On Sun, 25 Nov 2007 06:33:45 +1100, Ed Durrant wrote:
>The ISP's DNS may also be cached in the ADSL 2+ modem, as is the case
>with Telstra's "2-Wire" (make not connection description) modem. So the
>DNS address you give can in some cases be the actual ISP DNS server's
>addresses, the address of the port on the router or the address of the
>port on the ADSL modem. It is possible that either the modem or the
>router is blocking the required TCP/UDP DNS lookup ports in which case
>you have to use the cached DNS (or open the ports).
I have a Linksys gigabit smart switch in my network at home, it caches DNS lookups. This
and others like the Telstra should be totally transparent to the user, unless the DNS for
a particular site is being updates or has just been updated, then unplugging the devices
for a few seconds should clear them out. In the cases where the ISP's DNS is being updated
or taken offline (which is what it looks like happened to Julian) this kind of thing and
using 3rd party DNS servers like OpenDNS.org, make surfing work.
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