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Koos van den Hout

Welcome. This is my homepage where I write about my opinion, projects, things I note, things I try and other random stuff. Newsitems have tags for a bit of structure.

Latest news/thoughts/geeking/rants/notablog

2014-11-21 (#) 8 hours ago
It seems I am a very special person for google: the 'Birthdays' calendar which should be filled with the birthdays of all people in your google+ circles had the option to remove it from the list of calendars or unsubscribe totally. After being on the receiving end of some rants about this it is clear a lot of people don't have the option to get rid of this calendar. I found a possible workaround: How to delete the Birthdays Calendar from your Google Calendar.

Tags: ,
2014-11-17 (Interesting WTF-8 breakage + html escaping) 4 days ago
Google+Koos van den Hout : Interesting WTF-8 breakage + html escaping
2014-11-17 (#) 4 days ago
I recently took some pictures of the HF dipole antenna in our attic:
Attic dipole center - Koos van den Hout on flickr
Attic dipole center - Center of the 10 meter/20 meter dipole in the attic
Attic dipole ugly balun - Koos van den Hout on flickr
Attic dipole ugly balun - Ugly balun for the 10 meter/20 meter dipole in the attic
The 'real' current balun is ready, but needs different antenna connectors. It does use PL259 connectors but the surrounding weather cover means I can't secure the BNC - PL259 connector I use at the moment. Better cable and connectors are on order.

I also borrowed the antenna analyzer from the radio club and measured this antenna. It turned out the frequencies with the best SWR (1 to 1.1) are below the planned frequencies on both the 10 meter and 20 meter band. It was supposed to be at 28.120 MHz and 14.070 MHz, it turned out somewhere 26.97 MHz and 13.20 MHz. The good news is that means the antenna wires are too long and need shortening. I'll probably do that 'for real' when I have different antenna cable and connectors to use the balun.

Tags: ,
2014-11-16 (#) 5 days ago
The current rainy weather is reasonably deadly for any transmitting, given the report from Digital mode reception maps at pskreporter.info which states:
Monitoring PD4KH (last heard 20 hrs ago).
while I am quite sure I transmitted PSK31 CQs and answers more recently than that and the 10 meter band being open according to the same site.

The attic dipole is right under the roof so any rain making the roof tiles wet is probably dampening the radio signals. This may get interesting when there is snow on the roof. I imagine some raised eyebrows when there is an antenna shaped hole in the snow on the roof.

Tags: , ,
2014-11-13 (#) 1 week ago
De forumthread RTV Rijnmond: zendamateur bergschenhoek stoort hele buurt - zendamateur.com deed mij denken aan een heel goed stuk wat ik eerder tegenkwam: Voor de buren - PD5WL. Een heel leesbaar verhaal voor de buren van zendamateurs wat op een leesbare manier omgaat met antennes, radio en eventuele storing. Het blijft natuurlijk vaak gaan om vooroordelen en emotie, maar deze uitleg is open en duidelijk zonder al te technisch te worden.

Ik heb nog geen antenne op het dak, maar al wel eens interesse gehad van een buurman waarom ik soms een antenne uit het zolderraam stak. Omdat ik nu ook actief ben op HF heb ik wel mezelf in het antenneregister gezet ook al is er niks zichtbaar: mocht er ooit iemand in de buurt reden hebben om het Agentschap Telecom te benaderen over storing die misschien over HF uitzendingen gaat dan kunnen ze simpel vinden dat ik hier soms actief ben.

Tags: ,
2014-11-13 (#) 1 week ago
Truth in e-mail virus attempts seen (note the filename) :
Subject: MDaemon Notification -- Attachment Removed

-----------------------------------------
order01.zip (order01\bot_crypted10394.scr)
Oh, and another one came through with attachment:
Archive:  order01.zip
  Length     Date   Time    Name
 --------    ----   ----    ----
   385024  11-12-14 17:00   order01/bot_crypted10394.scr
 --------                   -------
   385024                   1 file
$ md5sum order01.zip ; sha256sum order01.zip 
ad9cb44bb7d64a8c5b619a4d37e7eb97  order01.zip
ecd0ead687314c195a8072fe46fd513b46d61688c19398ec3edbfd6f92b4aca4  order01.zip
$ md5sum order01/bot_crypted10394.scr ; sha256sum order01/bot_crypted10394.scr 
509670b354f356dcd38f3d47408d9910  order01/bot_crypted10394.scr
93098ab5d8827339b17e4510676c40c79f6eb09c7cbb5cf0931100fce647a64f  order01/bot_crypted10394.scr
Lots of German text in the .scr file:
Mitgemeint7
Logistiktruppe
Landschaftsstreifen
Blumenart7
Friedensnobelpreis
Priesterausbildung
Luftmotor
Form
C:\prestigetr
chtigem\Durchmischend6\Rauchgasexplosion\VB98\VB6.OLB
Exzessiverem7
Raumverschwendungen7
Artikelstammwartung1
And I pasted the complete strings -a bot_crypted10394.scr into pastebin.

