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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

2015-04-14 (De ontwikkeling is niet nieuw maar het is goed om het zo leesbaar te zien) 3 days ago
Google+Koos van den Hout : De ontwikkeling is niet nieuw maar het is goed om het zo leesbaar te zien
2015-04-14 (The last pass sunday 21:15 utc with just partial decodes.) 3 days ago
Google+Koos van den Hout : The last pass sunday 21:15 utc with just partial decodes.
2015-04-13 Partially decoded images from the last ISS pass with SSTV active over my location 4 days ago
RS0ISS image 11 (part) RS0ISS image 11 (part) RS0ISS image (part)

From the last pass of the ISS with SSTV active over my location some partial decodes, this is where qsstv has some problems. That's why the above are posted screengrabs, qsstv decided not to want to save the partial images.

This pass started at 21:15 UTC, slowscan TV was scheduled to end at 21:30 UTC.

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2015-04-13 (You don't know Flack is one of the podcasts I follow. This episode is about something that's part of...) 4 days ago
Google+Koos van den Hout : You don't know Flack is one of the podcasts I follow. This episode is about something that's part of life in the US midwest: tornadoes.
I am interested in the weather and I watched Twister and the Storm Chasers. This is the other side: being in the area or being in that house where the tornado can strike next.
My compliments to Rob "Flack" O'Hara.
#podcast #tornadoes
2015-04-12 (Parade for Yuri Gagarin. From the 19:39 pass at my location. Number 8 of the series. The pass started...) 5 days ago
Google+Koos van den Hout : Parade for Yuri Gagarin.
From the 19:39 pass at my location. Number 8 of the series. The pass started with a different image running but I haven't tickled qsstv into decoding that yet.
2015-04-12 (From the pass 16:27 utc here. Partial decode, but I tickled qsstv into saving it. I also heard voices...) 5 days ago
Google+Koos van den Hout : From the pass 16:27 utc here. Partial decode, but I tickled qsstv into saving it. I also heard voices, probably Russian on the downlink.
2015-04-12 Partial decode of an image from RS0ISS 5 days ago
RS0ISS decoded image commemorative diploma From the pass over my location (16:27 UTC) I decoded this partial image. I also heard speaking what sounded like Russian, with for me clear "Romeo Sierra .. India Sierra Sierra" so I guess there is one lucky russian radio amateur with a confirmed contact with RS0ISS.

Recording added to this post. I am looking for a transcription and translation.
Listen to audio attachment:
MP3 media: Part of ISS pass at JO22NC, voice traffic 2015-04-12-1627 by PD4KH (rightclick, select save-as to download)

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2015-04-12 Parade for Yuri Gagarin 5 days ago
Parade for Yuri Gagarin, in memory of Yuri Gagarin, image 8 of the RS0ISS series This evening pass (19:39 UTC) had a less good timing for me, but almost a full image decode. On the start of the pass a previous image was running but I can't make qsstv pick that up.

Image 8 of the RS0ISS series.

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2015-04-12 ("Man Enters Space", in memory of Yuri Gagarin Image 2 of the RS0ISS series. Received at locator JO22NC...) 5 days ago
Google+Koos van den Hout : "Man Enters Space", in memory of Yuri Gagarin

Image 2 of the RS0ISS series. Received at locator JO22NC, pass starting 11 april 2015 20:33 UTC.
.. and I'll have to explain our neighbours that wasn't a car alarm somewhere but just an image from space.

Equipment: video tripod, Arrow dual band antenna (but only 2 meter connected to the radio), FT-857 radio with gpredict doing the tuning and showing me where to point the antenna. Recording the audio with audacity and decoding the images from the recording with qsstv.

