Centroid.EU Blog

(this blog is mostly encrypted - adults only)

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traceroute6 clock.centroid.eu

February 18th, 2011

When I'm awake and my computer is on you can traceroute6 clock.centroid.eu and it'll give you the time of day in GMT. Like so:

13  cl-154.muc-02.de.sixxs.net (2001:a60:f000:99::2)  122.742 ms  121.5[36/1981$
3.863 ms
14  cordelia.centroid.eu (2001:a60:f074:4::2)  127.305 ms  128.850 ms  130.404 m
15  xxx.hello.xxx.centroid.eu (2001:a60:f074:ff::1)  123.780 ms  123.610 ms  123
.301 ms
16  xxx.why.xxx.centroid.eu (2001:a60:f074:ff::2)  124.455 ms  126.730 ms  124.9
04 ms
17  xxx.are.xxx.centroid.eu (2001:a60:f074:ff::3)  131.776 ms  128.739 ms  134.4
05 ms
18  xxx.you.xxx.centroid.eu (2001:a60:f074:ff::4)  125.209 ms  133.453 ms  128.6
66 ms
19  xxx.tracerouting6.xxx.centroid.eu (2001:a60:f074:ff::5)  137.000 ms  133.315
 ms  143.594 ms
20  the-time-is-15-41-02-in-gmt.clock.centroid.eu (2001:a60:f074:fe::dc8e)  138.
899 ms  141.519 ms  145.045 ms
21  dione.centroid.eu (2001:a60:f074::30)  123.835 ms  125.093 ms  123.141 ms
The code for this was actually pretty simple, it only required to put in 86400 reverse dns entries into my name server which bloated it by about 60 megabytes, but it's worth it I think. It does not work for traceroutes that work with ICMP nor for traceroutes that require forward and reverse to match.


Reading code

February 12th, 2011

Tonight I found myself reading code. The resolver code in OpenBSD to be exact. I do this when I'm looking for something... and by golly I think I've found it...
  if (++loops < 42) /*doug adams*/

res_send.c lines 799-820/853 byte 21458/22096 97%  (press RETURN)

Heute abend habe ich Code gelesen. Die resolver library in OpenBSD um es genauer auszudruecken. Wenn ich sowas tue, suche ich was... und ich glaube ich habe es gefunden...man muss "per anhalter durch die galaxies" gelesen haben.


Random Hackepedia

February 11th, 2011

The RH for this week is Ddos.


Changed mailserver

February 6th, 2011

I've switched the MX records for all my domains to uranus.centroid.eu. That's my newly upgraded DSL. The old mail server proteus has almost fulfilled its mission and after four years I'm finally giving it retirement. Proteus will be switched off completely on March 13th and I've already gone through it and deleted enough signs of its use last night. Uranus and goldflipper.net will be my mainstay for the next two years and who knows what will come along by then.

Ich habe die MX records fuer alle meine Domains zu uranus.centroid.eu gesetzt. Das ist mein ueberholtes DSL. Der alte Mail Server proteus hat fast sein mandat vollbracht und wird nach vier Jahren rechenzeit abgeschaltet und in Rente gesetzt. Proteus wird genauergesagt am 13. Maerz abgeschaltet und ich habe schon etwas auf dem Server geloescht gestern abend. Uranus und goldflipper.net werden meine Haupt-Server sein fuer die naechsten zwei Jahre und wer weiss was dann kommt.


Blog starts to forget

February 6th, 2011

As indicated a few weeks ago, this blog will start to forget in a FIFO manner.

Wie versprochen vor ein paar Wochen wird dieser Blog anfangen zu vergessen in einer FIFO weise.

www.ipv6.solarscale.de March 7th, 2009
OpenBSD Donation March 1st, 2009
My SSH Tunnel February 25th, 2009
Why I chose static February 25th, 2009
Traceroute February 24th, 2009
The end of flavair.com February 17th, 2009
IPv6.solarscale.de February 12th, 2009
Back on the IPv6 Net!  Mo 2. Feb 14:25:20 CET 2009
A thought on the Economic Crisis Sun Feb 1 18:01:16 CET 2009
A New Beginning Fri Jan 16 19:34:10 CET 2009



February 4th, 2011

Well, I finally got my DSL upgrade for the next two years, I'm one happy camper.

Ich habe jetzt meine DSL Wartung bekommen fuer die naechsten zwei Jahre. Ich bin voll und super happy.


Another useless route through DE-CIX

February 2nd, 2011

When tracerouting free.fr from my vps which lies in Strasbourg the route goes from Strasbourg, to Frankfurt, back to Strasbourg and on from there this is wasteful and it would be better if there was a mini-exchange in Strasbourg itself taking on this traffic.

pjp@proteus:~> traceroute free.fr
traceroute to free.fr (, 30 hops max, 40 byte packets
 1  static-ip-85-25-57-148.inaddr.intergenia.de (  0.000 ms   0.000 ms   0.000 ms
 2 (  3.105 ms   3.182 ms   3.191 ms
 3 (  3.402 ms   3.340 ms   3.359 ms
 4  ve498.bbr1.fra3.inetbone.net (  3.346 ms   3.243 ms   3.260 ms
 5  decix.proxad.net (  4.041 ms   4.158 ms   3.975 ms
 6  strasbourg-6k-1-po101.intf.routers.proxad.net (  7.743 ms   7.580 ms   7.780 ms

Wenn man eine Traceroute nach free.fr macht von meinem vserver/vps das in Strassburg liegt sieht man das die route von Strassburg, nach Frankfurt und zurueck nach Strassburg geht und von dort aus dann weiter. Das ist natuerlich ein unsparsamer weg und es waere besser wenn da ein mini-exchange in Strassburg selber existiert das diesen Internet Verkehr uebernimmt.



