Side-effects of edns-udp-size 512
dougb at dougbarton.us
Tue May 4 00:07:04 UTC 2010
On 05/03/10 17:04, Ray Van Dolson wrote:
> My workflow is as follows:
> 1. We notice slow DNS resolution to a given external domain (either
> via user complaint or other means)
> 2. Troubleshoot and identify that the given domain's primary
> nameservers don't properly handle or respond at all to EDNS0
> enabled queries (probably a network issue). In addition, this
> domain may have a fairly low TTL set which makes the problem a
> bit more visible to end users, especially if it's not queried
> regularly enough to stay in cache.
> 3. We attempt to contact the domain contacts to get them to fix
> their configuration.
> 4. If we don't get any response back after multiple tries, we'll
> typically diable EDNS for this particular domain.
That's a different picture. I think the above is quite reasonable, it's
adjusting the default that I object to.
Sorry for the noise.
... and that's just a little bit of history repeating.
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