Normally I set up gpredict to ignore any passes below 15⁰ elevation, signal from most amateur satellites will be too weak. RS0ISS is high-power so I have to set the minimum elevation to 5⁰.
2015-04-11 Man Enters Space, in memory of Yuri Gagarin 6 days ago
Man Enters Space, in memory of Yuri Gagarin, image 2 of the RS0ISS series Another chance this weekend for receiving images from the russians aboard the International Space Station (callsign RS0ISS). I had luck again with this pass and one image came through near-perfect.

Image 2 of the RS0ISS series.

Equipment: video tripod, Arrow dual-band antenna with just the 2 meter antenna connected to the radio, FT-857 radio. Laptop controlling the radio with gpredict and recording the audio with audacity. Decoding the recorded audio with qsstv.

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2015-04-11 (Italian engineering at its finest) 6 days ago
Google+Koos van den Hout : Italian engineering at its finest
2015-04-10 No I gave up on ftp years ago 1 week ago
I am used to seeing ftp scans (single packet) or real connect attempts (three packets) in the firewall logs from time to time. But this is new, the last few days there have been repeated connection attempts (3 packets for each source port) from several different IPv4 addresses.
Apr  9 09:45:07 greenblatt kernel: [9368095.406323] FW reject: IN=ppp0 OUT= MAC= SRC=46.119.76.40 DST=xx.xx.xx.xx LEN=48 TOS=0x00 PREC=0x00 TTL=111 ID=54188 DF PROTO=TCP SPT=42284 DPT=21 WINDOW=64380 RES=0x00 SYN URGP=0
Apr  9 09:45:07 greenblatt kernel: [9368095.406636] FW reject: IN=ppp0 OUT= MAC= SRC=46.119.76.40 DST=xx.xx.xx.xx LEN=48 TOS=0x00 PREC=0x00 TTL=111 ID=54189 DF PROTO=TCP SPT=42285 DPT=21 WINDOW=64380 RES=0x00 SYN URGP=0
Apr  9 09:45:08 greenblatt kernel: [9368095.600015] FW reject: IN=ppp0 OUT= MAC= SRC=46.119.76.40 DST=xx.xx.xx.xx LEN=48 TOS=0x00 PREC=0x00 TTL=111 ID=54206 DF PROTO=TCP SPT=42284 DPT=21 WINDOW=64380 RES=0x00 SYN URGP=0
Apr  9 09:45:08 greenblatt kernel: [9368095.600329] FW reject: IN=ppp0 OUT= MAC= SRC=46.119.76.40 DST=xx.xx.xx.xx LEN=48 TOS=0x00 PREC=0x00 TTL=111 ID=54207 DF PROTO=TCP SPT=42285 DPT=21 WINDOW=64380 RES=0x00 SYN URGP=0
Apr  9 09:45:08 greenblatt kernel: [9368095.800311] FW reject: IN=ppp0 OUT= MAC= SRC=46.119.76.40 DST=xx.xx.xx.xx LEN=48 TOS=0x00 PREC=0x00 TTL=111 ID=54209 DF PROTO=TCP SPT=42284 DPT=21 WINDOW=64380 RES=0x00 SYN URGP=0
Apr  9 09:45:08 greenblatt kernel: [9368095.834389] FW reject: IN=ppp0 OUT= MAC= SRC=46.119.76.40 DST=xx.xx.xx.xx LEN=48 TOS=0x00 PREC=0x00 TTL=111 ID=54216 DF PROTO=TCP SPT=42298 DPT=21 WINDOW=64380 RES=0x00 SYN URGP=0

