Category Archives: sdu

VPN forbindelse til SDU i Ubuntu

Det er muligt at forbinde til SDU’s netværk i Ubuntu via VPN. Denne guide er skrevet med henblik pÃ¥ brug af Ubuntu 8.04 og Gnome.

Der er nogle generelle oplysninger pÃ¥ SDU’s hjemmeside inkl. en installationsguide og en link til en Cisco klient der kan downloades. Det ser dog ikke rigtig ud til at der er nogen klient at downloade, men klienten skal heller ikke bruges her. I installationsguiden stÃ¥r der at man skal bruge et gruppenavn og gruppepassword, og at det kan fÃ¥es ved henvendelse i Helpdesken. Jeg har modtaget mit direkte fra mit institut, sÃ¥ jeg har ikke prøvet helpdesken, men man skal bruge begge dele for at guiden virker.

I Ubuntu skal man have installeret pakkerne “network-manager-vpnc” og “vpnc”.
sudo apt-get install vpnc network-manager-vpnc
Derefter er det nødvendig at genstarte network-manager og den nemmeste løsning er simpelthen at genstarte computeren.

Nu kan man konfigurere VPN forbindelsen ved at venstre-klikke pÃ¥ NetworkManager ikonet i statusbaren og vælge “VPN-forbindelse” og “konfigurer VPN”.

  1. Vælg “Tilføj” og følg skærmene igennem.
  2. Vælg Cisco VPN-klient.
  3. Udfyld “Required” pÃ¥ det første faneblad. Mit gruppenavn er tekvpn, men det er afhængigt af hvilket fakultet man er tilknyttet.
  4. Under “Optional” udfyld dit brugernavn (inkl. domæne pÃ¥ formen: “domæne\brugernavn”) og vælg “Brug domæne til brugerverification”. Mit domæne er “tek” men det er naturligvis afhændigt af fakultetstilknytning.
  5. Sidst men ikke mindst skal man vælge “Enable weak single DES encryption”.

SÃ¥ er det muligt at logge ind ved igen at venste-klikke pÃ¥ NetworkManager ikonet i statusbaren og vælge “VPN-forbindelse” og klikke pÃ¥ den nyoprettede VPN forbindelse og udfylde gruppepasswordet og det almindelige password man bruger til at logge pÃ¥ domænet.

Det er OK at bemærke det ironiske i at man skal sætte flueben i “Enable weak single DES encryption” nÃ¥r der pÃ¥ SDU’s oplysningsside stÃ¥r “Benytter 3DES kryptering (168bit) og betragtes som den mest sikre protokol”…

Clever little game, blog update

So, it’s been really long since I last put a new post up, and I’m going to try to remedy that in the near future, after my exams. I have a couple of post in queue right now:

  • Part 2 of the Sokoban robot post, detailing the construction of a Sokoban game parser, an A* routine for finding paths written in Java, and a translator routine for the route, so the robot can follow it.
  • A new AI post about implementing a Neural Network in Java. Used for playing LUDO, but probably general enough to be used for other things.

The post about using Sunbird and a SE phone generated a lot of traffic, so I’m going to try to follow up on that to, since people apparently like those kind of cookbooks. So more Ubuntu experiences coming up as I get my notes sorted out.

I’m going to start on my master thesis in a few weeks, and I’m going to use this blog as a sort of project journal. So hopefully I’ll have lots of stuff to post during the next 12 months :-)  This also means that I’m about done with the approximately one million projects we have undertaken during the years, so I’m going to try to sort through my archives, and see if there’s something that worth making publicly available, and commenting a bit on that.

Finally I just wanted to point to a small very intriguing game Cursor*10, which was also featured on digg a little while ago. Just goes to show, that as all computer gamers know, game play can be so much more important that graphics. I mean… it’s even in mono-chrome. Fantastic…

And lastly, the blogroll has been updated, since Lars has moved his blog, now that he was finally pressured into handing in his thesis. Congrats, Lars.