Intro My first visit to an exhibition of old computers. It was held on November 30th and December 1st in Zürich in the “Rote Fabrik”. Given my collection of not-so-old computers I wanted to see a collection of really old computers. PDP-11 The first thing which catched my attention was a PDP-11 emulator with frontend also simulating a Tektronix 4010 graphical terminal. It's running on a Raspberry-PI fully emulating a PDP-11 running BSD 2.
History It was a beautiful day. My mailserver on the Raspberry Pi B was running without any issues for some time now. In the evening of March 12th I got a nice email from my external DNS provider: The BuddyNS janitor writing. A safety notification on your BuddyNS account: Your zones reached 60% of your account's traffic quota. Details: * Total traffic produced this month: 181 Thousand queries. * Current traffic quota: 0.
History I got an old Mac from a collegue at work. Apple decided not to support those devices anymore, anyway, they date back to 2006. I think, it's a pitty, because this Mac has a solid case, a pretty fast 64-bit processor (sorry Archlinux32, no test machine for you) and a graphic chip which is not melting away like in later models (I don't name brand names here).. Here the specifications:
So.. I removed my personal git repos from GitHub and I'm using now my local repository. The reasons should be obvious: Find my software on http://git.andreasbaumann.cc/cgit/. If you want to collaborate or supply a patch, you can contact me via email.
Intro I saw a video on LGR and thought, this is a nice system to run my own operating system on. The Unisys CWD-4002 came as a i486 DX/2, 66 MHz, 16 MB RAM and a 512 MB hard drive. sweet. And fits under my monitor, together with a Aten KVM switch and an Alix 1.E minicomputer: Ok, I increased the memory to a whooping 32 MB. And I bought an IDE-to-SD-adapter as the 512 MB hard disk is not enough for a basic installation of Archlinux32 and I don't know how long the hard disk would work anyway:
History It started with a question from a collegue at work: “Why are all operating systems nowadays written in C?". I wanted to dig deeper… Resources Some years ago it would have been extremely tedious to write an operating system on your own. Don't get me wrong, it's still a tremendous task, and I don't think anybody should do it for the sake of proving the world, he is able to build the best operating system ever.
History Since some time our company Eurospider was using home-grown firewalls based on OpenBSD. Our administrator at this time (Mihai Barbos, https://github.com/mbarbos) decided to use Portwell NAR-2054 hardware with 3 up to 5 ethernet ports and run a customized OpenBSD on it. Now the company firewall is a Soekris net6501 as the Portwell firewalls started to become a little bit rusty. There is still one Portwell left in use for a control network serving access to remote management consoles of our servers.
Intro I wanted to add a search function to my web page. As the website is built with Hugo as a set of static HTML pages onto a read-only web server, standard approaches didn't work like a LIKE-query in Mysql as many CMS are implementing search. The big logo gives it away, it's done with the strusWebService from the Strus project. The basic idea is that the author of the web pages can build a search index locally with the markdown version of his content and then push it to a web service dedicated to search only.
Intro Into the category of “What can I possibly do useful with a Raspberry PI?” falls the idea of origanizing a backup server using the Bacula backup software. Details I use an old USB disk and a USB hub as external storage for the Bacula volume data and for the catalog (stored in PostgreSQL). For full-filling the off-site requirement the jobs are copied with a ‘Migration Job’ to an external FTP server.
Some years ago I decided to write my personal web page as a bunch of static HTML pages using only server-side includes to cope with the repetitive elements like footer, header, menus. When I installed a Wordpress just for the blog I intended to start, I thought: why can't this be done statically too? In fact, it can be done: the following web pages show an explosion of tools for static HTML site generation:
In August 2009 I decided it was time to replace my old Pentium II serving 5 old SUN storage disks (the white boxes, enormously noisy, for those who remember) with a modern NAS system. I bought a QNAP TS-439 Pro. The integrated firmware (aka customized Linux) gave me the creeps from a software design point of view, but it did the job. Almost exactly a year later there was a fatal event and my software RAID (RAID 5) decided not to assemble anymore.
Found a really nice new router appliance based on OpenBSD 6.0, http://securityrouter.org. I’m still missing some features like a split-horizon DNS, so I will not abandon the script-based project http://git.andreasbaumann.cc/cgit/OpenBSD-firewall just for now.
This is a personal blog. I intend to post on technologies and ideas currently on my mind. Take everything I write with a grain of salt.. ;-)