This got bupkus over on the Comcast forum, so I thought I'd try it here.
I was helping someone out with their gateway and came across something interesting. The default firewall setting is Low, so we flipped it to Medium and rebooted the gateway for good measure. We confirmed that the setting took.
We then used a site to determine the external IP (a 71.x.x.x address) and asked someone in another location to ping it. He could.
Why?
The modem explicitly says that it "blocks pings to the gateway" on Medium security. It specifically mentions that ICMP (needed for pings) is blocked from WAN-to-LAN.
TS070659C_050313_MODEL_862_GW_CT
↧