Tags: , ,
2014-11-12 (A good writeup of the current state of the Rosetta project by +Philip Plait. I kept an eye on things...) 1 week ago
Google+Koos van den Hout : A good writeup of the current state of the Rosetta project by +Philip Plait. I kept an eye on things today during work and it was awesome.
2014-11-11 (Ham Hijinks.. or for real?) 1 week ago
Google+Koos van den Hout : Ham Hijinks.. or for real?
2014-11-10 (Recent een keer met de camera tijdens werktijd een poosje rond het Wentgebouw kunnen wandelen. Imposant...) 1 week ago
Google+Koos van den Hout : Recent een keer met de camera tijdens werktijd een poosje rond het Wentgebouw kunnen wandelen. Imposant hoe zo'n hoge kraan bezig is.
2014-11-10 (#) 1 week ago
Interesting spam in my inbox lately, and I can't find one of the usual spamfighters writing about it. I don't know which language and the google translate auto detect thinks 'Slovak' but fails most of the translation.
privet. prisoedniaytes' k moei grupe vkontakte!!!! makeup ochen' deshevo!!!!!
http://vk.com/yulianna_kir
Takzhe so mnoi mozhno svyaztsya i uvidet' tekuschie raboti po
Instagram: #yuliannakir
Skype: kir_yulianna
Instagram: kir_yulianna
Vkontakte (vk.com) is a social network which has most of its visitors from eastern Europe. Vkontakte just happens to look a lot like facebook. I can find Yulianna Kir makeup artist on for example Instagram with a Russian phonenumber but it doesn't explain the spam, and trying google translate with the source language set to Russian doesn't work either.

So the reason of the spam and the profit model is inconclusive.

Tags: ,
2014-11-09 (A heatmap of cycle routes logged by Strava. I dislike the idea of gathering data like this because it...) 1 week ago
Google+Koos van den Hout : A heatmap of cycle routes logged by Strava. I dislike the idea of gathering data like this because it will be abused in ways that endanger your privacy, but on this aggregate level it shows interesting things like 'where are people cycling'. In this case the border between the Netherlands and Germany is quite visible. And cycling in London isn't as rare as some might think. Found via https://twitter.com/sdw/status/530806457080352768
#privacy #bigdata #visualisations  
2014-11-07 (#) 2 weeks ago
Interesting new problem: transmitting on 20 meter PSK31 causes the lightning strike detector of the Weather station Utrecht Overvecht to go slightly mad. If you look at the graphs it seems like there was a really heavy thunderstorm last Thursday but that's just the result of trying 20 meter PSK31 all day and making 11 QSOs (radio connections). Time to move the lightning detector to a better location: in the shed with the rest of the weather station.

Update 2014-11-08: And another side-effect: I used a really cheap gimmick USB hub to hook up the radio to the workstation because I needed an extra USB port for something else. The next thing that happened was the USB chip in the serial cable to the radio (CAT interface) completely locking up on transmitting. I also hear buzzing on speakers when I transmit on 20 meters so this is a big hint I need to change some things. At least a balun for the attic dipole is on the way.

