News items for tag vroegah - Koos van den Hout

2019-07-10 Einde van (weer) een tijdperk: geen DVB-T meer in Nederland
DVB logo Op 9 Juli is de laatste omschakeling van DVB-T naar DVB-T2 geweest in Nederland, waarmee DVB-T ten einde gekomen is. In de ether is dus van 2 oktober 1951 tot 10 december 2006 analoog uitgezonden en van 10 december 2006 tot 2 oktober 2018 (eerste regio) - 9 juli 2019 (laatste regio) in DVB-T.

De Samsung televisie die we aangeschaft hebben in mei 2013 snapt er niets meer van bij een scan op het UHF spectrum. Vooraf had ik gezocht of deze televisie DVB-T2 en de gebruikte codec ondersteunde en dat was wat onduidelijk, het hing af van de taal van de handleiding. Uiteindelijk werkt het dus duidelijk niet, de scan voor digitale tv signalen levert helemaal geen resultaat op.

Dus we hebben geen NPO 1/2/3 meer free-to-air wat we gebruikten sinds de prijsverhogingen en wijzigingen van Ziggo in 2015. Bij een eerste test bleken de livestreams van de NPO applicatie met chromecast ook te werken. Alleen heeft een hapering van de internetverbinding ook gelijk het gevolg dat de televisie stopt.

Het voelt wel raar om voor 'broadcast' televisie een stream aan te zetten, maar dat zal wel liggen aan de geschiedenis die er voor mij achter zit.

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2019-01-12 Enabling some old web userdirs
I received a "complaint" that a very old site on the webserver wasn't working anymore. I am not a person to just stop something without planning that so this was an oversight. It was one of the userdirs on idefix.net: Ivo van der Wijk who hasn't updated the page sinds 1994. No, really, not even the broken links.

In restoring this one and the others I found that php in userdirs is disabled by default nowadays, found via PHP not working in userdir (public_html) - devPlant. Maybe a good idea, but I only enable php on virtualhosts where I want it, so I disabled that rule. I hadn't missed it on my own webspace yet, but a site like Het online dagboek van hester (Renate) in Australie (en daar in de buurt) depend on PHP completely.

While I was looking for the reason the php failed I also noticed that /etc/apache2/mods-available/userdir.conf also has some configuration I do not appreciate, it enables userdirs globally when the module is loaded:
<IfModule mod_userdir.c>
        UserDir public_html
        UserDir disabled root

        <Directory /home/*/public_html>
                AllowOverride FileInfo AuthConfig Limit Indexes
                Options MultiViews Indexes SymLinksIfOwnerMatch IncludesNoExec
                Require method GET POST OPTIONS
        </Directory>
</IfModule>
I disabled that part: I only want the userdir to work on specific virtual hosts.

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2018-10-21 One of my first radio contacts (re)confirmed
From time to time I check whether eQSL has new incoming confirmations for PD4KH contacts. Recently I found one for a contact that goes way back, and it was before I used a linux radio logging program so I did not have the details stored in my logging program. But my website still has those details: Vanavond vanuit de achtertuin contact met PI4HAL via repeater PI3UTR.

It turns out PI4HAL decided to stop sending out paper cards and started using eQSL. I guess they uploaded all old logs.

I do remember the contact and being nervous about actually talking "on the air" and finding my turn between other callers to that station.

This was a trigger for me to check my old logs and make sure I upload things correctly to ARRL Logbook of The World including the few satellite contacts.

Oh and I never started using hrdlog as PE4KH. It did not add a lot for me.
Read the rest of One of my first radio contacts (re)confirmed

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2018-09-24 After 25 years with sendmail there was still something to improve
I still like running sendmail on my own systems. But sendmail evolves with time and my configuration does improve slightly sometimes, such as on the introduction of authenticated smtp with secondary passwords.

After the recent upgrades to the home server there is a new mail server with some other new details and suddenly other systems at home could not relay. A bit of searching found Best practice: sendmail and SMTP auth with the right flags for the DAEMON_OPTIONS to only offer authentication on port 587 (submission).

I noticed the local systems tried relaying via port 587 so I changed this to port 25 where IP-based relaying is allowed. No idea why I set this up to use the port 587 when I set it up previously.

And yes, I checked it, I started with sendmail in 1993, so 25 years of sendmail on port 25. I did start with writing my own sendmail.cf rules but I switched to .mc based configurations.

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2018-09-14 IT attacks in higher education have interesting holiday patterns
According to this article: Students blamed for university and college cyber-attacks - BBC News the new pattern is that attacks on IT systems in higher education happen in active times in education.

Interesting quote (for me):
There was a very sharp decline in attacks in the Christmas, Easter and summer breaks and during half-terms - with attacks rising again sharply when terms resumed.
I remember starting in system administration and learning quickly that the Christmas holidays period was the busiest period in attempts to break in to computer systems all over the world. This was simply explained by the fact that the Christmas holidays are the most universal school holiday in the world and all the teenage hackers had time to play with computers, modems and networks.

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2018-07-10 Found the original article about Steven K. Roberts and his recumbent bicycle Behemoth
Steven K. Roberts on Behemoth II I noticed the Nomadic Research Labs site was cleaned up a bit more, so I searched again for the article that I read in August 1995 about Steven K. Roberts and his recumbent bicycle Behemoth: "Big Electronic Human-Energised Machine ... Only Too Heavy".

