Re: www.eftps.gov contact

[Mark Andrews <marka () isc org>]

In message <CAL9jLaZMV9yo7Yzsydcj7U0o+DjHACEJ7z0ypN_00f+iM=JYuw () mail gmail com>, Christopher Morrow writes:
> On Tue, Dec 18, 2012 at 3:35 PM, Owen DeLong <owen () delong com> wrote:
> > On Dec 18, 2012, at 12:22 , Christopher Morrow <morrowc.lists () gmail com> wrote:
> >
> > > On Tue, Dec 18, 2012 at 3:19 PM, Mark Andrews <marka () isc org> wrote:
> > > > In message <CAL9jLabwE_e+VfzwYBTbrP50EicBvQ7z3XUQ3qwf3FHMiDLS0g () mail gmail com>, Christopher Morrow
> > > > writes:
> > > > > On Tue, Dec 18, 2012 at 11:15 AM, Darren Pilgrim <nanog () 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
-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: marka () isc org