Friday, March 19, 2010


DoS. Denial of Service. A DoS is usually used to stop people from accessing a network by flooding it with all sorts of crap. One way someone might DoS your server is by repeatedly pinging your server with large ICMP packets. Another form is apparently called smurfing... It's the same thing as repeatedly pinging except you spoof the victim I.P. and then pinging the broadcast address so every machine on the network is screwed. The last one is a SYN Flood where a server is sent a barrage of SYN packets requesting to start communication and won't communicate with any other requests until it can deal with the current ones. There's also DDoS which is just a DoS attack from multiple machines attacking multiple targets. So that's it. Gonna go cut my fingers on some Legos.

Thursday, March 18, 2010

Lego WeDo

I took some times yesterday do play around with it. A problem I had yesterday and the day I first got the kit was I could not start the WeDo software without something in each USB port. Kevin experienced the same problem. He said he couldn't get the software working until that day when we met. The strange thing is right now I tried it out and the software worked fine. Usually the software starts, there's a beep and it goes to the main menu.

My brother has his own XO and will be keeping his own blog. We're both running the same OS, same firmware, both freshly installed and yet we seem to have different problems. One thing I want to know is if you don't want anyone else seeing this stuff so we should make everything private or if you don't care.

Wednesday, March 17, 2010

User Accounts and WeDo

User accounts. Don't use password as your password. That is all.

Ok now for the real stuffs. RADIUS. A while back we were considering having any wireless device authenticate itself with a username and password and be presented with a captive portal. That pretty much went kaput since it wasn't really necessary, and WPA-2 suits us fine. Anyway RADIUS is basically a way of authenticating users and giving them restricted access to resources. Kerberos is an authentication protocol that can be used on top of RADIUS. I mention Kerberos since it is used for authentication and everyone has heard of it even if they don't know what it means. Kerberos is also meant for a regular corporate network versus RADIUS which is used by ISPs to allow authentication of their users anywhere.

WeDo post in a bit...