisk install kernel on old Soekris hardware over the network from a repurposed Cisco IDS. In the last part of this series, we will add NFS shares to the mix and install OpenBSD to them, making our PXE clients fully functional and then set up a minimal router and a caching DNS to provide our clients with working internet access.
Continue reading “Run an outdated cluster with diskless OpenBSD and cute little green boxes (part 3)”
In the first part, we became familiar with the hardware we’ll be working on and gathered the needed information. In this part, we focus on making PXE work up to the point we’re able to get to the boot loader and load a kernel.
Continue reading “Run an outdated cluster with diskless OpenBSD and cute little green boxes (part 2)”
Does anyone remember Soekris Engineering, the company that made network hardware and somehow also audiophile equipment? The first part of the company has unfortunately closed down in April 2017, while the latter still persists today. However, we won’t be focusing on high-fidelity audio in this guide, but rather on squeezing the last bits of life out of their old products.
Continue reading “Run an outdated cluster with diskless OpenBSD and cute little green boxes”
Recently, I’ve ran across a lot of TDA7231 chips in my workshop and figured out I’d use them for something. That something turned out to be a stereo 1.6W audio amplifier, which I named the Matchbox Screamer. Here’s the circuit diagram:
The circuit is based on the example circuit in the datasheet and is designed to operate voltage-independent. The voltage range is 1.8-15 V, with which also varies the output power. That means it can be powered from basically whatever you desire, from li-ion batteries, to USB, to 9V batteries.
I still have to etch the PCB for the thing and will post an update when I build and test it.