I’ve written before about how to access SNMP agents (or other TCP or UDP services) in a network when you only have SSH access. Running a SSH VPN and then running IP Masquerading (NAT) in the remote end is the solution for me so far. Here is how it is done.
Continue reading SSH VPN with IP Masquerading (NAT)
I’d like to recommend an Android App for seeing the Sun’s path in Augmented Reality (AR): Sun Surveyor. There is also Sun Seeker for iPhone/iOS, which I haven’t tried since I don’t have an iPhone.
We’re out looking for a house to buy, and for me getting the afternoon and evening sun on the terrace during summer is so incredibly important. This way, I don’t have to take the real-estate agent’s word for where the sun goes down in the summer and whether the trees will create shade on the terrace. I can check it myself. Über-cool!
The graphics are laid out on top of my phone’s camera image, so given the image to the right I can see that on July 9th (almost mid-summer) the sun clears the wall just after 7pm before it goes down at 8:52pm. A little before that it will be obstructed by the wall in the background though. All visible on one screen.
I guess this could be handy for photographers too, but for buying a house this is indispensable. What surprises me is how all the real-estate agents that I’ve shown it to were blown away by it (or so they pretended :-)) but had never seen or heard about something like that before.
Have fun with it!
Honestly, I don’t understand how somebody can prefer PDF to HTML for on-screen viewing. Really? That is possible? If you’re one of them, can you help me understand?
Continue reading Oh, god I hate PDF for on-screen viewing
Here in Denmark, we’ve just had an election, and the previous government has been replaced.
A newspaper article [lang=”da”] looks back at what people liked and disliked about what the previous government did.
I have trouble believing, much less understanding, that 68% consider increased surveillance to have had a positive effect for Denmark, 16% believe the effect to be neutral and 16% believe it to be negative.
Wow. The people who believe that our society is better off when the government monitors us more out numbers people like me 4 to 1? Yikes. Has nobody read 1984 or seen Das Leben der Anderen? Doesn’t anybody remember DDR or the Soviet Union? Perhaps China will open source the great firewall too, so we can install it here!
I’m a little sad today about this.
Edit on 2011-10-20. Oh no, it keeps getting worse [lang=”da”].
Really cool list of 34 Cleverly Designed Inventions. I especially liked the USB connector, the stair case drawers, and the crawling lamp on the wall.
Thanks to the Userfocus Usability Newsletter for the link. The site also has lovely 32 Pictures To Help You Appreciate The Awesomeness Of Nature but I better let you go now :-).
A Danish Minister approves an ad-agency to pose as real users and stuff a forum with bogus posts to kick-start it. I’m appalled, surprised at my own ignorance and worried about the lack of credibility of even government-funded sites. Continue reading How much do we trust posts on website forums?
Why doesn’t every programming language have “Natural Sorting” built in, out of the box? Natural sorting is the way humans sort, where number substrings are sorted numerically, everything else alphabetically:
|Sorted “Asciibetically” (normal computer sort)
||Sorted “Naturally” (what humans prefer)
Notice how 10 comes before 2 in asciibetical “normal computer sorting” ? Haven’t we all seen user interfaces that like that? Its just plain wrong.
Dave Koelle’s Alphanum Algorithm sorts naturally, but instead of analyzing each array element O(log(N)) times, I present a modified Perl version that allows for Schwartzian transforms, yielding huge performance improvements.
Continue reading Natural Sort
Well, now you can! I’ve developed a pair of tools for that allow this when used in concert. Both are Open Source, of course.
Continue reading Refresh your browser automatically during web development
Here is an example of the problem we need to solve: We have SSH access to a network, but want to access an SNMP agent in that network from a local client. We use SNMP here in this example, but it could be any other protocol that uses UDP, such as DNS or TFTP.
We’ll forward the SNMP traffic in a TCP port like this, with “socat” doing the UDP-in-TCP tunneling:
Continue reading Forwarding SNMP ports over SSH using socat