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In message <CAL9jLaZMV9yo7Yzsydcj7U0o+DjHACEJ7z0ypN_00f+iM=JYuw at mail.gmail.com>, Christopher Morrow writes:
> On Tue, Dec 18, 2012 at 3:35 PM, Owen DeLong <owen at delong.com> wrote:
> > On Dec 18, 2012, at 12:22 , Christopher Morrow <morrowc.lists at gmail.com> wrote:
> >> On Tue, Dec 18, 2012 at 3:19 PM, Mark Andrews <marka at isc.org> wrote:
> >>> In message <CAL9jLabwE_e+VfzwYBTbrP50EicBvQ7z3XUQ3qwf3FHMiDLS0g at mail.gmail.com>, Christopher Morrow
> >>> writes:
> >>>> On Tue, Dec 18, 2012 at 11:15 AM, Darren Pilgrim <nanog at bitfreak.org> wrote:
> >>>>> 4890
> >>>> it might not be their (eftps.gov's) fault though... but sure.
> >>> If you run a server you should be expecting PTB for both IPv4 and
> >>> IPv6. If you have broken equipement in front of the server you can
> >>> set IPV6_USE_MIN_MTU to 1 on IPv6 sockets. There is no excuse to
> >>> have connections broken due to PMTUD.
> >> sure there is! "my isp filters icmp"
> > Get a better ISP.
> both of you crack me up.
Setting IPV6_USE_MIN_MTU on a IPv6 socket is a couple of lines of
code in the http server. Been there, done that. If you can't do
that then set the interface MTU to 1280. I repeat there is no
excuse to have connection broken due to PMTU issues. A compentent
sys admin can work around upstream problems.
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: marka at isc.org