Tags: , ,
2014-11-05 (Interesting opportunity for some student with a big interest in amateur satellites and in the right ...) 2 weeks ago
Google+Koos van den Hout : Interesting opportunity for some student with a big interest in amateur satellites and in the right part of her/his education.
2014-11-03 (#) 2 weeks ago
I tried NetworkManager again because wicd was showing downsides, such as:
  • Not dealing correctly when the laptop is resumed with the ethernet cable attached: it doesn't run dhcp on the wired lan which makes services which only have IPv4 addresses unreachable. Took a while to understand that one for obvious reasons.
  • Making the wired network interface flap between connected and disconnected state when a network cable is inserted after boot. Solution: restart wicd first.
I tried NetworkManager again, kicked out ages ago because it fully depended on a Gnome desktop, which I don't run. But now it has nm-connection-editor and nm-cli which should make things less impossible. But after testing I found out NetworkManager is even worse for me than wicd.
  • NetworkManager leaves wireless up when wired is running. The solution to this problem is a script from Disable WLan if Wired/Cable Network is available - Super User.
  • I noticed I was using IPv6 addresses with privacy extensions again, so I made a script in the same style as the previous script to disable that setting in case the home IPv6 network was detected and enable it for all other networks. This causes a loop in NetworkManager: it restarts the interface when it detects the change. This still on wireless.
  • Stopping NetworkManager left everything in a weird state: I found out it had disabled the support for router advertisments autoconfiguration in Linux. This was fixed easily on the wired network. Back to wicd.
  • The next day I booted the laptop with only wireless and network wasn't coming up at all. Even after a complete reboot the wireless wasn't operating, and the wireless disable switch was in the right position.
A hint came when I tried things by hand:
root@machiavelli:~# ifconfig wlan0 up
SIOCSIFFLAGS: Operation not possible due to RF-kill
I guess the script disabling wireless when wired ethernet is available does some heavier disabling than I thought.

The big hint is rfkill which is installed, and listed:
root@machiavelli:~# rfkill list
1: phy0: Wireless LAN
        Soft blocked: yes
        Hard blocked: no
2: dell-wifi: Wireless LAN
        Soft blocked: no
        Hard blocked: no
3: dell-bluetooth: Bluetooth
        Soft blocked: no
        Hard blocked: no
4: hci0: Bluetooth
        Soft blocked: no
        Hard blocked: no
And the solution:
root@machiavelli:~# rfkill unblock 1
root@machiavelli:~# rfkill list
1: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: no
2: dell-wifi: Wireless LAN
        Soft blocked: no
        Hard blocked: no
3: dell-bluetooth: Bluetooth
        Soft blocked: no
        Hard blocked: no
4: hci0: Bluetooth
        Soft blocked: no
        Hard blocked: no
After that (and restarting wicd to be sure) things worked normally again. So wicd may have its downsides, but NetworkManager is worse for me.

Tags: , , ,
2014-10-30 (So it's not just what I happen to read on google+ because I follow some Australians with interests in...) 3 weeks ago
Google+Koos van den Hout : So it's not just what I happen to read on google+ because I follow some Australians with interests in politics.
2014-10-29 (#) 3 weeks ago
As part of my job I write down security requirements in new projects. Those include 'connections between systems that transport non-public data need to be encrypted using up-to-date encryption'. At the same time, work is improving their testing procedures so new or upgraded applications come to production fully tested according to predefined testing scenarios. So now 'security' is also part of the test scenarios and I was asked to help build tests for our security requirements.

For secure websites it is easy, I use the Qualys SSL Labs SSL Server Test. But there are a lot more ssl secured connections in use, and I would like those verified too without having to expose them to the outside world. Preferably both from Unix and Windows endpoints. And automated and/or as a scenario that can be done by the responsible system administrators.

A simple websearch gave no answers but some asking around gave me SSLScan for Windows which is a windows port of SSLScan Fast SSL Scanner. It's even free, and it gives out just the reports I want:
D:\sslscan win>SSLScan.exe wwwsec.cs.uu.nl:443
                   _
           ___ ___| |___  ___ __ _ _ __
          / __/ __| / __|/ __/ _` | '_ \
          \__ \__ \ \__ \ (_| (_| | | | |
          |___/___/_|___/\___\__,_|_| |_|

                  Version 1.8.2-win
             http://www.titania.co.uk
        Copyright Ian Ventura-Whiting 2009
    Compiled against OpenSSL 0.9.8m 25 Feb 2010