The scans are at BEHEMOTH in Kijk – Dutch Magazine. Interesting detail is that the top left text refers to a picture of a Challenge recumbent. I recently ordered a new Challenge recumbent! Maybe I should find out whether I can find that page of that magazine.

Several things can be related to seeing this article: buying the book Computing Across America, selecting a recumbent bicycle later in life and this idea in the back of my head of future recumbent cycling trips.

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2018-04-06 25 years of Linux use
Powered by Linux In looking at a problem with the linuxcounter script I noticed I am now passing the 25 years with Linux mark. I first saw it in the beginning of 1993 when part of my internship happened at the 'expa' lab of Hogeschool Utrecht with SLS Linux.

Anyway, still using Linux a lot. It's been an interesting 25 years!

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2018-02-01 TV plannen van 50 jaar geleden
Tekst over TV uit Februari 1958 Iedere maand verschijnt er een Electron van 50 jaar geleden op Electron 50 jaar geleden en daar kijk ik graag even in, om het 'nieuws' op amateurradio gebied van 50 jaar geleden te zien. In die van Februari 1958 viel me een stukje op onder het kopje "Televisie" met:
Voor onze lezers is het wellicht interresant, te weten dat Philips op Maandag het normale TV-programma relayeert in band V: beelddraaggolf 772,25 MHz, geluidsdraaggolf 777,75 MHz. Amateurexperimenten in deze band zijn van veel belang, want ondanks de ontvangstmoeilijkheden, die er nog zijn, kon het toch wel eens dé TV-band van de toekomst blijken te zijn. Een voordeel van deze band is natuurlijk in de eerste plaats het grote aantal beschikbare kanalen - de band loopt van 610-960 MHz! -. De commerciële televisie, die in ons land ook nog eens op gang hoopt te komen, vlast natuurlijk op een aantal kanalen in die band. Een ander voordeel is, dat de antennes zo klein kunnen zijn, hetgeen het stedenschoon ten goede zal komen.
Ondertussen is analoge TV opgekomen in de UHF band en weer gestaakt. Opvallend is voor mij ook dat de genoemde draaggolf frequenties niet uitgekomen zijn op latere UHF kanalen. De afstand van 5 MHz tussen de audio en video draaggolf klopt wel met de analoge TV op UHF standaarden van later.

Commerciële TV via de analoge etherkanalen is er nooit gekomen, dat is heel lang tegen gehouden en later via kabel/satelliet opgekomen en pas bij de digitalisering kwam er ruimte voor digitale TV via de ether. Het deel van de UHF band gereserveerd voor TV-kanalen is ook gekrompen, ondertussen zijn we aan het werken naar een einde bij 700 MHz.

Mooi om zo'n voorspelling te zien en te vergelijken met de huidige realiteit.

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2017-11-13 The television version of "The Cuckoo's Egg"
I read the Dutch version of "The Cuckoo's Egg" when it came out in 1989. Later I bought the English version.

Via a complete diversion I found out this weekend the book was made into a TV documentary: The KGB, the Computer and Me which has a lot less personal diversions than the book. It is played by Clifford Stoll himself and others involved in the original story. Although the CIA guys look a bit more stereotypical than they come out in the book.

A very interesting part is there is a closing remark in the documentary by Markus Hess. Now I want to get a view of the movie of the other side, '23'.

The funny part is that I found this documentary from following news related to amateur radio: Cliff Stoll -- K7TA -- Has THE KNACK. And a GREAT NOVA Video. Clifford Stoll does have a callsign: K7TA

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2017-10-15 Getting to play VIC-20 games again
VIC-20 startscreen Ages ago my first homecomputer was a Commodore VIC-20. I did basic programming on it and played some games. I remember the game Centipede and loading games from audio cassette.

These days games seem to be enormously complex and expensive or filled with advertisments. I don't like these, the last time I seriously invested time in a game was Pinball Dreams.

I found out about the VIC-20 emulator xvic, part of the vice package. I even bought a cheap USB joystick to use. I never had a joystick with my VIC-20 so it was about time to get one. This joystick is a DragonRise Inc. Generic USB Joystick (yes, including the spaces) and I noticed today it wasn't working right: up and down on the joystick did not work. I found out eventually the left and right on the second stick mapped to up and down, thanks to a simple joystick tester from Joystick - Denialwiki in 7 lines of Basic.

Some searching found DragonRise USB Driver Issue - RetroPie which mentions this issue in hid-dr.ko happened in Linux 4.4 - 4.9.

I did not feel like going back to compiling my own kernels for this laptop, but there is a simple solution in Ubuntu 16.04: use hwe (hardware enablement) kernels. These seem to be aimed at the long term support server versions, but they fix my joystick problem and I can play centipede.

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IPv6 check

Running test...
, reachable as koos+website@idefix.net. PGP encrypted e-mail preferred. PGP key 5BA9 368B E6F3 34E4 local copy PGP key 5BA9 368B E6F3 34E4 via keyservers

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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.
Other webprojects: Camp Wireless, wireless Internet access at campsites, The Virtual Bookcase, book reviews
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