Apr  9 15:19:31 greenblatt kernel: [9376229.358588] FW dropped: IN=ppp0 OUT= MAC= SRC=46.119.76.40 DST=xx.xx.xx.xx LEN=48 TOS=0x00 PREC=0x00 TTL=111 ID=21161 DF PROTO=TCP SPT=13089 DPT=21 WINDOW=64380 RES=0x00 SYN URGP=0
Apr  9 15:19:34 greenblatt kernel: [9376230.559851] FW dropped: IN=ppp0 OUT= MAC= SRC=46.119.76.40 DST=xx.xx.xx.xx LEN=48 TOS=0x00 PREC=0x00 TTL=111 ID=21180 DF PROTO=TCP SPT=13089 DPT=21 WINDOW=64380 RES=0x00 SYN URGP=0
Apr  9 15:19:40 greenblatt kernel: [9376232.980904] FW dropped: IN=ppp0 OUT= MAC= SRC=46.119.76.40 DST=xx.xx.xx.xx LEN=48 TOS=0x00 PREC=0x00 TTL=111 ID=21224 DF PROTO=TCP SPT=13089 DPT=21 WINDOW=64380 RES=0x00 SYN URGP=0

Apr 10 08:21:04 greenblatt kernel: [9402534.350429] FW reject: IN=ppp0 OUT= MAC= SRC=117.204.35.104 DST=xx.xx.xx.xx LEN=52 TOS=0x00 PREC=0x00 TTL=112 ID=9124 DF PROTO=TCP SPT=10002 DPT=21 WINDOW=65535 RES=0x00 SYN URGP=0
Apr 10 08:21:04 greenblatt kernel: [9402534.653582] FW reject: IN=ppp0 OUT= MAC= SRC=117.204.35.104 DST=xx.xx.xx.xx LEN=52 TOS=0x00 PREC=0x00 TTL=112 ID=9273 DF PROTO=TCP SPT=10002 DPT=21 WINDOW=65535 RES=0x00 SYN URGP=0
Apr 10 08:21:05 greenblatt kernel: [9402535.002381] FW reject: IN=ppp0 OUT= MAC= SRC=117.204.35.104 DST=xx.xx.xx.xx LEN=52 TOS=0x00 PREC=0x00 TTL=112 ID=9320 DF PROTO=TCP SPT=10002 DPT=21 WINDOW=65535 RES=0x00 SYN URGP=0
Apr 10 08:22:25 greenblatt kernel: [9402566.855279] FW reject: IN=ppp0 OUT= MAC= SRC=117.204.35.104 DST=xx.xx.xx.xx LEN=52 TOS=0x00 PREC=0x00 TTL=112 ID=12941 DF PROTO=TCP SPT=10436 DPT=21 WINDOW=65535 RES=0x00 SYN URGP=0
Apr 10 08:24:00 greenblatt kernel: [9402604.705345] FW reject: IN=ppp0 OUT= MAC= SRC=117.204.35.104 DST=xx.xx.xx.xx LEN=52 TOS=0x00 PREC=0x00 TTL=112 ID=16545 DF PROTO=TCP SPT=10882 DPT=21 WINDOW=65535 RES=0x00 SYN URGP=0
Apr 10 08:25:45 greenblatt kernel: [9402646.825970] FW reject: IN=ppp0 OUT= MAC= SRC=117.204.35.104 DST=xx.xx.xx.xx LEN=52 TOS=0x00 PREC=0x00 TTL=112 ID=21008 DF PROTO=TCP SPT=11378 DPT=21 WINDOW=65535 RES=0x00 SYN URGP=0

Apr 10 09:35:50 greenblatt kernel: [9404337.065473] FW reject: IN=ppp0 OUT= MAC= SRC=117.204.35.104 DST=xx.xx.xx.xx LEN=52 TOS=0x00 PREC=0x00 TTL=112 ID=1738 DF PROTO=TCP SPT=11259 DPT=21 WINDOW=65535 RES=0x00 SYN URGP=0
Apr 10 09:35:51 greenblatt kernel: [9404337.387287] FW reject: IN=ppp0 OUT= MAC= SRC=117.204.35.104 DST=xx.xx.xx.xx LEN=52 TOS=0x00 PREC=0x00 TTL=112 ID=1859 DF PROTO=TCP SPT=11262 DPT=21 WINDOW=65535 RES=0x00 SYN URGP=0
Apr 10 09:35:52 greenblatt kernel: [9404337.748446] FW reject: IN=ppp0 OUT= MAC= SRC=117.204.35.104 DST=xx.xx.xx.xx LEN=52 TOS=0x00 PREC=0x00 TTL=112 ID=1964 DF PROTO=TCP SPT=11267 DPT=21 WINDOW=65535 RES=0x00 SYN URGP=0
All firewalled safely, there is no ftp service configured.

