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Using HomePlug PowerLine Adapters for Home Networking?
dbaman asks: "I have previously used a router with my broadband connection and run cables thru my house to have a home network. Now I'm in a new house, and I don't want to drill holes in the wall and run cable thru the attic again. I have considered 802.11 wireless, but am more interested in the HomePlug Powerline standard, which lets you use
the electrical outlets in the house as the network. Powerline uses 56 bit DES encryption rather than WEP like wireless, and is apparently a bit faster than wireless. LinkSys, GigaFast, and NetGear have adapters out, and a Powerline-based router from LinkSys will soon be available. Does anyone have any experience or advice with this new HomePlug PowerLine networking standard?"
i've never liked the idea of phone line or power networking, simply because power lines and phone lines don't stop outside my house - they're connected to everyone.
:(
'the signal will get weak' isn't good enough
Only major problem is that you're exposed to the line, and serious surges (read: lightning strikes on powerlines, or transformer breakdowns) will get through. Mind, the kind of surge I'm talking about there is likely to pop most surge guards - and a fair few cheaper UPSen - as well. Something else to consider, I guess.
The Queensland Electricity Commission, back in the early `90's, toyed with doing something like this - at a whole 2400 baud - to get some level of signals from one power station to another. By the time they finally got around to doing it, they got broken up - and had fibre networks anyway.
If this is your house... a pernament home, I would vote to just run the cable. Its just a one time thing and you get better speed, plus if you do ever sell its an added feature to the home.
56-bit DES is very weak these days. While it might keep a non-technical neighbor at bay, the very idea of sniffing your traffic off the power circuit would probably have kept them at bay anyways. If you do anything at home that's the least bit sensitive, I wouldn't entrust it to 56-bit DES.
Facts from when the EFF machine broke the DES challenge (it was 56-bit DES like you're about to use):
Time to crack key: 56 hours
Total cost of machine, including R&D: US$250K
The R&D was extensive, and would probably cost less now that people have an example to follow. Also, this was done in 1998, so there's been four intervening years to make it faster and cheaper.
11*43+456^2
It's the same as wireless from the point of view that you should always assume that you can be sniffed, and take suitable precautions for the kind of data going across the link.
This has been touched on previously in this thread from last month:
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http://ask.slashdot.org/article.pl?sid=02/10/17/1
Doesn't sound like a lot of people have any experience with this or have too many mental requirements. I use the homeplug to network my house. My cellar office is all decked out with standard linux boxes, routers, firewalls and such, but I let the rest of the house get connected through home plug. It is easy, works, and didn't have to punch any holes. I'm lazy, I recommend it. This tech will become standard in a LOT of homes....
--do these vendors offer a warranty for damage, and is there a return policy for "dissatisfaction"?
If you can get both of those, try it out! Don't like it, take it back, if their stuff fries your stuff next storm comes by, get new stuff.
I can't get to the page, so I'll ass-ume that this runs on the neutral leg. Only thing like that I ever tried before was using the neutral as an antenna, it works so-so, tried it both on TV and for shortwave.
With that said, if you already have the wired gear and router, cable, etc, just go ahead and run the cables, do a neat job.Usually just prying the base molding off carefully will eliminate a lot of holes. Use a nailset, find the finish nails, smack em in below the wood, then a careful prybar and peeling action, use a razor knife on the paint bead first if needed. Tuck the cable down there, you might have to trim the drywall a little,but this is no big deal, the cut part is under the molding,then replace molding, touch up the paint. Add in nice neat wall outlets. done, looks fine now, you'll have your hard wired network.
alt--just take up the wall to wall carpet if you have it. It'll just pull out from the wall-maybe, just depends on the molding if present and how tight the fit is, and etc. They'll be a space near the nailer strips, where there isn't any foam padding, or you can cut it a smidgen to clear the cable, replace the carpet then. You can rent a carpet kicker for around 6$ a day from most U B rentinit places, and that's easy to do as well.
Yes, go Ethernet. It's faster, cheaper and easier.
if you have a few extra bucks like $250 or so, you could hire a professional installer to lay the cable for you. Then you could wire up the jacks to save some money.
Maybe it wasn't an option because the house was already built, but I would have layed the cable and put up the outlets before the sheetrock/wallboard went up.
Another option would be a lot less work but would still require some do'ins. Run the cable through the cold-air return ducts. Then in the rooms with the cable, use outside boxes and outlets that you mount on the wall to house the jacks.
BTW, this has been covered before in a askslashdot last year sometime so I'd check back and see what people said there too.
It never interfered with anything regarding the phone, and I even had it going through the surge bar's phone protection, but I don't know how much good that will do. The biggest problem was getting phone cables to all the places I would sit with the laptop.
My understanding of the technology is that the signal is completely blocked by power company transformers, so the maximum "sniffing" range that I have to worry about are the other three houses on the same transformer that I'm on. If my neighbors are sniffing my traffic, they haven't bothered to tell me about it.
No problems with power surges damaging anything, and front-range Colorado is one of the lightning capitals of the world.
Has anyone out there tried both home networking over power lines and home networking over existing phone lines? I am trying to decide between the two technologies. My parents would like to share an Internet connection in their house. Performance is not a major issue. A reliable 1 megabit LAN would be good enough. Minor side-note: one computer is a mac so anything that I can't get working with a mac is out.
My house is fed from a pole-peg transformer which is split into two 110v feeds. You get 220V by tapping across the two 110v circuits for the dryer, the oven and stove. If you connect the HomePlug device to one of the two 110v sides of the pole peg transformer, does it work on the other 110v circuit?
I've never used phone or power line networking equipment. At this phase of my life, I have absolutely no interest in using it. Therefore, I am more than qualified to comment on it. :-P
A couple of posts here have questioned the security of phone and power line networking. It's a valid concern -- what goes on the lines in your house goes on the lines out of your house, too.
With power line networking, the signal will (most likely) be blocked by the transformer (on the pole or by the curb). If your neighbors are on the same transformer, they could potentially tap in.
As far as phone line networking, I can see two ways to make it more secure. The first is DSL filters. These are used in ADSL, put in the line between the DMARC and the telephone set (but not between the DMARC and the DSL modem). You could put one of these at the DMARC where the lines come off, and maybe it will block the signal from going out to who-knows-where. I say "maybe", because I haven't researched it.
A more secure solution is rather than using your primary line, use an unused pair in the phone cabling for the networking. I don't think it has to be hooked to a working phone line; it just uses a different band than POTS service. Note that some buildings are wired with substandard 2-pair wire which isn't even twisted pair. In this case, you risk crosstalk to and from adjacent pairs, and increased EMF interference which can reduce your data rates. You might not even have an extra pair to play with.
If you are lucky enough to have a home where the phones are wired with CAT5 in a star configuration, you can use two of the pairs for ethernet and scrap the phone-line networking altogether. This isn't spec, but in most cases it works. Splices in ethernet are bad, bad, bad.
Give me my freedom, and I'll take care of my own security, thank you.
Reporting from the better-late-than-never dept., there's an article on the "I, Cringley" site that was gushing on HomePlug.