Good question - computationally expensive contracts will be removed automatically as part of a mechanism that keeps track of cost/benefit to the peer for each contract.
It’s matching two comments in the thread. It bolds the part that talks about iptables in each.
So it’s not like it’s irrelevant, even though it is certainly not actually the most relevant one either.
It seems to give better results if you are more specific. For example, try the following search:
how to use iptables effectively
And have a look at the first five or so results.
Also, note that OP said it’s searching about six months worth of data. So if anything specific about iptables that you were looking for is older than that then their search tool doesn’t know about it.