A new attack?

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2015-04-08 Audio in websdr without java 1 week ago
I noticed some of the websdr online receivers were only offering html5 audio and html5 waterfall display. The waterfall display started working ok in recent firefox for linux but the audio always remained silent. Until I checked and checked again and the solution seemed to be 'check audio settings'. And I found the 'AudioCallbackDriver' from application 'CubebUtils' with a firefox icon in pavucontrol (PulseAudio volume control) which was set to output level 0 (silence). Changing that to a more reasonable volume helped a lot!

Now I don't need java applets in my browser to use the different websdr servers.

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2015-04-04 Amateur radio away from buildings 1 week ago
I had this Friday al to myself and decided to try some amateur radio out in the field using the new longwire antenna I recently bought.

I was pondering taking the recumbent bicycle first but the outside temperature in the morning of 5 ⁰C made me chose the car which would give me a warmer shelter to sit in. I drove to a nearby outside recreation area (De Leyen near Groenekan) and there I was shielded from the wind so I could sit outside. I decided to set up the radio on a park bench near a tree.

During the setup someone did ask me what I was doing and I explained about amateur radio. That person asked whether that wasn't normally done from a room in the attic and I explained that being away from radio noise source would be an interesting experiment. This explanation seemed to answer that person's interest.

I used some nylon rope to hang one end of my longwire antenna up in a tree and anchor the other end at the base of another tree. A filled plastic water bottle makes a nice smooth weight to throw a rope over a high branch of a tree. The antenna was sloped downwards in southern direction.
Read the rest of Amateur radio away from buildings

2015-04-01 New country for me in amateur radio: Afghanistan 2 weeks ago
Spotting T6T on pskreporter I saw T6T active on 10 meter PSK31 this afternoon, fading in and out. And quite popular with other stations, Afghanistan is a rare country to see active on amateur radio. But one go he saw my reply and we managed to have a short contact. Right after the contact he faded away completely again!

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2015-03-30 Don't try to use my system to attack another 2 weeks ago
A growing part of the 'Internet background noise' that my server is receiving seems to be tcp syn packets from faked source addresses. I mentioned this before in Am I part of an interesting attack?. Looking at the traffic with p0f shows that the source addresses (and ports!) are constant but the operating system and the time to live changes so these probably come from multiple hijacked systems:
174.128.225.126:57282 - Windows XP/2000 (RFC1323+, w+, tstamp-) [GENERIC]
  Signature: [8192:93:1:52:M1460,N,W8,N,N,S:.:Windows:?]
  -> xx.xx.xx.xx:80 (distance 35, link: ethernet/modem)
174.128.225.126:57282 - UNKNOWN [8192:87:1:52:M1460,N,W8,N,N,S:.:?:?]
  -> xx.xx.xx.xx:80 (link: ethernet/modem)
174.128.225.126:57282 - UNKNOWN [8192:85:1:52:M1460,N,W8,N,N,S:.:?:?]
  -> xx.xx.xx.xx:80 (link: ethernet/modem)
174.128.225.126:57282 - Windows XP/2000 (RFC1323+, w+, tstamp-) [GENERIC]
  Signature: [8192:98:1:52:M1460,N,W8,N,N,S:.:Windows:?]
  -> xx.xx.xx.xx:80 (distance 30, link: ethernet/modem)
174.128.225.126:57282 - UNKNOWN [8192:81:1:52:M1460,N,W8,N,N,S:.:?:?]
  -> xx.xx.xx.xx:80 (link: ethernet/modem)
174.128.225.126:57282 - Windows XP/2000 (RFC1323+, w+, tstamp-) [GENERIC]
  Signature: [8192:116:1:52:M1460,N,W8,N,N,S:.:Windows:?]
  -> xx.xx.xx.xx:80 (distance 12, link: ethernet/modem)
174.128.225.126:57282 - Windows XP/2000 (RFC1323+, w+, tstamp-) [GENERIC]
  Signature: [8192:102:1:52:M1460,N,W8,N,N,S:.:Windows:?]
  -> xx.xx.xx.xx:80 (distance 26, link: ethernet/modem)
Read the rest of Don't try to use my system to attack another