Testing SSL server wwwsec.cs.uu.nl on port 443

  Supported Server Cipher(s):
    Rejected  SSLv2  168 bits  DES-CBC3-MD5
    Rejected  SSLv2   56 bits  DES-CBC-MD5
    Rejected  SSLv2  128 bits  IDEA-CBC-MD5
    Rejected  SSLv2   40 bits  EXP-RC2-CBC-MD5
    Rejected  SSLv2  128 bits  RC2-CBC-MD5
    Rejected  SSLv2   40 bits  EXP-RC4-MD5
    Rejected  SSLv2  128 bits  RC4-MD5
    Rejected  SSLv3  256 bits  ADH-AES256-SHA
    Rejected  SSLv3  256 bits  DHE-RSA-AES256-SHA
    Rejected  SSLv3  256 bits  DHE-DSS-AES256-SHA
    Rejected  SSLv3  256 bits  AES256-SHA
    Rejected  SSLv3  128 bits  ADH-AES128-SHA
    Rejected  SSLv3  128 bits  DHE-RSA-AES128-SHA
    Rejected  SSLv3  128 bits  DHE-DSS-AES128-SHA
    Rejected  SSLv3  128 bits  AES128-SHA
    Rejected  SSLv3  168 bits  ADH-DES-CBC3-SHA
    Rejected  SSLv3   56 bits  ADH-DES-CBC-SHA
    Rejected  SSLv3   40 bits  EXP-ADH-DES-CBC-SHA
    Rejected  SSLv3  128 bits  ADH-RC4-MD5
    Rejected  SSLv3   40 bits  EXP-ADH-RC4-MD5
    Rejected  SSLv3  168 bits  EDH-RSA-DES-CBC3-SHA
    Rejected  SSLv3   56 bits  EDH-RSA-DES-CBC-SHA
    Rejected  SSLv3   40 bits  EXP-EDH-RSA-DES-CBC-SHA
    Rejected  SSLv3  168 bits  EDH-DSS-DES-CBC3-SHA
    Rejected  SSLv3   56 bits  EDH-DSS-DES-CBC-SHA
    Rejected  SSLv3   40 bits  EXP-EDH-DSS-DES-CBC-SHA
    Rejected  SSLv3  168 bits  DES-CBC3-SHA
    Rejected  SSLv3   56 bits  DES-CBC-SHA
    Rejected  SSLv3   40 bits  EXP-DES-CBC-SHA
    Rejected  SSLv3  128 bits  IDEA-CBC-SHA
    Rejected  SSLv3   40 bits  EXP-RC2-CBC-MD5
    Rejected  SSLv3  128 bits  RC4-SHA
    Rejected  SSLv3  128 bits  RC4-MD5
    Rejected  SSLv3   40 bits  EXP-RC4-MD5
    Rejected  SSLv3    0 bits  NULL-SHA
    Rejected  SSLv3    0 bits  NULL-MD5
    Rejected  TLSv1  256 bits  ADH-AES256-SHA
    Rejected  TLSv1  256 bits  DHE-RSA-AES256-SHA
    Rejected  TLSv1  256 bits  DHE-DSS-AES256-SHA
    Accepted  TLSv1  256 bits  AES256-SHA
    Rejected  TLSv1  128 bits  ADH-AES128-SHA
    Rejected  TLSv1  128 bits  DHE-RSA-AES128-SHA
    Rejected  TLSv1  128 bits  DHE-DSS-AES128-SHA
    Accepted  TLSv1  128 bits  AES128-SHA
    Rejected  TLSv1  168 bits  ADH-DES-CBC3-SHA
    Rejected  TLSv1   56 bits  ADH-DES-CBC-SHA
    Rejected  TLSv1   40 bits  EXP-ADH-DES-CBC-SHA
    Rejected  TLSv1  128 bits  ADH-RC4-MD5
    Rejected  TLSv1   40 bits  EXP-ADH-RC4-MD5
    Rejected  TLSv1  168 bits  EDH-RSA-DES-CBC3-SHA
    Rejected  TLSv1   56 bits  EDH-RSA-DES-CBC-SHA
    Rejected  TLSv1   40 bits  EXP-EDH-RSA-DES-CBC-SHA
    Rejected  TLSv1  168 bits  EDH-DSS-DES-CBC3-SHA
    Rejected  TLSv1   56 bits  EDH-DSS-DES-CBC-SHA
    Rejected  TLSv1   40 bits  EXP-EDH-DSS-DES-CBC-SHA
    Accepted  TLSv1  168 bits  DES-CBC3-SHA
    Rejected  TLSv1   56 bits  DES-CBC-SHA
    Rejected  TLSv1   40 bits  EXP-DES-CBC-SHA
    Rejected  TLSv1  128 bits  IDEA-CBC-SHA
    Rejected  TLSv1   40 bits  EXP-RC2-CBC-MD5
    Accepted  TLSv1  128 bits  RC4-SHA
    Rejected  TLSv1  128 bits  RC4-MD5
    Rejected  TLSv1   40 bits  EXP-RC4-MD5
    Rejected  TLSv1    0 bits  NULL-SHA
    Rejected  TLSv1    0 bits  NULL-MD5

