Date: Sun, 18 Aug 2002 02:48:55 -0700 From: Terry Lambert <tlambert2@mindspring.com> To: Alfred Pythonstein <pythonstein@hotmail.com> Cc: hackers@freebsd.org, chat@freebsd.org Subject: Re: Insider's scoop: Why FreeBSD is dying Message-ID: <3D5F6D87.76848740@mindspring.com> References: <F155HlM9QTfXPyGvQ3C0000b599@hotmail.com>
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Wow. I guess I'll address the most important point that hit home for me from that post... Examining the headers, it looks like Hotmail has a full class "B" (64.4/16); that's surprising. Why the heck do they have a full class B?!? If you are using load balancers for distribution, then you basically need only enough IP addresses to provide publically accessible VIPs to the various public services you export as seperate entities. There's no *way* they have 65,534 (subtracting out the unusable ones) of those! Seems to me, you could do all of Hotmail with well under a class C, if that. You could *probably* do it with a /28, which is the smallest BGP routable chunk UUNET supports. Does this seem odd to anyone else? Is Microsoft just an address space pig, or what? Do they consider the IPv4 address space as part of the company's valuation when making a purchase decision, or is this some legacy thing with Hotmail that no one at InterNIC bothered to correct, and they are just "address rich" by chance (this seems most likely, to me)? Inquiring minds want to know. Maybe it's just so that if a host gets RBL'ed or otherwise blacklisted, they can switch IPs, and won't have an interruption of email service to their customers? If that's the case, that implies the SPAM turnover on those things is on the other of one 65536th of the time it takes to get off a blacklist. That would imply they are sending an *incredible* amount of SPAM (obviously, that assumes a single VIP, which is really unlikely, but it's still within an order of magnitude, asuming a LocalDirector or other load balancer. Anyway, that's what I got from the post... -- Terry To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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