News archive August 2019 - Koos van den Hout

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2019-08-26 3000 items on my homepage and counting 9 months ago
Over 3000 items I was just wondering about the number of newsitems on my homepage and did a check. An interesting value popped up: 3000.

Yes, a round 3000 items since I started writing more than 20 years ago (or rather: 7456 days ago) : I've created a virtual bookcase with an overview of books I like/read.

Graphic created with Retro Wave.

Hat tip to Wil Wheaton, who mentions 6584 days - Wil Wheaton dot net

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2019-08-21 Comparing yfktest and tlf for linux-based amateur radio contesting 9 months ago
Episode 295 of Linux in the Ham Shack is about the TLF Contest Logger. I wrote to Linux in the Ham Shack about my experiences with both programs. In 2017 I participated in the IARU-HF contest using yfktest and in 2019 I participated in the IARU-HF contest using TLF.
My opionion about both is clearly formed by my style of contesting. Phone contesting is rare for me, and I am a very casual contester. I operate in search and pounce mode, where I search for other stations calling CQ.

My experiences:

Both are textmode programs, which try to mimic DOS-based contest programs. No dragging around windows, you'll have to deal with how the makers decided to set up the screen. Also, on a graphical system, try to find the biggest and baddest monospace font to fill as much of your screen with the contesting software as possible.

The role of contest logging software is making it easier to log contacts in a contest. It does this by automating a lot of the tasks in a CW contest, by keeping the log and showing the outgoing serial number (if needed). It's a plus when contest logger can keep the live claimed score in the contest and when it can connect to a DX-cluster and show possible contacts being spotted. Both packages can do the basic contesting and scorekeeping, tlf is the only one that supports DX clusters

yfktest is written in Perl, tlf in C. For adding a new contest to yfktest you will soon have to do some programming in perl to handle the score calculations. For a new contest in tlf you may have to do some C programming.

yfktest has no cluster support, but tlf does have it. This is a huge difference to me. With tlf I could open a cluster window showing me where new calls were spotted and on what frequencies recent contacts were, so I could hunt for interesting new calls and multipliers

Specific to the IARU-HF contest and my use of the packages: yfktest supports the IARU-HF contest out of the box, so it gets the multipliers right. When I did the IARU-HF contest with tlf, I asked about it on the list and someone shared a configuration right at the beginning of the contest so it worked. Mostly: It did not count the multipliers correctly, so I had no idea of the claimed score during the contest.

Both are open source and welcome any additions. Looking at the commit history tlf is somewhat more active recently.

If you want to really add a contest to either of them you'll probably have to start thinking about that months before the contest and take your time to debug your rules/scoring configuration if you want good scoring during the contest.

I will probably stick with tlf because of the cluster support.
Linux in the Ham Shack took my shallow dive a lot further and went into a deep dive with installing, configuring and running TLF. Awesome episode, I really enjoyed it!

Links to all the stuff: Show Notes #295: TLF Contest Logger Deep Dive - Linux in the Ham Shack
yfktest linux based ham radio contest logger, TLF, a linux based ham radio contest logger.

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2019-08-13 Decompiling zonefiles 9 months ago
The authoritive nameserver on the homeserver 2017 is using bind9 version 9.10.3 (from Devuan packages). I wanted to look up something in a secondary zonefile and noticed it was a binary file.

Using 'file' to determine what to do next wasn't much help:
$ file secondary.domain-zone
secondary.domain-zone: data
But a search found an explanation at Reading a binary zone file from Bind - The Linux Page. With named-compilezone a zonefile can be 'uncompiled' to a readable file.
$ /usr/sbin/named-compilezone -f raw -F text -o /tmp/secondary.domain-zone.txt secondary.domain secondary.domain-zone
zone secondary.domain/IN: loaded serial 2018122523
dump zone to /tmp/secondary.domain-zone.txt...done
OK
$ file /tmp/secondary.domain-zone.txt
/tmp/secondary.domain-zone.txt: ASCII text
Which is a readable zonefile.

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2019-08-05 Time for a new plot of the number of radio contacts 9 months ago
QSO count plot up to July 2019 Time for a new plot of the number of radio contacts. Months with contest(s) stand out again as they elevate the number of contacts. In July 2019 I participated in the DL-DX RTTY Contest 2019 and the IARU-HF Championship 2019. That last one has added a few countries to my list of countries confirmed in phone modes.

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2019-08-01 IPv6 growing up: ssh attempts to an inside machine 10 months ago
IPv6 is growing up: I saw an ssh attempt to an inside machine, reachable only via IPv6. The source was a Chinese IPv6 address which had not tried anything on any other public service.
Jul 30 18:39:02 ritchie sshd[27454]: Bad protocol version identification '\026\003\001' from 240e:d9:d800:200::212 port 44926

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

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