Date: Fri, 13 Sep 1996 06:52:35 -0700 From: "Michael L. VanLoon -- HeadCandy.com" <michaelv@MindBender.serv.net> To: Robert Hanson <roberth@cet.com> Cc: Andrew Stesin <stesin@gu.net>, firewalls@greatcircle.com, freebsd-hackers@freebsd.org Subject: Re: SYN floods - possible solution? (fwd) Message-ID: <199609131352.GAA02501@MindBender.serv.net> In-Reply-To: Your message of Fri, 13 Sep 96 04:39:14 -0700. <Pine.LNX.3.94.960913043223.30937J-100000@cet.cet.com>
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>> > I've heard of 1,000 per sec which implies that
>> > this box needs to hold open 30,000 to 75,000 potential sockets. Is there
>> > any problem within IPv4 (seq #'s?) that would make this inherently
>> > impossible?
>> 200MHz P5, 2 PCI NICs, 256+ Mb RAM,
>> fast SCSI disk subsystem, + intelligent OS with
>> intelligent packet filter. That's a today's firewall
>> of choice for many people, anyway.
>> What do you people think? This should (might?) work...
A P6 should give you much better through-put than a 200MHz P5 (and it
still has room to grow). Not only that, but 200MHz P6s are cheaper
than 200MHz P5s right now. I've also heard that a 200MHz P5 doesn't
really run any faster than a 166MHz P5, because the bus is mostly
saturated.
>im thinking dec alpha with 64 bit OS...
>is there 64 bit FreeBSD coming? Evidently Linus is working on
>Linux/Alpha...
That is an alternative. While Alphas are great, really fast CPUs,
they also cost a lot more per MIPS than a decent Intel box. On the
other hand, a really good Alpha (read expensive) can scale way beyond
an Intel box, if you need the absolute fastest processing you can get.
NetBSD/Alpha exists, and is mostly 64-bit from top to bottom. I don't
believe Linux/Alpha is truly 64-bit. You might also consider going
commercial, if you're going to buy such high-end hardware. Digital
Unix (aka OSF/1) isn't as "sexy" as Net/FreeBSD, but it works, is
stable, and actually will support multi-processor Alphas reliably.
-----------------------------------------------------------------------------
Michael L. VanLoon michaelv@MindBender.serv.net
--< Free your mind and your machine -- NetBSD free un*x >--
NetBSD working ports: 386+PC, Mac 68k, Amiga, Atari 68k, HP300, Sun3,
Sun4/4c/4m, DEC MIPS, DEC Alpha, PC532, VAX, MVME68k, arm32...
NetBSD ports in progress: PICA, others...
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