My spam Blocklist has been slowly growing since I created it in order to stem the tide of comment spam coming from Nobis/Ubiquity Server-owned address blocks. Ultimately I made the choice to block all the netblocks that they had allocated from ARIN and that seemed to have worked, up until today when I started getting comment spam from some brand new Nobis/Ubiquity addresses.
It would seem that they’ve got themselves a netblock from RIPE and started using that for spamming as well; the range in question is 18.104.22.168/27 but given their apparent dedication to illegal activity, it wouldn’t surprise me if others start popping up here and there as well. Thankfully, the relative scarcity of available IPv4 blocks is making it much tougher for these spamming fuckers to evade blocking mechanisms without resorting to botnets.
That said, when you’re getting more than 10 times as many spam comments as legitimate ones, it doesn’t exactly fill you with confidence that we’ll ever get a real handle on the problem.