February 2nd, 2011

This is for my Canadian friends. The small radio station CKLN needs your help. A long time ago (well actually 2 years ago) the Ryerson Student Union didn't want to pay for CKLN anymore and a fight ensued. This fight caused CKLN to go off-air for a number of months. Being off-air is a violation of the CRTC broadcasting license and the CRTC has revoked CKLN's license in the meantime. They have until February 12th to shut down.

So if you like alternative programming. If you like pro-gay, pro-lesbian, pro-minority programming CKLN is for you. And it's this voice that is so important in an equal and fair society. Here is a link that asks you to write your MP to save CKLN. As for me I'm not a citizen of Canada and my EuMP can't do much to help, but CKLN got my support in spirit. And that doesn't mean I'm gay. I'm not.


Outage for solarscale.de

January 31st, 2011

I transferred the domain solarscale.de to another registrar and something blew up. The domain has its nameservers set to the old NS servers but the old registrar had deleted the domain from its nameservers as soon as the transfer was initiated. I'm losing email :-(. I'm not sure what caused this mess because the notify email was on the solarscale.de domain and that ceased as soon as the old registrar deleted the zone. I've written my current registrar and am awaiting answers. It could be a 5 day outtage. Not too cool.

Ich habe einen Domain Namen Transfer mit solarscale.de begonnen und irgendetwas ging schief. Der Domain hat jetzt gerade die Nameservers von den alten Registrar registriert und der alte Registrar hat die Namenseintrage der Zone schon geloescht (sobald der Transfer durchging). Ich verliere mail. :-(. Ich bin nicht sicher was diesen schlamassel produzierte da die notify emails am solarscale.de domain hingen und das hat natuerlich aufgehoert als die Zone geloescht wurde. Ich habe den Registrar geschrieben und erwarte 'ne antwort. Es koennte eine 5 taegige stoerung sein. Nicht so cool.

Update: Tue Feb 1 11:33:16 CET 2011 The nameservers I had specified had the zone solarscale.de in non-compliance with DEnic the german NIC. It finally switched over to the right nameservers and I'm happy. It may take another day for the right nameservers to propagate over to the new ones, but servers that haven't queried solarscale.de in the last day will get the right data like so:

$ ping -c 1 www.solarscale.de
PING www.solarscale.de ( 56(84) bytes of data.
64 bytes from goldflipper.net ( icmp_seq=1 ttl=55 time=104 ms

--- www.solarscale.de ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 104.848/104.848/104.848/0.000 ms

Die Namenserver die ich spezifiziert habe fuer die zone solarscale.de hatten SOA daten die DENIC das Deutsche NIC nicht annehmen wollte. Aber endlich ist es gelungen und ich bin froh. Es koennte noch einen Tag dauern bis die NS eintraege propagiert sind, aber server die solarscale.de noch nicht angeschaut haben werden die richtigen daten erhalten.


DE-CIX growth: It doesn't have to be like that

January 29th, 2011

A recent article (german) predicts the future for the German Internet Exchange (in Frankfurt) called DE-CIX. They predict that the traffic will increase 20 fold by 2015. In a traceroute from my DSL it shows the route going from Schweinfurt to Nuremberg to Frankfurt (DE-CIX) back to Erlangen (which is 30 km away from Nuremberg) and there to the ftp.de.openbsd.org server that serves my packages for OpenBSD. It's a route that makes little sense, and if Erlangen was connected for cheap to N-IX (the Nuremberg Internet Exchange) then a lot of traffic would be kept away from DE-CIX strengthening the Internet as there isn't that single point of failure in the way.

A route showing path from schweinfurt-nuremberg-frankfurt-erlangen...
 4  ppp-default.m-online.net (  68.485 ms  50.483 ms  46.633 ms
 5  gi1-8-171.r1.nue2.m-online.net (  45.863 ms  47.948 ms  46.186 ms
 6  xe-2-2-0.rt-decix.m-online.net (  49.903 ms  49.974 ms  49.825 ms
 7  zr-fra1-te0-0-0-3.x-win.dfn.de (  50.725 ms  51.753 ms  52.530 ms
 8  zr-erl1-te0-0-0-4.x-win.dfn.de (  64.62 ms  66.4 ms  65.651 ms

Ein kuertzlicher Artikel prognostiziert die Zukunft des Deutschen Internet Exchange (in Frankfurt am Main) der DE-CIX heisst. Sie prognostizieren das der Internet Verkehr um das 20 fache steigen wird bis 2015. In einer traceroute von meinem DSL zeigt es das die Route von Schweinfurt durch Nuernberg, durch Frankfurt (DE-CIX) und von dort zurueck nach Erlangen geht (was 30 KM von Nuernberg ist). Den Server fuer die Route ist ftp.de.openbsd.org der OpenBSD Packete haust. Diese Route macht wenig Sinn und falls Erlangen mit einer billigen Leitung direkt and den N-IX (Nuernberg Internet Exchange) angeschlossen waehre dann wuerde viel Verkehr von DE-CIX weggeleitet werden. Diese wuerde das Internet staerken da es kein einzelnen Bruchpunkt (Frankfurt) gibt.


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