Right, so I just set up personal hotspot on my iPhone and am using it to connect to the internet over my 3G network. All of that seems to be working perfectly, but I have one issue. I did the Shields Up! security test and it was all green with all ports blocked but it told me that I'd failed the test because my computer responded to ICMP requests. I found this odd because I have the firewall set to block all incoming connections and it's in stealth mode, which System Preferences tells me specifically blocks ICMP. Clearly not. So I installed IceFloor so I could try and block it through that. I set it so only system services were allowed to connect and installed the scripts, but the test still tells me my computer responded to the ICMP requests. What do I do? Is there a way I can use the advanced settings in IceFloor to block ICMP requests? Or somehow fix the built in OS X firewall so it blocks them? Thanks.