Centroid.EU Blog
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February 13th, 2012
I opened my OpenBSD 5.0 CD set today. I was going to give it away/trade it
away but noone was interested. 90 days on offer went past and so I opened
it today. I put the stickers on mars and saturn.
I think it looks stunningly good. Mars has a lot of goo over it from previous
OpenBSD 3.0 stickers that were on its casing that were removed for a bit, but
the goo didn't disappear. Just goes to show you going with OpenBSD is a one
way street :-).
0 comments
Information and its exchange
February 13th, 2012
What is information? It's data. It's written symbols or spoken words that
are encoded/recorded somehow. In the 80's when I was a child we had several
means of getting information. We could buy books. We could buy a vinyl record
or a cassette tape. Information intended for the masses was spread by radio
and television. Usually the radio stations were government run or were
independent private radio stations that were approved by government who listened
like owls for any "message" that did not fit a strict guideline. If someone
disregarded these guidelines (like saying F.U.C.K. on-air) would get penalized
or even turned off completely.
So what if you wanted a more relaxed medium to listen to? Well what we did
in the early 90's was share cassette tapes with
spoken word over music (hip-hop). The drawback was that you had to make a
master copy and copy from it because every time you copied the analog signal
on the tape would get ever so distorted. Also with more usage the tape would
get worn. It was fairly frustrating. When I then attended College for
computing engineering technology I was told that digital is a cheap way of
exchanging information. The digital circuitry didn't care if the voltage was
0.5 volts off what it really was, which meant you could now share the SAME
data over a medium that would have been impossible if it was over analog.
Digital communication meant that every time you did a copy of a copy of a
copy the data would not degrade in quality.
So then eventually the Internet became popular and spread. First it was
slow and the information exchange was probably in 8 bit ascii (e-mail, usenet)
which was fine for a 28.8 Kbps analog modem. Then came the DSL revolution.
ISP's who established themselves from BBS's were bought out or were forced
out of business as the Telco companies once again dominated in the Information
exchange. But how that went down is irrelevant, what is more important is
that Information exchanged could now be sounds as in music and it could be
spread en-masse. Formats such as podcasts came. Podcasts are large MP3
files that are stored on a server and can be downloaded via a server or a
bittorrent network for people to listen to a message.
So now we have a problem. Someones information is copyrighted, this means
that they wish to make money off the message. In the 80's this was easy
they'd get a distributor who printed records and people bought this in the
store and took it home. They did not worry about piracy because if people
wanted to spread the information the message would be distorted after so
many copies. Today in the 2010's the message can be mass-spread with no
quality degragation. The powers that used to make a good buck off the
80's method are now out of business or on the verge of. At the same time
we've never had a better way of spreading information on a personal level
than now. I can send a song to all my friends at fair quality. We've
been liberated by the Internet. And as a closing statement any attempt to
take quality sound reproduction from us is sheer censorship. The thought
has already been planted that we can do this, we're not talking about what
if's anymore.
We're not out to do harm, and we know that this is just a step between
now and then. What's next is anyones guess but the Internet keeps changing
us. We learn, and the Internet is the teacher. We are transitioning. We
are as curious what's next as the next one. Some people fear change because
it uproots their previous power structure. But let me ask you in all honesty
is it not fair to give everyone the same outlet as an elite bunch once had?
This is what (r)evolution is about and we are still evolving. One more
observance is that we're becoming more seclusive in our own homes due to the
Internet. This takes away some of our unity, that's the drawback. We don't
need laws like ACTA to draw us further back.
0 comments
Change is in the air
February 2nd, 2012
I've done some changes and I'm planning to do more changes. What I've done is
I increased my BOINC load from 1 core (25%) to 2 cores (50%). It will run
like this until May.
Why? What's in May?
Well, that is when OpenBSD 5.1
comes out and I've decided I'm going to make OpenBSD 5.1 my host operating
system. No more vmware, it won't run on it. Also it may mean no more BOINC
so that's why I'm doubling the load now to leave them with something. Also
means no more windows 7 vm, and the other vm's that run FreeBSD and NetBSD
I'll have to switch over to QEMU. What I'll do is get a new backup harddrive
and start converting vmware containers to a format that I can play it back
on QEMU. Much of what prompted me to design this thought is that youtube now
works with an OpenBSD browser. This makes OpenBSD ready for the desktop for
me. And it's not the first time I ran OpenBSD as a desktop, it's just that
I had a breather.
0 comments
Wildcarddnsd fixed on big-endian machines?
