[GTALUG] Cache DNS issues.

[D. Hugh Redelmeier]

| From: James Knott <james.knott at rogers.com>

| The original TTL was 24 hours.

How do you know that?  Do you know the queries William Muriithi's machine 
is making?  Do you know what DNS servers it is querying?

In a response to a DNS query, each record has its own TTL.  That TTL
depends on what the authoritative server set it to be initially and
how intermediate servers (if any) modified it (usually because it has
been aging in a cache).

You can see this with dig(1).