[79942] in North American Network Operators' Group
Re: Jonathan Yarden @ TechRepublic: Disable DNS caching on workstations
daemon@ATHENA.MIT.EDU (Jason Frisvold)
Mon Apr 18 16:05:46 2005
Date: Mon, 18 Apr 2005 16:05:20 -0400
From: Jason Frisvold <xenophage0@gmail.com>
Reply-To: Jason Frisvold <xenophage0@gmail.com>
To: Mikael Abrahamsson <swmike@swm.pp.se>
Cc: nanog@merit.edu
In-Reply-To: <Pine.LNX.4.62.0504182113421.29505@uplift.swm.pp.se>
Errors-To: owner-nanog@merit.edu
On 4/18/05, Mikael Abrahamsson <swmike@swm.pp.se> wrote:
> It would be very interesting in seeing the difference in DNS traffic for =
a
> domain if it sets TTL to let's say 600 seconds or 86400 seconds. This
> could perhaps be used as a metric in trying to figure out the impact of
> capping the TTL? Anyone know if anyone did this on a large domain and hav=
e
> some data to share?
Our first foray into DNS was using a DNS server that defaulted to
86400 for new entries.. Not being seasoned, we left this alone..=20
Unfortunately, I don't have any hard data from that dark time in our
past..
Windows 2000 DNS seems to set the ttl to 3600, which is a tad on the
low side, I think... At least for mostly-static domains, anyways.=20
But I believe the reasoning there was that they depended heavily on
dynamic dns..
> If one had to repeate the cache poisoning every 10 minutes I guess life
> would be much harder than if you had to do it once every day?
I dunno.. how hard is it to poison a cache? :)
> --
> Mikael Abrahamsson email: swmike@swm.pp.se
>=20
--=20
Jason 'XenoPhage' Frisvold
XenoPhage0@gmail.com
