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Re: feasability check - P133 as router/server
- To: Linux-IL <linux-il(at-nospam)linux.org.il>
- Subject: Re: feasability check - P133 as router/server
- From: Eli Marmor <marmor(at-nospam)netmask.it>
- Date: Mon, 03 Sep 2001 07:22:45 +0200
- Delivered-To: linux.org.il-linux-il@linux.org.il
- Organization: Netmask (El-Mar) Internet Technologies
- References: <Pine.LNX.4.33_heb2.09.0109030712300.23497-100000@green>
- Sender: root(at-nospam)main.aquanet.co.il
- Sender: linux-il-bounce(at-nospam)cs.huji.ac.il
Ira Abramov wrote:
> On Mon, 3 Sep 2001, Alon Altman wrote:
> > 3) Is the switch with one NIC configration for the router OK?
>
> that one I kind of hate. for security's sake I would prefer a second
> NIC, as I have no idea what ADSL works like. I once installed something
> similar on someone's home cable internet connection, @home gave him a
> real IP and I did NAT (then Masquarading) with a single interface to
> 10.x.x.x, and discovered I was on a private LAN with the rest of the
> neighbourhood all of a sudden (the modem worked like a bridge!) and I
> found people running a BBS here and a quake server there on the 10.
> network, and @home never knew. funny but definitly insecure. linux
> compatable 10BaseT cards are about 100-120 NIS these days, so buy a
> cheap one for the ADSL and another, 100BaseT for a direct, crossover
> connection to your win machine for maximum throughput (cheaper than
> getting a hub anyway)
The guy said he have 3 machines, one Linux and 2 Wins.
I'm not sure it's feasable to avoid a hub. At least for the internal LAN.
Otherwise, he needs 3 NICs with 3 crosses. The Linux will become a bridge
not only between the ADSL and the internal LAN, but also between the two
Wins. And 3 cards are not so cheap. In addition, this PC is not new, and
I don't think he has 3 empty slots/sockets (don't forget that in old PCs,
many slots are spent for VGA/sound/serial/parallel/etc.). And I believe
that he doesn't have 3 unused IRQs. In old PCs, sometimes it's hard to
find even one unused IRQ.
By the way:
How are all those "Linux routers" with 3, 4, or even 5 NICs, built?
I saw cards with 4 RJ45 ports, but they cost a lot ($700), which is more
than a new computer.
In addition, you either need 4 unused IRQs, or you miss the advantage of
these cards.
So what can I do if I want to build a 4-way router?
(I want one cross to the FR Cisco, one cross to the ADSL, one Eth to the
LAN, and one Eth to the DMZ).
Is it possible?
Is there any way to avoid the need for so many IRQs?
Or a cheaper multiport NIC card?
Can I save IRQs by throwing some hardware that is not required for
routing?
--
Eli Marmor
marmor@netmask.it
CTO, Founder
Netmask (El-Mar) Internet Technologies Ltd.
__________________________________________________________
Tel.: +972-9-766-1020 8 Yad-Harutzim St.
Fax.: +972-9-766-1314 P.O.B. 7004
Mobile: +972-50-23-7338 Kfar-Saba 44641, Israel
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