Date: Tue, 13 Feb 2001 12:47:34 -0500 From: Dennis <dennis@etinc.com> To: Julian Elischer <julian@elischer.org> Cc: freebsd-hackers@FreeBSD.ORG, isp@FreeBSD.ORG Subject: Re: ADSL and PPPoE question Message-ID: <5.0.0.25.0.20010213124015.02572a40@mail.etinc.com> In-Reply-To: <3A88A3DC.19B01FEA@elischer.org> References: <20768358.981997424567.JavaMail.imail@seamore.excite.com>
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At 10:02 PM 02/12/2001, Julian Elischer wrote: >kiguchi@excite.com wrote: > > > > On Mon, 12 Feb 2001 08:20:55 -0800, Julian Elischer wrote: > > > > > kiguchi@excite.com wrote: > > > > > > > > I'm very sorry if this is a stupid question. > > > > > > > > In our company, we want to set up a small network of about 20 PCs. > > ADSL > > > > seems like a good inexpensive solution, and I understand that FreeBSD > > with > > > > Netgraph can act like a gateway for our computers. > > > > > > are they in different places? > > > > No - the same place. > > > > > Negraph/ppp can act as a gateway for pppoe connections but I am not sure > > > how that helps you. How do you get the ADSL sessions to terminate on > > > an ethernet in your office? > > > (does your ISP provide that service?) The "way" do to this is by getting a frame T1 and running a DLCI to each of your customers, and do ethernet bridging over the frame. You have 1 line into your hub and you can service many customers on the frame. We have customers services 200+ customers on a single T1 and 800+ and a T3. A cisco 1600 will choke at about 150 customers (and perform like crap as you approach it). Dennis > > > > > > > > What I don't understand is whether we will have to use IP aliasing > > (NAT) or > > > > we can have our own routable IP range. > > > > > > That very much depends on what you think the topology looks like.? > > > > I thought something like this: > > > > [ISP] > > | > > | > > ----------------- > > Office [ADSL] > > | > > | > > [FreeBSD Box] > > | | | | > > | | | | > > [A][B][C][D] > > > > where A, B, C, D all have their own routable IPs. So according to > what you > > said, FreeBSD would need to establish a separate PPPoE session for each of > > the computers A, B, C and D, provided the ISP supports multiple PPPoE > > sessions over the single ADSL line? > >no that would give 4 connections to the FreeBSD machine, and not 4 >connections to the client machines. Does your ISP even use PPPoE? >it is possible to have ADSL without it.. > > > > > I need to know if this configuration is possible, so I will know what > to ask > > the ISP sales and support people. So far they haven't been very helpful. > > > > Thank you very much for your reply > > >what the ISP will try sell you will be: > > > [ISP] > > | > > | > > ----------------- > > Office [ADSL] > > | > > | <--------ethernet > +--+--+--+ > > | | | | > > | | | | > > [A][B][C][D] > >which is quite possible with ethernet attached ADSL modems. > >this might even be an ok way for you to go, >but the client machines will be 'vulnerable' on the network to >hackers. > > >A more common answer is: > > [ISP] > > | > > | > > ----------------- > > Office [ADSL] > > | > > | <--------ethernet > > [FreeBSD Box] > > | | | | > > | | | | > > [A][B][C][D] > >where the freebsd box does NAT and the other machines have addresses >assigned in the 10.x.x.x space or 192.168.x.x space. >this gives you some protection of the client boxes. > >-- > __--_|\ Julian Elischer > / \ julian@elischer.org > ( OZ ) World tour 2000-2001 >---> X_.---._/ > v > > > > >To Unsubscribe: send mail to majordomo@FreeBSD.org >with "unsubscribe freebsd-hackers" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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