Date: Tue, 16 Jul 2013 05:54:28 -0700 (PDT) From: Barney Cordoba <barney_cordoba@yahoo.com> To: Eugene Grosbein <eugen@grosbein.net> Cc: freebsd-net@freebsd.org Subject: Re: FreeBSD router problems Message-ID: <1373979268.60540.YahooMailBasic@web121605.mail.ne1.yahoo.com> In-Reply-To: <51E4D5CC.9030601@grosbein.net>
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-------------------------------------------- On Tue, 7/16/13, Eugene Grosbein <eugen@grosbein.net> wrote: Subject: Re: FreeBSD router problems To: "Barney Cordoba" <barney_cordoba@yahoo.com> Cc: freebsd-net@freebsd.org Date: Tuesday, July 16, 2013, 1:10 AM On 15.07.2013 22:04, Barney Cordoba wrote: > Also, IP fragmentation and TCP segments are not the same thing. TCP > segments regularly will come in out of order, NFS is too stupid to do > things correctly; IP fragmentation should not be done unless necessary > to accommodate a smaller mtu. The PR is about NFS over UDP, not TCP. ------------------ Ok, so is there evidence that it's UDP and not an IP fragmenting problem? Out of Order UDP is the same issue; its common for packets to traverse different paths through the internet in the same connection, so OOO packets are normal. IP fragmentation is rare, except for NFS. A lot of ISPs will block fragmentation because it's difficult to shape or filter fragments; they're often used to defeat simple firewalls and filters. BC _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org"
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