A while back, we had made a post indicating we will be blocking some IP addresses due to spam and attacks:
We have now taken further steps. With the use of ConfigServer Security & Firewall, we have now blocked all traffic from China and Seychelles (country codes CN and SC).
In addition, many IP addresses from Psychz Networks are now being blocked. Psychz Networks has not responded to repeated abuse reports coming from their servers.
These steps have resulted in less spam, fewer automated signups, and faster response time.