Microsoft Produkt Aktivierungshotline

Die Windows-Aktivierungshotline in Deutschland kann man unter bis zu vier verschiedenen Nummern erreichen. Dieses Rufnummernchaos ist deshalb so problematisch, weil man mal die eine und mal die andere Rufnummer in diversen Forenbeiträgen findet. Im Endeffekt ist es aber immer der gleiche Sprachcomputer (zumindest sind die Funktionen immer die gleichen) bei dem man landet.

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Asterisk und Telekom ALL-IP Anschluss – das Problem mit alaw

Es ist wieder einmal so eine Erfahrung in der praktischen Informatik, die man eigentlich nicht hätte machen brauchen. Bei einem Telekomanschluss (ALL-IP über sip.t-online.de) kann man z. B. beim Anrufen der Rufnummer 06206 1808-130 (das ist Fax-Rufnummer des Amtsgerichts Lampertheim) plötzlich vor dem Problem stehen, daß der Telekom-Server brüsk die Meinung

SIP/2.0 500 Server Internal Error

vertritt. Das macht im ersten Moment erst einmal sprachlos. Die SIP-Registrierung des Anschlusses bei der Telekom zuvor klappte ohne Probleme. Das Anwählen von vielen anderen Rufnummern macht auch keine Probleme.

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No Jumplist in “pinned” PUTTY?

There are numerous bugs out there, which may cause Putty not to show the so-called “jump list” (these are the “recent” items on a pinned icon on the task bar) under Windows 10. Amongst them are:

However, you should also check that this feature is enabled in Windows 10 in general (which wasn’t the case with mine). Details on that you may find at https://www.raymond.cc/blog/clear-and-disable-jump-lists-in-windows-7/

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Issues with PowerDNS on Debian with Plesk Installed

When perfoming an “apt-get upgrade” on your machine, and you have both PowerDNS and Plesk installed, you may encounter a cumbersome situation:

Plesk automatically tries to reactivate bind9. However, bind9 and PowerDNS may be listening on the same UDP port (53). The best countermeasure against that is

sudo service bind9 stop
sudo service bind9 disable

Additionally, Debian and PowerDNS aren’t really friends. The problem mentioned at https://github.com/PowerDNS/pdns/issues/4219 which is resolved with https://github.com/PowerDNS/pdns/issues/4219#issuecomment-234250149 still isn’t handled out of the box. So, additionally, you should comment the line

RestrictAddressFamilies=AF_UNIX AF_INET AF_INET6

in /lib/systemd/system/pdns.service. This adjustment may get overwritten with each upgrade that you perform. Afterwards do a

sudo systemctl daemon-reload
sudo service pdns restart

If you forget to comment the line mentioned above, you may end up with the strange error message:

pdns.service: Failed at step ADDRESS_FAMILIES spawning /usr/sbin/pdns_server: Invalid argument

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Access Denied When Copying Files From Network (UAC / EnableLinkedConnections)

I guess you experienced this already as often as I did: You are getting an “access denied” error message from a tool such as Total Commander, when you try to copy a file from a (SMB) network share over to a location, which requires you to become administrator via the UAC prompt:

User Account Control in Windows 10

By Source, Fair use, Link

It simply may be nerve-wracking. The added level of security is debatable. Root cause for this is that the network drive mappings are not available when you are in UAC mode.

Here is the easy solution to fix it – Windows 10 permits to disable this feature via a registry patch, which simply is like this:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System]

"EnableLinkedConnections"=dword:00000001

Restart your machine afterwards, and the network drive mappings are available to you, even if you have switched to elevated rights through UAC.

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Amazon Machine Learning – Take Two

Since my last post analyzing Amazon Machine Learning (AML), I got quite some feedback from friends and colleagues about my findings. One of them included criticism about the setup of my test especially on the formula I used. As I consider this discussion valuable, with this post I would like to re-run my analysis with a slightly different approach to see if that changes anything significantly.

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Amazon Machine Learning – Does it really learn?

The term “Machine Learning” today has to be in everybody’s mouth. No software company may show up on the market without having a product which does not have at least a tag attached labeled with this buzzword. One of the most famous cases is Amazon, which – for example – promotes its product called “Amazon Machine Learning”. They claim that

The service uses powerful algorithms to create ML models by finding patterns in your existing data. Then, Amazon Machine Learning uses these models to process new data and generate predictions for your application.

Source: https://aws.amazon.com/aml/?nc1=h_ls

But how far does this “learning” go already? If you listen to the news, you could assume that in the future, learning is no longer a task for humans anymore, but soon will only be done by machines. Let’s see how far real life really is. Continue reading ‘Amazon Machine Learning – Does it really learn?’ »

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Safe Mode for Samsung Galaxy Tab 2 10.1 (GT-P5100) w/ Android 4.0.4

By chance I got hold of a Samsung Galaxy Tab 2 10.1 (GT-P5100) running a quite ancient Android 4.0.4. It was infected by the GVU / BKA Trojan Horse. The usual tricks to bring the device into Safe Mode did not work, Continue reading ‘Safe Mode for Samsung Galaxy Tab 2 10.1 (GT-P5100) w/ Android 4.0.4’ »

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Onkyo TX-SR608 und zu geringe Spannung

Manche Sachen dauern Jahre, bis man es überhaupt geschafft hat, den Grund dafür zu finden. So geschehen bei meiner Stereoanlage, die ich durch einen Onkyo TX-SR608 fast ausschließlich per HDMI betreibe. Symptomatisch äußerste sich diese zunächst sehr merkwürdig: Sobald ich auf eine der Tasten drückte, um das Overlay On-Screen-Display (OSD) zu starten (z. B. Video- oder Audio-Taste), wurde das Bild plötzlich “schwarz” und der blaue Bildschirm wurde angezeigt, als ob ein Signalfehler vorläge. Allerdings kam das OSD auch dann nicht hoch, wenn ich einen Quelleingang selektiert hatte, an dem gar kein Gerät angeschlossen war, d.h. so oder so nur der blaue Bildschirm angezeigt wird. Continue reading ‘Onkyo TX-SR608 und zu geringe Spannung’ »

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