We are currently going through a DDOS attack, and have outsourced DDOS mitigation to BlockDOS.net. Problem is they want me to block all port 80/443 traffic except from their IP address.

If I block all in the Windows Firewall Advanced Security, I can't override that with an allow.

How do I block everything but their IP for that one local IP address on Ports 80 and 443?


Windows firewall defaults to blocking inbound traffic. So remove all allow rules for inbound traffic on ports 80 and 443, then recreate a rule allowing traffic for the IP address you need.

Also, look into getting yourself a hardware firewall. A little part of me dies inside every time I see somebody making their server directly accessible on the internet without a firewall.

  • That is what I had thought... I had to then find the rule that was leaving the ports open. Thanks! – Jeremy Boyd Sep 17 '11 at 21:06

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