I am typing this on a laptop that blinked a strange orange light when I plugged in the power cord, that has a red line on the left side of the screen, and where a large gap has developed in the upper left side of the case. Clearly, I have to be prepared, literally any evening now, for me to turn on the computer and for it simply not to work. I’ve already spent too much money this month; on March 1, however, I will order various pieces of electronics.
I’m comfortable with most of the decision making. But there will be one significant change that I don’t have much experience with: I’ll be going from one computer connected to a cable modem via an ethernet cable to multiple devices (computers and game consoles) connected largely or entirely to each other and the cable modem via wireless. And I’ve never set up, or even used, a wireless network before. (Actually, I’ll have questions on the Mac transition, too, but that can wait for a bit.)
So I offer up my plight to the collective wisdom of my readership. Here’s the setup:
- I’m planning to buy a Sun Ultra 20 (probably the base model with a slightly less bare-bones graphics card), on which I’ll run Linux.
- I’m planning to buy one of the new Mac laptops (the stock lower-end model might be good enough).
- I already have one console with wireless access (the DS); I assume that, in the next generation, I’ll want to connect all the consoles up to the internet, whether through wires or wireless. I will doubtless acquire more networkable devices in the future.
- There is a cable jack in the den, where the consoles are located; there isn’t a cable jack in the library, where the Ultra 20 will be located.
- The only external access that I’ll want to allow into my network, at least for now, is to let myself ssh into the Ultra 20.
- I’m leaning towards not allowing free access to the wireless network, for security reasons.
So: what should I do? I’m assuming that I want to connect a wireless router to my cable modem in the den; any specific buzzwords I should look out for? Anybody have any favorite routers? What’s worth spending more money on, what’s not? (Presumably I want a device that can do 802.11g.)
As far as security goes, it sounds like WEP is quite bad, but WPA is decent. (And there are multiple flavors of each?) It looks like the DS only supports WEP; will the router support different devices using different encryption protocols (after all, I don’t care how well the DS traffic is encrypted), or is it an all-or-nothing thing?
How should I connect the Ultra 20? A wireless card? A hub? A router? A long ethernet cable? How does security work with wireless hubs? Any gotchas with Linux and wireless cards?
Is AirPort Extreme just Apple’s name for 802.11g, or do they have proprietary extensions?
Anything else that I’m forgetting to ask?
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> any specific buzzwords I should look out for?
Everyone uses the Linksys WRT54G, which is the moulded blue and black case wireless router that you’ve probably seen before. It’s cheap and reasonable, and has a web interface for doing things like setting up port forwarding, so you can forward ssh from the router to your Sun.
(Why get an Ultra 20, anyway? Honest question; I used them a long time ago, and liked the reliability, but surely they’re not competitive with spending $300 on a Dell desktop anymore?)
WEP is its weakest form isn’t great, but it’s a question of proportion — if someone can log your wireless traffic for a few hours and collect gigabytes of data on it then they might be able to determine your session key. But why are you using security; isn’t it to stop drive-by WiFiers from using your network and not much else? After all, your traffic’s still safe if it’s being encrypted at the application layer. I don’t know whether a router would speak WPA and WEP, but I suspect routers either support {WEP,WEP+WPA,WPA} based on their age and price.
> Any gotchas with Linux and wireless cards?
Some are glorified FPGAs that have all of their firmware uploaded when the device is plugged in, and if your Linux distribution doesn’t have permission to distribute the firmware then setup can be a annoying. Broadcom chipsets are the main offender for this.
> Is AirPort Extreme just Apple’s name for 802.11g, or do they have proprietary extensions?
Just 802.11g, as far as I know. The chipset (but not what they speak on the air) is proprietary, so you couldn’t run Linux on your Mac laptop. (Well, you could if you used a USB wireless card with an open chipset.)
> How should I connect the Ultra 20?
I suppose I would seriously consider a USB WiFi device. Either that or the long ethernet cable.
– Chris.
2/24/2006 @ 6:59 am
Bah. Wireless. I don’t believe in wireless. So I can’t help answer your questions.
2/24/2006 @ 7:47 am
You must be thinking of a different product named Ultra 20; the one that I’m thinking of is a nice little Opteron box at a list price of $900, on which I get a 35 percent discount. As far as I can tell, it is quite competitively priced, as long as you don’t buy peripherals from Sun – the collective that I’m part of (for web hosting and e-mail) just got the equivalent model in a 1U factor (Sun Fire x2100), and when we did our comparison shopping, nobody could come up with a better suggestion.
Thanks for the info!
2/24/2006 @ 9:10 am
Oh! Indeed I was. So Sun brought out the Ultra {1,2,5,10,30,40,60,80} and then came back to 20? :)
– C.
2/25/2006 @ 8:44 am
[…] My current network plan is as follows: […]
2/27/2006 @ 10:06 pm