  Prefered Server Cipher(s):
    TLSv1  128 bits  RC4-SHA

  SSL Certificate:
    Version: 2
    Serial Number: -4294967295
    Signature Algorithm: sha1WithRSAEncryption
    Issuer: /C=NL/O=TERENA/CN=TERENA SSL CA
    Not valid before: Mar 15 00:00:00 2012 GMT
    Not valid after: Mar 15 23:59:59 2015 GMT
    Subject: /C=NL/O=Universiteit Utrecht/CN=wwwsec.cs.uu.nl
    Public Key Algorithm: rsaEncryption
    RSA Public Key: (2048 bit)
      Modulus (2048 bit):
          00:da:af:31:f2:39:f5:66:d0:d5:96:5e:1d:1e:7a:
          86:ba:3f:79:79:98:da:30:79:32:39:99:47:88:ea:
          6c:2e:a0:2a:9b:29:0a:48:9e:0f:9e:9d:e1:9a:32:
          8d:a6:ab:7b:bb:73:62:0a:43:31:cd:78:02:14:09:
          23:b7:d1:28:4a:2e:b8:c0:c9:ea:7a:9b:5c:4b:ae:
          73:af:7b:82:4d:dd:e9:ec:8f:6e:13:c9:db:d4:d0:
          92:9f:d3:88:69:c2:d3:61:32:76:d6:12:d0:45:d7:
          c2:89:fb:cb:24:b0:5e:6b:11:89:5c:3b:3e:8b:02:
          9b:3a:62:ca:ac:47:d1:97:1d:02:bd:50:2b:50:e5:
          be:55:f5:54:5c:68:99:28:c6:ca:05:70:79:84:1a:
          24:6d:02:de:16:74:8b:05:ce:f0:9c:71:27:c0:99:
          22:66:2e:00:31:ca:b7:1c:9d:78:8e:6e:e0:8f:94:
          4d:42:a7:89:8f:8d:d4:3a:1d:91:e6:c8:59:a1:59:
          3b:b3:e7:54:21:3c:38:0b:d3:27:37:33:48:8f:f4:
          e0:ba:e7:33:17:9b:a2:b1:b4:f0:7a:35:b3:27:4c:
          81:ad:76:91:78:52:1a:18:bf:18:c9:93:84:aa:79:
          49:ec:43:fe:56:5b:cc:82:ad:44:c7:4b:79:8f:d1:
          6d:9d
      Exponent: 65537 (0x10001)
    X509v3 Extensions:
      X509v3 Authority Key Identifier:
        keyid:0C:BD:93:68:0C:F3:DE:AB:A3:49:6B:2B:37:57:47:EA:90:E3:B9:ED

      X509v3 Subject Key Identifier:
        99:E4:5C:2F:C5:E8:4F:D1:A5:91:AA:0B:28:18:F2:EF:2A:96:4B:49
      X509v3 Key Usage: critical
        Digital Signature, Key Encipherment
      X509v3 Basic Constraints: critical
        CA:FALSE
      X509v3 Extended Key Usage:
        TLS Web Server Authentication, TLS Web Client Authentication
      X509v3 Certificate Policies:
        Policy: 1.3.6.1.4.1.6449.1.2.2.29

      X509v3 CRL Distribution Points:
        URI:http://crl.tcs.terena.org/TERENASSLCA.crl

      Authority Information Access:
        CA Issuers - URI:http://crt.tcs.terena.org/TERENASSLCA.crt
        OCSP - URI:http://ocsp.tcs.terena.org

      X509v3 Subject Alternative Name:
        DNS:wwwsec.cs.uu.nl, DNS:wwws.cs.uu.nl
  Verify Certificate:
    self signed certificate in certificate chain
At this moment it complains about a self-signed certificate because I haven't given it a list of root certificates. I can't find out at the moment how to fix that, it doesn't seem to check the list of root certificates or not in a place I put them.

