Date: Tue, 21 Feb 2006 08:17:00 -0800 (PST) From: Danial Thom <danial_thom@yahoo.com> To: Jeremy Kister <freebsd-01@jeremykister.com>, freebsd-questions@freebsd.org Subject: Re: traffic analysis Message-ID: <20060221161700.15895.qmail@web33307.mail.mud.yahoo.com> In-Reply-To: <43FAEC1C.7060103@jeremykister.com>
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--- Jeremy Kister <freebsd-01@jeremykister.com> wrote: > On 2/21/2006 5:10 AM, Robin Becker wrote: > > Our freeBSD 6.0 host is not yet in > production, but appears to have outgoing > > traffic of around 140Mb/day; the http logs > say 16 hits etc. The host provider > > said this > > 140Mb/day is really not that much. > > Unless my math is wrong because it's past bed > time: > 140Mb/day divided by 86400 seconds per day = > 0.001 Mb/second (average) > 0.001 Mb/second = 1.659 Kb/second > > this means a dialup modem could handle your > average traffic. > > and remember Mb is Megabits, not MegaBytes. > > > "The server is on a /20-network, and this > leads to high amounts of > > background traffic (ARP, broadcast, etc.). > These traffic types are > > likely to be the reason for most of your > outbound traffic." > > Is your server's netmask 255.255.240.0 ??? If > it is, call your > provider, laugh at them, and then call a new > provider. If your netmask > is not 255.255.240.0, call the person who gave > you that line, laugh at > them, and try to find someone more intelligent > :) > > You're surely not on a subnet with 4000 hosts. Laughing at your cable company will get you nowhere fast. That is a fairly typical subnet mask for a large cable network. Cable companies usually have larger networks than say, guys who hang out on the freebsd-questions list. Now on a cable network you'll see tons of INCOMING traffic (I get about 40pps of ARPS continuously), but you shouldn't be responding to them you can use tcpdump -i INTERFACE_NAME src YOUR_ADDRESS to quickly view the traffic going out of your machine. DT __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
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