I'm unsure what is going on with this but when I went to the (Firewall:Diagnositics:)Sessions page, the first line shown is:
<-- (out). icmp 71.233.x.x:29816 (wan dhcp ip) 71.233.x.x:29816 (isp gateway listed in interface summary) 0:0 29711 10 56.77 KB 1.55 MB Block priv... link (goes to checkbox setting for Block Private Networks option)
...and I'm wondering what is going on. I have no formal training in networking, just learning as I go, and was wondering if that Block Private Networks link is being incorrectly displayed or something.
71.233.0.0/15 is a Comcast block that doesn't appear to match any of the networks listed as Private.