When a business touts a benefit, like having free wifi when you get your oil changed, it makes me happy. I can sit and geek on the net, check email, etc, do something productiive when I'd normally just have to sit. This was a big thing the dealership we purchased our car from kept telling us.
When they offered me oil changes for the car for life, for $299, I did the math, and thought, heck... why not? So the first time I came to get the oil changed on the car, I was happy to connect to their network and have something to do while I waited.
But it did not work. I could get an IP address, but could do nothing more. I unplugged their router, rebooted thier cable modem... to no avail. I complained to the service department, and they said they'd get it corrected.
Today, our second oil change same issue. In fact, another user was griping about the same thing. So I finally got frustrated and determined with the level of technical abilities here, that their access point was probably wide open.
A quick trip to http://192.168.0.1/ gave me a username/password dialogue, no password. Man I gotta love that.

I was in. A SHITTY Dlink router. After about 3 minutes I found the problem. They were essentially blocking all of the common ports. The genius that set it up was probably trying to allow it. I removed all the filters, rebooted, reconnected and viola! I'm posting this message.
I told the dealership that I'd send them a bill. I was slightly kidding, but at least I know I can connect to their access point any time now, and solve things myslef. I'm happy again now.
