A lot of comment spam has been coming from IP addresses in the following netblocks:
Fortunately, I know how to use IPtables
# iptables -A INPUT -s 18.104.22.168/16 -p tcp -m tcp -j DROP
# iptables -A INPUT -s 22.214.171.124/16 -p tcp -m tcp -j DROP
# iptables -A INPUT -s 126.96.36.199/16 -p tcp -m tcp -j DROP
Blocking a /16 is a bit of a Nuclear Option, but I’m sick of it. No doubt this is going to block a few legitimate users too ….. my recommendation is to switch ISPs, because you are doing yourself no favours associating with an ISP who are friendly to spammers.
(If I get any comment spam in response to this post, I will approve it — after blocking their IP addresses — but with links disabled.)