At 1:12 PM +1200 2005-07-29, Simon Lyall wrote:
Is support for EDNS0 ( DNS UDP packets bigger than 512 octets) common?
It's picking up, but there are still significant percentages of
servers and clients out there that can't handle it. Part of the
problem is that even if the ISP nameserver can handle it, the local
resolver is much less likely to be able to do so. This means that
you might be okay server-to-server, but client-to-server still runs
into the same old truncation problems.
Of course, BIND is the only nameserver I know of that handles EDNS0.
of course some people config their firewalls to block udp port 53 packets
bigger than 512 octets.
Yup, that's part of the truncation problem. There's all sorts of
weirdness that goes on with firewalls, especially once you get
outside the normal expected operating mode.
--
Brad Knowles, <[EMAIL PROTECTED]>
"Those who would give up essential Liberty, to purchase a little
temporary Safety, deserve neither Liberty nor Safety."
-- Benjamin Franklin (1706-1790), reply of the Pennsylvania
Assembly to the Governor, November 11, 1755
SAGE member since 1995. See <http://www.sage.org/> for more info.
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