Software development, photography, jokes, ....

Sites by me

tas-logoTransportation Administration System
snoezelkussen-logo-kleinstSnoezelen Pillows for Dementia
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Laat uw hond het jaarlijkse vuurwerk overwinnen
Betuweroute en Kunst
logo 50x50Hey Vos! Je eigen emailadres?
Kunst in huis? Nicole Karrèr maakt echt bijzonder mooie dingen
nettylogo2Kunst in huis? Netty Franssen maakt ook bijzonder mooie dingen
Professionele opvang bij Gastouderbureau
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De Zaak Loont
Zutphense Bomenstichting

Hosting Favorites

ANU Internet Services
XelMedia .internet services


Google Translate
jQuery UI
YourHead Stacks API
Favicon Generator. For real.
Check HTTPS problems



Marc's Place


Wireless network connections in hotels and on the road

If you ever try to be smart and add some hi-speed DNS servers to your WiFi DNS settings ... don't. I thought I was and the last months I have been wondering why I couldn't connect to wireless LANs in hotels and trains - and they didn't know either.

Today, at Hotel BB (good hotel btw) they put me in contact with their WiFi-provider and after a going through every detail, we found the reason: my manual DNS entries. Why did I put them there? Well, at home I sometimes use NameBench to find the best DNS-servers. And since Google's DNS servers are mostly the fastest, I thought it a good thing to add those two ( and permanently to the DNS of my WiFi connection! Which then blocked and confused the routers in the hotels I was staying or the trains on which I travelled. And I thought what a shitty stuf do these guys have... hum hum ;-)

So.... I created a separate location for when I am mobile and I called it Mobile (DHCP). I leave it totally empty so routers in hotels and trains can discuss with my Macbook Pro what is the best connection and which DNS-servers to use. Here's how in images:

and click Apply when the Mac asks you to!

Now, whenever I go out and take my MacBook Pro with me, I first choose this Mobile (DHCP) location so whatever WiFi-router I connect to, I have a good chance for internet access.

Connect your Mac to the Tor Network

I created a page how to 'Connect to the Tor Network', which describes the steps to connect your whole Mac, not just clients with their own proxy settings, to the Tor Network. It's really simple and not complicated at all.

Happy free and anonymous browsing!


Multihouse Reünie in Grand Hotel ter Duin, Burgh-Haamstede

In het weekeinde van 22 en 23 september 2012 was er een grootschalige reünie georganiseerd voor en door oud-Multihousers. Grote sponsors van dit idee zijn Inventive en Grand Hotel ter Duin geweest. Het hotel, de bar en het restaurant vond ik echt super! We hebben er heerlijk gegeten, gedronken en geslapen.

Alles over de reünie is te lezen op de website van Inventive. Hieronder vindt je een overzicht van de meegebrachte memorabilia en een hele kleine impressie van het hotel en de reünie - ik heb veel gekletst en weinig foto's gemaakt.

Als je op de memorabilia klikt, wordt er een 12MB grote foto geladen waarop alles wat beter te zien is. Als de foto dan geladen is, kan je met de meeste browsers er nog eens op klikken en dan wordt de foto vergroot tot de werkelijke grootte. Dan kan je alles nóg beter zien.


iperf3: a Network Bandwidth Tester

I was investigating my WiFi access points for improvement and while browsing the web for ideas I came across iperf3. Simple and effective, iperf3 is a tool to measure network bandwidth (read more about it ...)
To simplify installation, I created a MacOS X (Intel) installer package for iperf3 so you do not need to compile yourself.
(download iperf3.pkg)
An Universal Binary Installer Package for MacOS X can be found on NCSA Illinois, although that is iperf2.
(download iperf.pkg)

Simple 1-2-3 Network test:
Install iperf3 on a Mac where you start it as a server: open Terminal and enter the following:
iperf3 -s
Then install it on another Mac and run it as a client: open Terminal and enter:
iperf3 -c -t 60 -P 2
where you must replace this IP-address with yours where iperf3 runs as a server on.

Wait a minute (-t 60) and the results are presented as follows:
Connecting to host, port 5201
[ 4] local port 65334 connected to port 5201
[ 5] local port 65335 connected to port 5201
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-60.00 sec 342 MBytes 47.8 Mbits/sec
[ 4] 0.00-60.00 sec 342 MBytes 47.8 Mbits/sec
[ 5] 0.00-60.00 sec 321 MBytes 44.9 Mbits/sec
[ 5] 0.00-60.00 sec 321 MBytes 44.9 Mbits/sec
Total sent
[SUM] 0.00-60.00 sec 663 MBytes 92.7 Mbits/sec
Total received
[SUM] 0.00-60.00 sec 663 MBytes 92.7 Mbits/sec

iperf Done.

To stop the server, press CTRL-C.
Enter iperf3 --help  for all possible options.

This suite is also available on iOS: WiFi Bench.
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