Tags: ,
2014-10-26 (#) 3 weeks ago
Waving to China:
Oct 26 12:42:43 abaris sshd[4602]: User root from 122.225.109.114 not allowed because none of user's groups are listed in AllowGroups
Oct 26 12:43:22 abaris sshd[4605]: User root from 122.225.109.114 not allowed because none of user's groups are listed in AllowGroups
Oct 26 12:44:19 abaris sshd[4608]: User root from 122.225.109.114 not allowed because none of user's groups are listed in AllowGroups
Oct 26 16:10:09 abaris sshd[5655]: User root from 122.225.97.84 not allowed because none of user's groups are listed in AllowGroups
Oct 26 16:10:29 abaris sshd[5658]: User root from 122.225.97.84 not allowed because none of user's groups are listed in AllowGroups
Oct 26 16:11:19 abaris sshd[5663]: User root from 122.225.97.84 not allowed because none of user's groups are listed in AllowGroups
Oct 26 17:11:10 abaris sshd[5929]: User root from 122.225.109.215 not allowed because none of user's groups are listed in AllowGroups
Oct 26 17:11:41 abaris sshd[5933]: User root from 122.225.109.215 not allowed because none of user's groups are listed in AllowGroups
Oct 26 17:12:40 abaris sshd[5937]: User root from 122.225.109.215 not allowed because none of user's groups are listed in AllowGroups
Oct 26 19:02:41 abaris sshd[6434]: User root from 122.225.109.195 not allowed because none of user's groups are listed in AllowGroups
Oct 26 19:03:13 abaris sshd[6438]: User root from 122.225.109.195 not allowed because none of user's groups are listed in AllowGroups
Oct 26 19:03:55 abaris sshd[6444]: User root from 122.225.109.195 not allowed because none of user's groups are listed in AllowGroups
Oct 26 19:06:29 abaris sshd[6466]: User root from 122.225.109.108 not allowed because none of user's groups are listed in AllowGroups
Oct 26 19:06:59 abaris sshd[6470]: User root from 122.225.109.108 not allowed because none of user's groups are listed in AllowGroups
Oct 26 19:07:42 abaris sshd[6473]: User root from 122.225.109.108 not allowed because none of user's groups are listed in AllowGroups
Oct 26 19:54:45 abaris sshd[6744]: User root from 122.225.109.217 not allowed because none of user's groups are listed in AllowGroups
Oct 26 19:55:21 abaris sshd[6749]: User root from 122.225.109.217 not allowed because none of user's groups are listed in AllowGroups
Oct 26 19:56:00 abaris sshd[6754]: User root from 122.225.109.217 not allowed because none of user's groups are listed in AllowGroups
I guess Shaoxing Dingqi Network Technology Co., Ltd. and WENZHOU GAOJIE TECHNOLOGY CO.LTD have a problem with intruders abusing their systems to attack third parties or they might just be very interested in attacking a certain class of systems.

Tags: ,
2014-10-23 (Knibbel, knabbel, knuisje, wie knabbelt daar aan mijn huisje? Sloop #wentgebouw te volgen via http:/...) 4 weeks ago
Google+Koos van den Hout : Knibbel, knabbel, knuisje, wie knabbelt daar aan mijn huisje?
Sloop #wentgebouw te volgen via http://www.projects.science.uu.nl/webcams/ met ook een timelapse.
Final part of demolishing a university building, taking out the floors and columns. Live webcam and timelapse video via url above.

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The person

Father, cat owned/owner, Unix/Linux fan, Internet user, reader, recumbent byciclist, snowboarder, ipv6 fan. For those who don't speak Dutch: how to pronounce Koos van den Hout.

The job

Specialist information security at Utrecht University with a modern Profile page.
 

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Your IPv4 address is 54.226.147.84 in United States

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Airpressure : 1015.7 hPa

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Koos van den Hout, reachable as koos+website@koos.idefix.net. PGP key DSS/1024 2C66 3B5D F0D7 C263 via keyservers PGP key DSS/1024 2C66 3B5D F0D7 C263 local copy pgp key statistics for 0x2C663B5DF0D7C263 Koos van den Hout
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Meningen zijn die van mezelf, wat ik schrijf is beschermd door auteursrecht. Sommige publicaties bevatten een expliciete vermelding dat ze ongevraagd gedeeld mogen worden.
My opinions are my own, what I write is protected by copyrights. Some publications contain an explicit license statement which allows sharing without asking permission.
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