Centroid.EU Blog

(this blog is mostly encrypted - adults only)

Previous Page

Freifunk, 1043's seem to be the next 841's

January 20th, 2018

I took a look at Freifunk Stuttgart today and noticed they recommend 1043 routers because the 841's are not supported anymore. The 1043's are about twice the cost of a 841 but coming down. They dropped the USB port in newer versions so that would prevent playing with chaoskeys on this hardware. But there is another model the C7 Archer that has dual 5GHz/2.4GHz modes. Those are almost twice as much as a 1043, but would cut hardware if one is going into the 5GHz spectrum. That's something that interests me a lot. We'll see how it works out.


Mid-January Rainbow

January 16th, 2018

I sighted this rainbow out of my east side windows.

I made a few more pictures about a minute later it started to sleet/snow.


How to build riscv-qemu on OpenBSD

January 10th, 2018

As you know I lately became interested in RISC-V. Here is the webpage on how to build riscv-qemu so that you can simulate the RISC-V processor:

Also I have a modification from Method 1a that worked for me on OpenBSD, it's probably best if you install the regular qemu beforehand via pkg_add or via the ports system so that everything is in place as on my computer:
$ git clone https://github.com/riscv/riscv-qemu
$ cd riscv-qemu
$ git submodule update --init dtc
$ git submodule update --init pixman
$ ./configure --target-list=riscv64-softmmu,riscv32-softmmu \
	--extra-cflags=-I/usr/X11R6/include \
	--extra-ldflags=-Wl,-z,wxneeded \
$ gmake
# [gmake install]
I install in /usr/local/riscv so that the ports/pkg system does not get polluted or clobbered. I then ran the example Linux busybox image provided on the riscv page:
# uname -a
Linux ucbvax 4.6.2-00041-g030e817-dirty #2 Mon Dec 19 08:48:07 PST 2016 riscv64 GNU/Linux
I think it worked. Also to make sure that this works you must have a wxallowed filesystem where the binaries are in. Otherwise you'll see it say this in dmesg:
qemu-system-risc(23987): mprotect W^X violation
Enjoy! I know I will.


Starting to buy books for 2018

January 10th, 2018

I have ordered:

  • The RISC-V Reader: An Open Architecture Atlas - Patterson & Waterman
  • Computer Organization and Design: The Hardware Software Interface: RISC-V Edition - Patterson & Hennessy
The latter book I have already but it's from 1999, so I'm curious how they changed it. It also is a MIPS version which I never used. I'm very curious on the RISC-V architecture and hoping that eventually there will be an OpenBSD port to this (It exists in NetBSD and FreeBSD so porting efforts have some help by example).


OpenBSD was not notified of Meltdown

January 6th, 2018

This is where OpenBSD is currently:

First fix will be done for amd64, then i386 and last ARM.


Intel, Meltdown and Insider Trading?

January 4th, 2018

If you read the Acknowledgements of the meltdown paper found at the meltdown and spectre website, it is said that Jann Horn informed Intel of the bug in June of 2017. In late November of 2017 the CEO of Intel sold all his stocks, which to me is highly suspect of insider trading... (Intel Inside?). The story about the selling of the stocks (worth 11 million $) is here. I don't know if this is good on Intels part. I'm very mad that we've been ripped off since 1995! So my 486 DX/2 was likely already vulnerable.


Delphinusdnsd 1.2.1 Released

January 1st, 2018

This is a small bugfix to allow delphinusdnsd to start up after signing the zone with a 4096 bit key. I haven't tried any higher, I have a few unsigned zones still and will be able to use them for testing....eventually. Didn't think I'd have a minor release this quickly after the 1.2.0 release. The download is here.


Digitally signed two domains

January 1st, 2018

I have signed two domains, freifunk-schweinfurt.de and delphinusdns.org for DNSSEC. The signing of the 4096 bit keylength RSA-512 went eventless. However the delphinusdnsd server did not want to load those zones due to the increased length of the signed text. I finally found the bug and will be making a correction to delphinusdnsd later. I will probably release 1.2.1 in the next few days.


10 USD/year per domain on average

January 1st, 2018

This morning I renewed and paid for 8 domains of mine, around 160 USD. I have enabled privacy options as well. Interesting is that the lions share went into the .net and .org domains (around 90 USD for those two). Somehow it seems the .de domains that I have are really cheap. I renewed for two years. Next is DNSSEC'ing more domains and looking at letsencrypt for centroid.eu.


Happy New Year 2018

December 31st, 2017

In Kiribati it was new years already. In Australia as well. We have 7 hours to go. Soon soon. I want to wish everyone a happy new years 2018.


Next Page


RSS Feed

Click here for RSS

On this day in

Other links

Have feedback?

By clicking on the header of an article you will be served a cookie. If you do not agree to this do not click on the header. Thanks!

Using a text-based webbrowser?

... such as lynx? Welcome back it's working again for the time being.

Older Blog Entries

Powered by BCHS