mike (digitalsushi) wrote,
mike
digitalsushi

open access points

I've been thinking about converting one of the two wireless access points that I have here into an open gateway to the Internet.

There's two: A dlink with routing and 802.11g, which is 5 times faster than 208.11b which it also does, and then there's the 802.11b linksys WAP11 bridge.

Fun Facts:

Routers seperate layer 3 networks.
Bridges seperate layer 2 networks.
Tunnels are lower layers piped through higher layers.
Switches are hardware implemented bridges.

What are these layers? Simple. Here's how the Internet works:

There's 7 major layers to this thing called the OSI model that defines data transfer over the Internet.

Application Layer <--- the is the top layer, 7
Presentation Layer
Session Layer
Transport Layer
Network Layer
Data Link layer
Physical Layer <---- this is the bottom layer, 1.

Let's leave out layers 5 and 6 because they can be grouped into layer 7 pretty darned easily, for this example.

So you've got your Application layer. That means your program, like Netscape, or IE, or AOL, or email or something. You want to send Mike some jpegs you took while you were smashed. Ok, the email program says, "I have your incrementally nakeder JPEGs. Where they going?"

The email program gives the JPEG to the operating system. Some magical layer 6 and 5 stuff happens, maybe. Then we get to the Transport layer, the fun stuff. Ever heard the phrase TCP/IP? That's layers 4 and 3 of the OSI model! So TCP gets it, and says "HRmmmmm this is an email, we're going over the email port, number 25!!! all abord!" And the JPEG gets an envelope that says "port 25!" on it. Then it goes further down, to layer 3, the network layer. "Whats the IP address?!" your computer asks the email program. "It's 123.123.123.123!" That's your mail server's IP address, which you are sending the email to so it can send it to me. So the computer sticks a bigger envelope on top of the one that says "Port 25". This one says "123.123.123.123". Then your computer goes, "well, OK, how do I send this to 123.123.123.123, anyways?" Your modem is the next hop to the Internet. When your email gets to it, the modem looks at the "123.123.123.123" and goes to the other end of the phone line, "Here idiot, this is for 123.123.123.123". And the other end of the phone line keeps giving your email to something else until finally it "routes" over the Internet to the mail server. Each time a piece of hardware talks to another, your email is in Layer 1, the hardware layer. Well anyways, eventually it makes it to my mail server. And my mail server goes "An email from 123.123.123.123? Ok *opens that envelope* Oh! Sure, port 25, I know that, that's email! *opens the other envelope* Ooh JPEGs! o.O You sure he's supposed to get these? Ok! Doesn't matter to me!" And it gives the JPEGs to the computer, and the computer writes them to a file, and then I get them the next morning when I get out of the bathtub and stumble into my bedroom to check my messages.

Anyways.

So that's like the Retard's version of how the Intarweb werks.

Where was I going with that?! Oh right!

So, the choice is clear, kinda, that I should use the linksys router. If only I could get Erik configured for the dlink one, it would be much easier. So far I can get him connected to only the linksys. What a bummer ...

Hrm. If the wirewall on the dlink isnt completely useless, I could in theory just set it up within there, and not worry about it. *shrugs* Well, I got what I wanted out of this waste of your time -- the next step to ponder in setting up an Open Access Point for the dezinens of Random Mill Building, 123 Anytown, 03820, USA.
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