Regarding the DOS/DDOS attacks, we have taken action on the perpetrator based on the evidence provided, so thank you for that.
It sounds like the attacks are happening outside of Blizzard’s domain. Ultimately, there is nothing we can do to prevent a DOS (or DDOS) attack which occurs outside of the Blizzard infrastructure.
However, here are some suggestions to try as preventative action:
- Alert your ISP to the attack, providing as much data as you can. The penalties for DOS attacks are severe these days (even for threatening an attack) and your ISP will likely take this seriously, especially if you have IP addresses and timestamps of the attack. On top of following up with law enforcement, they may be able to provide additional protections on their side.
- If it’s a DOS attack rather than a DDOS attack, you should be able to configure your router to block all traffic from the IP address. It’s unlikely to be a true DDOS, as these are expensive and non-trivial to coordinate. It’s unlikely to be more than a handful of offending IP addresses that you/your ISP could block.
- As previously suggested, disable "prefer port 6112" in the SCR options, and ensure your router is not forwarding port 6112. By default, your router should not be permitting random traffic to any port to reach your network. If you have manually forwarded port 6112 or other ports on your router, these are potential vulnerabilities.
- If you have a dynamic IP address, re-lease your IP address to try to get a different one.
- As has already been suggested in this thread, using a VPN will allow you to easily cycle through various IP addresses. The VPN provider may also be able to filter out traffic from the offending IP address.