Restricting browsers to only listed websites

[Reindl Harald]

Am 10.05.2013 18:09, schrieb Frank Murphy:
> On Thu, 9 May 2013 14:11:04 +0000
> davidschaak1 at mobilicity.blackberry.com wrote:
> 
>> Is there a way to allow a machine on the network to only access a
>> small list of websites?
> 
> in the machine you want limited. Use Opendns as the dns servers.
> https://www.opendns.com/

after we moved a server to a new location, prepared the change
hours ago by lower the TTL from 1 hour to 5 minutes and find out
that openDNS was one of few dns-servers which answered with the
old IP *some months* later i would not recommend anybody using
it because such things *must not happen - never*

-------- Original-Nachricht --------
Betreff: WRONG REPSONSES
Datum: Thu, 16 Feb 2012 15:16:42 +0100
Von: Reindl Harald <h.reindl at thelounge.net>
An: contact at opendns.com

good day

can you explain me why a server which was migrated
Oct 2011 to a new location is still with the old IP
in your nameservers?

OLD:     193.104.1.241
CURRENT: 91.118.73.17

we are SOA for this zone and had a TTL of 5 Minutes
some hours before migration and of 1 hour months
before it was done!

[harry at rh:~]$ nslookup caladan.thelounge.net 208.67.222.222
Server:         208.67.222.222
Address:        208.67.222.222#53
Non-authoritative answer:
Name:   caladan.thelounge.net
Address: 193.104.1.241

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