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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.

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2015-04-26 Tried APRS on my way back from Apeldoorn 5 hours ago
After I visited the Interessedag Amateursatellieten 2015 in Apeldoorn I decided to give APRS a try again.
aprs data 2015-04-25 PD4KH-7 data from aprs.fi
All received APRS data from PD4KH-7 on the way back from Apeldoorn
I tried APRS over a year ago and it works with APRSdroid on my tablet and the vox function of my radio.

On my drive back I wanted to try this again. Outside antenna on the window of the car, radio and tablet in a bag so the vox would work. I heard the familiair buzzsaw noises from the bag from time to time during the drive but the end result is one whole position report seen on the APRS network.

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2015-04-19 () 6 days ago
Google+Koos van den Hout : At least here in the Netherlands there is a difference whether the button was pushed or not.
But a different rant is detection loops that will make the button light up making me think I don't have to push the button and after a number of seconds the button light goes out again.
2015-04-14 (De ontwikkeling is niet nieuw maar het is goed om het zo leesbaar te zien) 1 week 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.) 1 week 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 1 week 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...) 1 week 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...) 1 week 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...) 1 week 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 1 week 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 1 week 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...) 2 weeks 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 2 weeks 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) 2 weeks ago
Google+Koos van den Hout : Italian engineering at its finest
2015-04-10 No I gave up on ftp years ago 2 weeks 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 2 weeks 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 3 weeks 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 3 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 3 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 3 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 3 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.

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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 54.163.168.15 in United States

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

PGP key DSS/1024 2C66 3B5D F0D7 C263 local copy PGP key DSS/1024 2C66 3B5D F0D7 C263 via keyservers 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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