Archived from groups: alt.internet.wireless (
More info?)
"Jeff Liebermann" <jeffl@comix.santa-cruz.ca.us> wrote in message
news:1b09k0phvob8q2d28lm2qi6mk5qmibgmrp@4ax.com...
> On Sun, 12 Sep 2004 08:47:54 GMT, "Gaz" <gaz8080@hotmail.coom> wrote:
>
>>We have a building divided into 4 flats (apartments) and flat has 5
>>bedrooms. Each flat also has a telephone line with adsl on it. We want to
>>provide internet access to each room (20 in total) so we have decided to
>>put
>>a wireless router in each flat (4 in total)
>
> Ummm... by "a telephone line", do you mean that all 4 apartments share
> a common phone line with a single ADSL circuit, or are there 4
> independent phone lines with 4 independent ADSL circuits?
>
>>This should all work fine but I was wondering whether it would be possible
>>to combine the 4 routers somehow into 1 wireless network and share 4 lots
>>of
>>bandwidth?
>
> Oh, you want to do bandwidth aggregation, where a given user now has 4
> times the bandwidth. That can be done but you'll require the
> cooperation of the ISP. Also, you won't like the cost. Right now,
> you can roam to any ONE of the 4 access points, and get all the
> bandwidth it can theoretically deliver. However, with bandwidth
> aggregation, you could theoretically use all 4 ADSL lines at once to
> get 4 times that bandwidth. Just one problem. All 4 ADSL lines and
> routers are on 4 different IP addresses. There's no easy way for you
> to "bond" the 4 IP addresses into one from just your end without the
> cooperation of the ISP (assuming they all come from a single ISP).
>
> See:
>
http://www.vicomsoft.com/knowledge/pdfs/teaming_qa.pdf
> for a nice survey of the various techniques involved. Note that
> "connection teaming" does not do what you want as you will still be
> limited by the bandwidth of a single ADSL connection.
>
> If a major performance improvement is what you want, I suggest you ask
> about higher speed ADSL circuits (3000 or 6000Mbits/sec), reduce the
> number of circuits from 4 to perhaps 1, and share the bandwidth
> between adjacent apartments. Much simpler.
>
>>Also, it would be nice if people could move around the whole
>>building (which has a communal area) and stay connected. I understand that
>>if I give all 4 routers the same SSID but put them on a differnt channel,
>>this will work. We have D-Link DSL G604T adsl routers.
>
> Ugh. An all in one modem/router. By using the same SSID, on
> different channels, you can impliment a form of roaming. However, you
> now have a security issue as there is no easy way to keep a roaming
> user out of your machines. Anyone that can access one access point
> can access all of them. You can't use MAC address filtering or
> different WEP/WPA keys to provide security because they would all need
> to be the same to effect roaming. There are ways around this using
> VPN's and multiple IP addresses, but perhaps it would be best if you
> reconsider how this is going to be used before I offer complicated
> solutions.
>
>>We would also like to implement some form of security, but are concerned
>>about making it too complicated for people. Which is the simplest, least
>>problematic security to use?
>
> Oh good, you didn't include least expensive. Setup a server of some
> sorts and use a VPN server to establish a VPN termination for the
> laptops. Run some VPN client software on all the laptops. These can
> get to the internet through the VPN but will not be able to see the
> other computahs in the network. You'll probably have to sell your
> routers and buy seperate DSL modems, routers, and wireless access
> points. There are also dedicated boxes that do this, but you don't
> wanna know the price.
>
>
> --
> Jeff Liebermann jeffl@comix.santa-cruz.ca.us
> 150 Felker St #D
http://www.LearnByDestroying.com
> Santa Cruz CA 95060 AE6KS 831-336-2558
Thanks for taking time to reply Jeff, it'll take me a while to digest all
the info!
Gaz.
Facebook
Twitter
Instagram