After logfile rotation (ca 06:30 local time), the percentage of IPv6 requests is calculated;
IPv6 source addresses
------------------------------ x 100 %
IPv4 + IPv6 source addresses
For destination ports 25 (mail), 53 (DNS) and 80 (web).
And;
www.sput.nl AAAA queries
------------------------------ x 100 %
www.sput.nl A + AAAA queries
These are not necessarily from IPv6 source addresses.
This is then plotted in the following graphs;
The large green spikes are spam attempts and limited to 10%.
The increase in DNS traffic in October corresponds with free IPv4 falling below 5 %.
Each entry runs from 00:00:00 to 23:59:59 local time.
RRDtool is made to believe that the
update takes place just after 00:00:00 UTC. It likes it that way.
Due to a RRDtool bug, during DST the graph will show a 2nd October (instead of
November) when the '--x-grid' option is used.
The red and green graphs are an indication of ISPs IPv6 use (resolvers and mail
servers).
The yellow and blue graphs are an indication of IPv6 use at home.