David Honig wrote:
> How long do commercial ISPs keep records of activity? I suppose
> call setup/drop info is sparse, they could keep it all, like telcos.
> Recording every TCP session would be too much, without a specific target, no?
> (Or is this wishful thinking?)
for germany (where we have privacy laws):
both telcos and providers usually keep log data for 80 days. unless the
involved party specifically requests that they keep them longer (e.g.
because you think the bill is too high and need the data to prove that)
they have to delete them after those 80 days.
from that I figure that several months is no issue. longer periods would
probably only require archiving the stuff to tapes or other media.
I doubt that anyone records every TCP session. companies such as the one
I work for each push several terrabyte to customers every month. large
providers would have to record several hundred TB per month. I
think/hope that the sheer volume of traffic puts a stop to any attempt
at doing so.
also, 99% of traffic is pretty boring. most likely, you'd rather do some
filtering first and record what remains.