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2015-03-29 RF into a networkcard crashing a computer 2 weeks ago
I recently had the main PC that is connected to the amateur radio crash regularly when I was active on the 20 meter amateur band (14.000 - 14.250 MHz) which is at the moment the most interesting band for me. This PC is thompson, a Dell OptiPlex 745. This led to serious annoyances as cqrlog, the logging program I use depends on MySQL which handles crashes badly. I got very good at recovering the database and reinstalling cqrlog.

I thought it was time for a new PC but in the mean time I was dismantling some other old PC's and found an Intel E-1000 gigabit network card. Since the network switch thompson is connected to always showed strange activity after the PC had crashed I wondered if the on-board network card of the PC was the main cause. So I disabled the on-board network interface and installed the Intel E-1000 card.

So far the PC hasn't crashed since installing the card. I have been active on the radio two evenings since the installation.

Update 2015-04-06: A few crashes have happened since but not as many as happened when I got really annoyed.

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2015-03-29 Publishing my QSL policy 2 weeks ago
I was reading the Electron magazine of the Veron radio club and it had a mention of rising costs of QSL forwarding. The article asked radio amateurs to clearly publish their QSL policy so other amateurs don't send cards when they don't want them.

My own policy is that I like receiving QSL cards so I'll send them out myself to amateurs that appreciate them. But a confirmation via eQSL is also good. In digimodes eQSL is quite popular so I already gathered a collection of incoming eQSL cards.

So I updated the PD4KH amateur radio and PD4KH profile on qrz.com with my QSL policy. I suggest others do this too.

2015-03-27 Overly interested Amazon EC2 nodes 3 weeks ago
On Camp Wireless and The Virtual Bookcase I see the following pattern in the access logs:
2620:108:700f::36bc:aade - - [27/Mar/2015:13:27:11 +0100] "GET / HTTP/1.1" 302 298 "-" "curl/7.36.0"
2406:da00:ff00::36e2:d963 - - [27/Mar/2015:13:27:38 +0100] "GET / HTTP/1.1" 302 298 "-" "curl/7.36.0"
Constant requests, 2 or 3 per minute from Amazon EC2 IPv6 addresses just requesting the / using curl. Over the day I now see 1334 unique addresses with at most 5 requests from one url.

The same pattern as described in Stange stream of HTTP GET requests in apache logs, from amazon ec2 instances - Server Fault with no real answer to the why.

It's not a problematic amount of traffic, I'd just like to understand what is happenning!

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2015-03-25 New country for me in amateur radio: Qatar 3 weeks ago
eQSL confirming contact with A71AE
Confirmation of contact with A71AE
Last evening I saw A71AE active on 20 meter PSK63. After he worked a number of other station I answered his CQ and we had a short but good contact. And I already have it confirmed via eQSL.

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2015-03-24 (The camb-hams will do it again: they will be active on satellites and other propagation modes, this ...) 3 weeks ago
Google+Koos van den Hout : The camb-hams will do it again: they will be active on satellites and other propagation modes, this year from May 15-21 2015 from locator IO76EJ island of Mull.
2015-03-24 New antenna for outdoor plans 3 weeks ago
The main thing I shopped for when I visited the Landelijke Radio Vlooienmarkt was a simple antenna for 10/20/40 to use while camping. To get the most out of not too much space I decided to mainly look for an endfed antenna. This is a simple wire with a transformer at the end. Not the perfect antenna, but a compromise between size, performance and ease of deployment.

