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#1
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Wireless router simply connects to DSL modem?
Wireless router simply connects to DSL modem?
Maybe this will be obvious when window shopping, but... My neighbor has a DSL modem and wants to share the connection with other people. Can we just stick a wireless router in front of the DSL modem? Or will the addition of a wireless router require a call to the Internet Service Provider? Recommendations for a popular and inexpensive wireless router would be appreciated. I've used a wireless router before, but it included a DSL modem, so the setup might have required some sort of cooperation with the Internet Service Provider. Thanks. |
#2
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Wireless router simply connects to DSL modem?
John Doe wrote:
Wireless router simply connects to DSL modem? Maybe this will be obvious when window shopping, but... My neighbor has a DSL modem and wants to share the connection with other people. Can we just stick a wireless router in front of the DSL modem? Or will the addition of a wireless router require a call to the Internet Service Provider? Recommendations for a popular and inexpensive wireless router would be appreciated. I've used a wireless router before, but it included a DSL modem, so the setup might have required some sort of cooperation with the Internet Service Provider. Thanks. My ISP doesn't require me to tell them anything. The ADSL modem is not "MAC locked", like a cable modem. So you should be free to do what you want there. You can stick a wireless router after the ADSL modem/router if you want. Just put the ADSL modem/router in bridged mode, and enter a VPI:VCI if that field is required. The wireless router you connect to the modem, will then automatically take care of the details on that side of the interface. ADSL modem/router --------- wireless router ------------------------ wireless (run in bridged mode) (Stores ADSL username/password) computers (use a separate subnet) (Click "connect" button to start ADSL) All you will need to run the ADSL modem, is the username/password used for the PPPOE session protocol. The new wireless router, should have a button you click, to start an ADSL session, and you can enter the details in the wireless router, so it'll remember the username/password and send it each time. You'll still need to remember the username/password which allows you into the web interface on the wireless router. First, you plug a computer into the left-most box, and set it for bridged mode. You can push the "reset" button to wipe out the settings. Just make sure you know what you're doing, before changing it. Once the left-most box is set up, and on a separate subnet (192.168.x.1), you can then plug a wire into the center box and set if you. Enter SSID, WEP or WPA, but also store the ADSL username/password. You'll also want to change the password on the wireless router itself, to make it harder to hack. Once the center box is programmed, unplug the wire, and attempt to connect wirelessly. You can enter http://192.168.y.1 wirelessly, and try to reach the web interface on the center box. Click the button to start the ADSL, and you should then be able to surf. ******* Sort the wireless routers on newegg according to review rating, and that should give you some idea what to buy. The latest thing is 802.11ac (marketing says it is faster than 802.11n). My ADSL is bad enough, that 802.11g would be good enough. http://en.wikipedia.org/wiki/802.11ac As for performance on wireless boxes, you can get some test results here. http://www.smallnetbuilder.com/wirel...ss-charts/view Paul |
#3
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Wireless router simply connects to DSL modem?
John Doe wrote:
Wireless router simply connects to DSL modem? Maybe this will be obvious when window shopping, but... My neighbor has a DSL modem and wants to share the connection with other people. Can we just stick a wireless router in front of the DSL modem? Or will the addition of a wireless router require a call to the Internet Service Provider? Recommendations for a popular and inexpensive wireless router would be appreciated. I've used a wireless router before, but it included a DSL modem, so the setup might have required some sort of cooperation with the Internet Service Provider. Thanks. Some other considerations for wireless routers. http://news.cnet.com/8301-1009_3-575...sks-than-ever/ Gotta keep the riff-raff out of your 'net. Paul |
#4
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Wireless router simply connects to DSL modem?
Paul nospam needed.com wrote:
John Doe wrote: Wireless router simply connects to DSL modem Some other considerations for wireless routers. http://news.cnet.com/8301-1009_3-575...routers-more-s ecurity-risks-than-ever/ Gotta keep the riff-raff out of your 'net. They have to get through your password to do anything, right? -- Paul |
#5
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Wireless router simply connects to DSL modem?
John Doe wrote:
Paul nospam needed.com wrote: John Doe wrote: Wireless router simply connects to DSL modem Some other considerations for wireless routers. http://news.cnet.com/8301-1009_3-575...routers-more-s ecurity-risks-than-ever/ Gotta keep the riff-raff out of your 'net. They have to get through your password to do anything, right? You can try "decoding" their other article. This is not exactly written like a primer, so it's hard to follow the mechanism in each case. http://news.cnet.com/8301-1009_3-575...ck-says-study/ I'm not surprised that some of the router makers, didn't respond to the security bulletins. I've seen products, where firmware updates are dribbled out for years, to little lasting effect (the firmware becomes more bloated, and hardly any more functional than the first release). So asking some of them for security patches, you're lucky if they can make a version that continues to work. My first router (at $300), was like that, a dreadful exercise in bad firmware. Thank God it finally died from a hardware failure. The $40 router that replaced it, is miles ahead. I've never had to flash the $40 router, as it "just works". The $300 router, some days you'd have to power cycle it two or three times - it would hang. Paul |
#6
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Wireless router simply connects to DSL modem?
Paul wrote:
John Doe wrote: Paul nospam needed.com wrote: John Doe wrote: Wireless router simply connects to DSL modem Some other considerations for wireless routers. http://news.cnet.com/8301-1009_3-575...routers-more-s ecurity-risks-than-ever/ Gotta keep the riff-raff out of your 'net. They have to get through your password to do anything, right? You can try "decoding" their other article. This is not exactly written like a primer, so it's hard to follow the mechanism in each case. http://news.cnet.com/8301-1009_3-575...ck-says-study/ This article described one of the methods in more detail. It's called CSRF (cross-site request forgery), and is done from the LAN side, just by surfing a web site with the appropriate attack code. So the browser on the LAN-side computer, sends LAN side packets to the router or modem. That's the attack vector. The web page code, tells the browser what to do. http://www.darkreading.com/vulnerabi...csrf/212201777 Paul |
#7
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Wireless router simply connects to DSL modem?
