Re: Home Network, step by step?

From: R. Scott Kennan (rskennan_at_gmail.com)
Date: 12/14/04

  • Next message: R. Scott Kennan: "Re: Home Network, step by step?" 
    Date: Tue, 14 Dec 2004 00:48:23 -0500
To: "Kevin D. Kinsey, DaleCo, S.P." <kdk@daleco.biz>

    I'm sorry, but in my earlier message, I neglected to fully explain my
    setup. I can't afford $50 for a router (the holidays etc.), so I have
    to do it the hard way, at least for now. I'm a writer, and I want to
    be able to work on my own computer during the holidays without
    constantly being asked by my family to use the internet.

    Ok, here's my setup: I have broadband over a surfboard modem from Cox
    cable. I have an ethernet card (D-link) that I just picked up, and a
    crossover cable that connects the two computers via this card, to
    another, identical one on the linux box. I've had this working using
    Win XP (very easily), but I really don't want to go back if I can
    avoid it.

    Here's the results of ifconfig (I can't make heads or tails of it-
    which one is my incoming internet connection? ):
     
    fwe0: flags=108802<BROADCAST,SIMPLEX,MULTICAST> mtu 1500
            options=8<VLAN_MTU>
            ether 02:e0:18:11:a5:2b
            ch 1 dma -1
    bfe0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
            options=8<VLAN_MTU>
            inet6 fe80::2e0:18ff:fef9:96e9%bfe0 prefixlen 64 scopeid 0x2
            inet 68.230.154.245 netmask 0xfffffe00 broadcast 68.230.155.255
            ether 00:e0:18:f9:96:e9
            media: Ethernet autoselect (100baseTX <full-duplex>)
            status: active
    rl0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> mtu 1500
            options=8<VLAN_MTU>
            ether 00:11:95:1d:43:fd
            media: Ethernet autoselect (10baseT/UTP)
            status: no carrier
    plip0: flags=108810<POINTOPOINT,SIMPLEX,MULTICAST> mtu 1500
    lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
            inet 127.0.0.1 netmask 0xff000000
            inet6 ::1 prefixlen 128
            inet6 fe80::1%lo0 prefixlen 64 scopeid 0x5

    Anyway, thank you all very much, I really appreciate the help.

    On Mon, 13 Dec 2004 10:47:03 -0600, Kevin D. Kinsey, DaleCo, S.P.
    <kdk@daleco.biz> wrote:
    > R. Scott Kennan wrote:
    >
    > >Hey everyone, this is my first post. I'm a freebsd Newbie who really
    > >doesn't know much at all yet, so please excuse my probably lame
    > >question.
    > >
    > >
    > >
    >
    > Welcome! No question is dumb, per se; it is worse to not ask
    > and remain ignorant, IMHO. The quid pro quo is that it is
    > more appropriate to ask the list on freebsd-questions; I would
    > guess however that you couldn't have known that without reading
    > the list charters, which seems like a bother (but may prove
    > interesting to you later on). It does beg the question, "what's
    > the newb list for", ;-) but that's not relevant to this post.
    >
    > At any rate, the question....
    >
    >
    >
    > >At any rate, I need to network two computers- my BSD box, and one
    > >running Mandrake Linux 9.2 (for now). I also need to share my
    > >internet connection. Actually the internet connection sharing is more
    > >important. What steps do I need to take? All the pages I've brought up
    > >seem to assume some prior knowledge of both networking and/or Unix (I
    > >have absoultely none), and I apparently don't even know enough to
    > >recognise the information in the FreeBSD handbook. I installed FreeBSD
    > >to learn, but I'm totally lost in this matter.
    > >
    > >If anyone can help me, or tell me to RTFM (as long as you point out
    > >the manual) I'd appreciate it. Once again, Sorry for the dumb
    > >question. Thanks.
    > >
    > >-R. Scott Kennan
    > >
    >
    > Darren K. & others have been pointing you in the right general
    > direction. Using an internet facing **router** instead of a switch
    > would get you up and going with a relatively small investment of
    > cash and even less of RTFM. To do it with no/less cash, (but a
    > counterbalancing investment in time/knowledge gained) you'll need
    > to use one of the computers you already have and NAT. If you
    > use a broadband Inet connection, you'll need to run natd(8)
    > and have a working knowledge of kernel building or kldloading
    > along with familiarity with ipfw(8); if you have a PPP or PPPOE
    > type connection, you may be able to run your ppp with the -nat
    > option, as I do at home (dialup; too many feet out of town here
    > in the sticks....)
    >
    > As for routers, I have used the LinkSys BEFSR41 and the D-Link
    > DI-604* for this purpose in SOHO environments with {relatively}
    > few problems. Once I learned enough about FreeBSD, I began
    > to switch out these small devices for old computers (of which I
    > have a plethora), in order to have more fine-grained control of
    > things (particularly firewalling and offering more services to the
    > LAN machines).
    >
    > To learn the basics of NAT (Network Address Translation), you
    > should read the Handbook subchapter on "Network Address
    > Translation" in the "Advanced Networking Chapter" (which in
    > my current doc build is section .8 of chapter 24 [24.8]. I think
    > my copy is relatively up to date ... if your doc build [assuming
    > you have one] is older, the numbering system may vary slightly.
    >
    > To learn the specifics, there is a section called "RUNNING NATD"
    > in the natd(8) manual page; it covers the necessary information
    > for enabling natd in the kernel, adding rules to ipfw(8), and so
    > on.
    >
    > Good luck, and welcome to FreeBSD!
    >
    > Kevin Kinsey
    >
    > *Heck, buy pizza for the family and I'll send ya the Dlink.... :-D
    >
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