LW-10 antenna Browsing the offerings I found an LW-10 antenna which covers 40 to 6 meter (7 to 50 MHz) and was sold to me by the nice people of www.cbradio.co.uk. I wanted to test it at home and last evening I had the chance.
Read the rest of New antenna for outdoor plans

2015-03-23 Unexpected facilities at CPAN 3 weeks ago
From the spambox:
How are you doing today, I am miracle 24 yearls old girl, i saw your profile today at googlesearch cpan.cse.msu.edu - i like it, then i decided to contact you for going into deep rellastionship between me and you
I know CPAN is a lot, but I never saw it as a dating site.

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2015-03-23 Meer mobiel geschikte pagina's 3 weeks ago
Recent gaf google me allemaal meldingen dat mijn websites niet goed zouden werken op mobiele apparaten (telefoons, tablets). Het gevolg is dan dat google bij zoeken vanaf mobiele apparaten de sites ook minder aantrekkelijk zou vinden.

Mijn eerste gedachte was dat dat me niet zoveel uitmaakt omdat de gemiddelde bezoeker van mijn sites wel vanaf een desktop of laptop PC komt. Maar aan de andere kant doe ik simpele dingen ook vaker vanaf een tablet tegenwoordig en zag in ieder geval mijn homepage er daarop niet uit. En sites als Camp Wireless hebben zeker een mobiel publiek.

Alleen liep mijn kennis wat achter. De laatste keer dat ik serieus keek naar sites voor mobiele devices was toen WAP de oplossing was. Dus maar eens de informatiepagina's gelezen die google aangaf, over viewport gebruik en media queries voor CSS.

Voor de meeste sites is het een simpele CSS aanpassing om een en ander mogelijk te maken. Onder een bepaalde breedte hebben de 2 kolommen die ik vaak gebruik niet zoveel zin. Dus met de media query dit opgelost. Nu langzaam maar zeker sites aanpassen. En van sommige sites moeten echt dingen aangepast worden (juist camp-wireless..) omdat daar nog deels verouderde technieken gebruikt worden die aanpassingen voor mobiel moeilijk maken.

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2015-03-22 The Heard Island DXpedition book 3 weeks ago
First I have to describe to 'other' visitors of my pages what a DXpedition is: operating radio from a remote location which is on the wish-list of many radio amateurs who want to make contacts with as much countries/locations as possible. Radio amateurs will visit such a place and set up antennas and radios to make those contacts possible.

I just finished reading the VK0IR DXpedition book. It's a great description of the Heard Island DXpedition in 1997. Just 18 years ago, but a lot has changed. Supporting a major amateur radio event via the Internet/World wide web was a new thing back then. Nowadays, not doing that would be unthinkable.

And, the Heard Island 2015 DXpedition is being planned! I usually avoid making contact with DXpeditions because it's just trying to get through a wall of radio amateurs trying to make that contact (what radio amateurs call a "pile-up") but it can be done, so I may try to get this one.

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2015-03-21 (In het Autotron is nog wel iets te zien over auto's. Maar ik ben er vandaag natuurlijk voor de landelijke...) 3 weeks ago
Google+Koos van den Hout : In het Autotron is nog wel iets te zien over auto's. Maar ik ben er vandaag natuurlijk voor de landelijke radio vlooienmarkt.
2015-03-20 Morgen Landelijke Radio Vlooienmarkt 4 weeks ago
Morgen is het tijd voor de 40e Landelijke Radio Vlooienmarkt in het Autotron in Rosmalen. Ik ga er weer van harte heen!

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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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Koos van den Hout, reachable as koos+website@idefix.net. PGP encrypted e-mail preferred.

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