I ordered a Cisco-Linksys WRT54GL. It's inexpensive, and I liked the
fact that you can (if needed) boost the broadcast signal with custom firmware. I was reading about boosting the signal. Somebody said it doesn't do any good if the connected devices aren't powerful enough. That made sense, but then somewhere else somebody else pointed out that connected devices don't need to be powerful since uploads are much slower. That makes perfect sense, connected devices need not be powerful, considering the fact that smartphones are connected to wireless towers perhaps thousands of feet away. |
#8
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Wireless router simply connects to DSL modem?
John Doe wrote:
I ordered a Cisco-Linksys WRT54GL. It's inexpensive, and I liked the fact that you can (if needed) boost the broadcast signal with custom firmware. I was reading about boosting the signal. Somebody said it doesn't do any good if the connected devices aren't powerful enough. That made sense, but then somewhere else somebody else pointed out that connected devices don't need to be powerful since uploads are much slower. That makes perfect sense, connected devices need not be powerful, considering the fact that smartphones are connected to wireless towers perhaps thousands of feet away. The antenna radiation pattern is three-dimensional. The antenna the router comes with, attempts to radiate in all directions, for best coverage. It makes fewest assumptions about the layout of the computers. An 802.11N router, may have several antennas, for spatial redundancy. If one antenna path isn't optimal, the next one may work out better. That may also help with multipath issues. (One antenna has a multipath problem, while the other one is OK.) ******* If you use a directional antenna, the power doesn't go in all directions. In this example, the "front" and the "back" of the antenna, gets most of the power. And in the Z-axis, you can see there is still reasonably good output above and below the horizon. If you were positioned vertically over top of this antenna, you'd get zero signal. http://www.antenna-theory.com/antenn...ling/yagi6.jpg Many times, they show you only the X-Y plane, and don't bother explaining what happens in Z. At least this is a bit easier to visualize in some ways. I know I want the receiver sitting at 12 o'clock to this diagram. http://www.antenna-theory.com/antenn...ling/yagi5.jpg You have to think about those patterns, before putting directional antennas on everything. And the Z axis, has an impact on antenna siting as well. If you're doing wifi for the neighborhood, you'd think putting the antenna "up high" is good. This is true, if there are obstructions in the way. But if you look at the Z-axis pattern, you'll be losing something because all clients are below the horizon of the antenna. You could tilt the antenna, but that only works, if all the users are on one side of the 360 degree circle. The free tool 4nec2 can make those diagrams. I used that for my antenna project (to verify someone else's design). For example, if you were contemplating a "Pringles Antenna", see if you can get a NEC file for the design. Just to see how it works. And what the pattern looks like. http://en.wikipedia.org/wiki/Numeric...magnetics_Code http://www.qsl.net/4nec2/ ******* So we know that Linksys doesn't necessarily respond to all security bulletins. (Based on the links I previously posted.) That's a negative, if actually true. WRT54GL - Broadcom BCM5352 @ 200 MHz --- System On Chip running Linux "Linksys released the WRT54GL in 2005 to support third-party firmware based on Linux, after the original WRT54G line was switched from Linux to VxWorks, starting with version 5. The WRT54GL is technically a reissue of the version 4 WRT54G." "Fully supported by Tomato, OpenWrt, and DD-WRT." That means, it's actually a Linux computer inside, with limited Flash storage space and RAM. The amount of Flash and RAM determines what third party code it can run. If further researches indicated the unit had some security problems, you have the option of re-flashing it. In cases where the users of this router, are having problems exhausting the connection table when Torrenting, you can look at those third-party flashes as a solution. Assuming there isn't a hardware limit preventing a performance improvement. One of the torrent help sites, had a table showing some of the connection table limits for popular routers. The list was not exhaustive, and was probably done by one person's testing. Paul |
#9
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Wireless router simply connects to DSL modem?
What I find amazing is that smartphones can communicate with towers
that are thousands of feet away. |
#10
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Wireless router simply connects to DSL modem?
John Doe wrote:
What I find amazing is that smartphones can communicate with towers that are thousands of feet away. Wifi can go a long distance too. I've read several stories like the following one, where Wifi is tested in the mountains. In this case, they manage 237 miles. I think a modification to the timeout on the protocol is required, for things like this to work (as the Wifi was probably not design with that kind of propagation distance in mind). http://www.engadget.com/2007/06/19/v...ord-237-miles/ GSM is 22 miles for a tower, lesser distances for the lower forms of transmitters (like femtocells). The power on the cellphone, is 2 watts at 900MHz. This is a description for Wifi... "FCC rules require EIRP to be 1 watt or less. For example, you can set the transmit power in an 802.11b access point or client to its highest level (generally 100 milliwatts) and use a typical 3 dB omni-directional antenna. This combination results in only 200 milliwatts EIRP, which is well within FCC regulations." So we can see a couple differences. In the Wifi/router case, there is no tower (good elevation). The Wifi transmitter starts with a lower power. The default antenna has low gain, leaving some margin to the FCC (unlicensed) limit. I agree with you though, cell reception is nothing short of amazing, when you compare it to other forms of communications. Maybe it's because the antennas are everywhere. Paul |
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