so I have setup an old pc with ipcop and that went fine, however, this has exposed my poor understanding of firewall configuration which is the whole reason I setup ipcop in the first place. My setup is, the red interface ( which I think is the interface that will interact with the "outside world" - maybe it can be called the WAN ) has an IP address of 192.168.0.80. My green interface ( the internal, or LAN interface ) has an address of 192.168.0.75. Initially, just one of my computers will be using the firewall, until I work out the bugs, so this pc has an address of 192.168.0.100. My cable modem, aka my gateway is 192.168.0.1. Also, I have disabled the windows firewall.
So, I'm pretty sure the proper setup would be to have the firewall between my computer and the gateway.
sorry for the crude drawing, all i have is MS paint. so that is my physical setup.
when I try to ping 192.168.0.80, 192.168.0.1 or 192.168.0.75, I cant get a response. I can't ping my gateway, so sure enough, i can't get out to the web. So possibly the ipcop firewall initially doesn't allow any traffic? which might explain why pings weren't working either. of course since I can't ping my red or green interface i can't get to the web interface to poke some holes in my firewall.
so I tried plugging the red, green, cable modem, and pc into the same switch, and then of course, i ping everything and get out to the web, and can get to the ipcop web interface to open the holes i need - presumably port 80 at the least.
I go to the web interface and I'm not sure how to open port 80. would it be just port forwarding? or is it a firewall rule to allow traffic from the red interface for port 80 to go to the green interface? Also, I tried creating a firewall rule, but i don't even know if i did it right. for instance would i allow traffic from the red interface coming from 192.168.0.1 to the green interface 192.168.0.75?