I'm trying to find something similar to iptables in Linux for Windows. I've tried using Windows firewall as well as editing the host file to block specific IPs, but had no success. I've also tried using WIPFW, but it wouldn't even install.. I was able to to use NetLimiter 3 to limit my connection speed to the specific IPs but whenever I setup a filter to block the IPs, those IPs can still connect.
I don't want a hardware firewall or router nor do I want a heavy duty firewall program. Ideally it would be a service that simply lets me add IP addresses and ranges and allows me to block / allow, incoming and/or outgoing connections. A GUI isn't even needed.