January 28th, 2012
Ever since I resurrected my G4 Cube and put OpenBSD on it I was dying to
know if wildcarddnsd works on this platform. I copied uranus's configs
to it (it's called mars) and ran a few queries. It was then a surprise
a few weeks later that I tried an AXFR and it came back as a hexdump in
dig. Not good. With gdb then I finally found out what caused the mangled
packet, the nameserver and responsible person fields were of length zero,
and were skipped in the SOA answer. I traced this to an integer overflow
right at program start at the config file parser. Well I fixed this now
in HEAD yesterday and in the upcoming release for BETA7 it will be working
on big endian machines.
I also tried compiling wildcarddnsd on OpenBSD/amd64 5.1-beta and got a
compiler warning. A nice developer helped me out and a second pointed to
another
possible problem. So I have the fix for silencing this compiler warning
but I haven't committed it yet. I want to play with this a little first
before I do so I know that it doesn't cause any problems.
0 comments
My dream Smartphone (Computer)
January 27th, 2012
My dream smartphone would be small like an iphone. It would have USB ports
for keyboard and mouse and perhaps a VGA port for external monitor. It
would be running OpenBSD without locking or restrictions. What's really
important to me is that I can program the OS on this phone. The phone
functions can be proprietary without source code but they must be installed
in a way that it allows the rest of the system to function with it. Perhaps
an asterisk server built-in so that it can do programmable voice mail or
something. There wouldn't be a harddrive in the phone but rather an SSD.
What's really important to me is that I can develop applications on the
phone for the phone, and not have to buy a proprietary laptop to use some
application which is the only one that can do so. It may have a GPS and/or
Galileo/Glonass/whatever geopositioning chip in it. But this should be
readable by an open driver on OpenBSD and through an ioctl into userland or
something. I want to make use of the Geolocation too. It should have
Wifi and bluetooth and if I want to allow tethering I should be able to
program it in. I should be able to compile the kernel on this smartphone
and run that instead. Really. I really want this to be MY phone not
THEIR phone that I am allowed to use. Currently I have no cell phone at all
because what I just described doesn't exist. Hmm how much would I pay for
what I just described? Perhaps 400 euros at max.
0 comments
Removed web mirror on uranus.centroid.eu
January 18th, 2012
You may not have known it but uranus.centroid.eu was serving this blog for
well over a year. I have now killed the rsync job and erased the mirror.
Uranus will do other tasks in the future, stuff I don't want to go into
just yet. Here is an mrtg yearly graph that I was hosting on uranus that
doesn't run anymore.
As you can see uranus did quite a bit of traffic every month. (about 15GB
per month on average). If you used to go to uranus.centroid.eu to get
whatever you can still get it on ipv4.goldflipper.net for the time being.
0 comments
FreeBSD 9.0 Released and PC-BSD 9.0 Released
January 15th, 2012
The wait is finally over! FreeBSD released its version 9.0 a few days ago and
dedicated it to Dennis Ritchie. Here is the 9.0 Release announcement.
Also PC-BSD (which is forked from FreeBSD) released it's 9.0 version.
Here is the
release pages from its blog.
0 comments
2.97 euros for Jamaica (iTunes)
January 14th, 2012
Today I bought 5 songs off iTunes. 3 songs hail from Jamaica with the
artists Chuck Fender, Movado and Fantan Mojah who I have heard on Youtube
long enough to warrant putting some money in their pocketses. The other
two songs are from Stratford, Ontario artist Nukky Grissom who was featured
on SVPRadio last week. Good stuff. I lived in Stratford for 7 years so
I know what he talks about in his songs (especially Small Town which was one
that I bought). I can relate. I'm overall happy with the purchase.
0 comments
Setting up iked on OpenBSD (my story)
January 9th, 2012
I have two hosts. One is a vmware workstation vm called dione. The other is
an OpenBSD/macppc G4 Cube called mars. Both are seperated by a router called
uranus. In ascii it looks a little like this:
+---------+ +---------+ +---------+
| dione }----------------{ uranus }---------------{ mars |
+---------+ +---------+ +---------+
2001:a60:f074::30 X 2001:a60:f074:5::2
I want to encrypt communication with IPsec between these two hosts. Here
is what my config (/etc/iked.conf) looks like on dione:
dione# grep -v ^# iked.conf
ikev2 active esp from 2001:a60:f074::30 to 2001:a60:f074:5::2 srcid "2001:a60:f0
74::30" dstid "2001:a60:f074:5::2" psk "swearword!"
