At the beginning of this week my server became a target for a DDoS attack which eventually caused a massive overload. Therefore all websites on the machine where temporary not avaible any longer. The goal of this attack was obviously an attempt to exploit the pingback vulnerabilty of WordPress which already had been reported in March.
Update 2014-08-07: In fact it’s more likely that a problem in PHP in the context of XML had been exploited, also see this post about the details.
Since a while Google Maps also offers a 3D view in modern browsers which support WebGL – similar to the way it is possible with the separate application „Google Earth“. For this you just have to click the “Earth” symbol in the lower left corner of the map view:
If you are not sure if your browser generally supports WebGL you may first try my little example for WebGL.
The Multicolumn Category Widget had been extended by an additional option which allows to display the number of posts behind the category names.
Recently I addressed the topic „WebSockets“ and as an exercise I created a little experiment: A simple chat.
If you like to, you may check this out at https://arnowelzel.de/tools/chat/. A requirement for this is a decent browser with support for SNI and WebSockets.
The widget to display categories in WordPress lists categories only in one column (as of version 3.8.1). However in many cases there would be enough room to split the list into two or more columns.
For this purpose I’ve created my first plugin for WordPress – “Multicolumn Category Widget”, a widget to display the top level categories in multiple columns.