Here is what my config (/etc/iked.conf) looks like on mars:
# grep -v ^# /etc/iked.conf
ikev2 active esp from 2001:a60:f074:5::2 to 2001:a60:f074::30 srcid "2001:a60:f0
74:5::2" dstid "2001:a60:f074::30" psk "swearword!"
I also set up the following commands on dione in reference to the ikectl
manual page:
dione# ikectl ca vpn create
dione# ikectl ca vpn certificate 2001:a60:f074::30 create
dione# ikectl ca vpn certificate 2001:a60:f074:5::2 create
dione# ikectl ca vpn install
dione# ikectl ca vpn certificate 2001:a60:f074::30 install
dione# ikectl ca vpn certificate 2001:a60:f074:5::2 export
dione# scp 2001_a60_f074_5__2.tgz mars:.
mars# tar -C /etc/iked -xzpf 2001_a60_f074_5__2.tgz
Then I started /sbin/iked on both machines and typed:
dione# ipsecctl -sall
FLOWS:
flow esp in from 2001:a60:f074:5::2 to 2001:a60:f074::30 peer 2001:a60:f074:5::2
srcid IPV6/2001:a60:f074::30 dstid IPV6/2001:a60:f074:5::2 type use
flow esp out from 2001:a60:f074::30 to 2001:a60:f074:5::2 peer 2001:a60:f074:5::
2 srcid IPV6/2001:a60:f074::30 dstid IPV6/2001:a60:f074:5::2 type require
SAD:
esp tunnel from 2001:a60:f074:5::2 to 2001:a60:f074::30 spi 0x1ee7655a auth hmac
-sha2-256 enc aes-256
esp tunnel from 2001:a60:f074::30 to 2001:a60:f074:5::2 spi 0xa0f22d34 auth hmac
-sha2-256 enc aes-256
Also tcpdumping shows that the traffic is encrypted:
mars# tcpdump -v -n -i gem0 -p -X ip6 and not port 22 and not port 9999
tcpdump: listening on gem0, link-type EN10MB
22:25:09.875931 esp 2001:a60:f074:5::2 > 2001:a60:f074::30 spi 0x1ee7655a seq 24
7 len 200 [class 0x10] (len 200, hlim 64)
0000: 6100 0000 00c8 3240 2001 0a60 f074 0005 a....È2@ ..`ðt..
0010: 0000 0000 0000 0002 2001 0a60 f074 0000 ........ ..`ðt..
0020: 0000 0000 0000 0030 1ee7 655a 0000 00f7 .......0.çeZ...÷
0030: 9de0 df93 049b bddc 5c94 936c 7352 d89f .àß...½Ü\..lsRØ.
0040: 982a 9497 c2a7 3117 930b 853b a69d 89ef .*..§1....;¦..ï
0050: 94a0 a7b8 9bce fa26 339b 1845 ad7f 8637 . §¸.Îú&3..E..7
0060: 27c0 f679 6eb9 'Àöyn¹
22:25:09.876728 esp 2001:a60:f074::30 > 2001:a60:f074:5::2 spi 0xa0f22d34 seq 28
1 len 120 [class 0x10] (len 120, hlim 62)
0000: 6100 0000 0078 323e 2001 0a60 f074 0000 a....x2> ..`ðt..
0010: 0000 0000 0000 0030 2001 0a60 f074 0005 .......0 ..`ðt..
0020: 0000 0000 0000 0002 a0f2 2d34 0000 0119 ........ ò-4....
0030: 3ca6 1eb5 81c0 f64a b5a8 b2c3 b933 c896 <¦.µ.ÀöJµ¨²Ã¹3È.
0040: fa73 17cd a054 5ff9 151e b781 3b50 5972 ús.Í T_ù..·.;PYr
0050: 1d7d 2709 7dc8 c36c 8dcc e42b 0c86 e186 .}'.}ÈÃl.Ìä+..á.
0060: 927b a804 50bd .{¨.P½
If that procedure doesn't work for you I also copied the .pub key of each
respective hosts and stuck them into /etc/iked/pubkeys/ but I doubt that
made a diff.
Have a lot of fun (I only wasted 4 hours on this).
Another thing worth mentioning is that the certificates created are
self-signed. Iked as of 20120109 does not support self signed certificates
so the PSK method seems to be the only way.
Suggestions on how to better this always welcome.
0 comments
New Comment System
January 6th, 2012
I've put up a new commenting system and fixed the io.solarscale.de instance
for commenting. Hopefully this is useful.
0 comments
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