ip v4 & v6

[Rob Seastrom]

Alex Fraser <beatnic at comcast.net> writes:

> Netlings,   I connect to the internet through Comcast cable.  I have a snazzy Xfinity cable
> modem with 4 Ethernet ports and WiFi.  I use all 4 ports, the WiFi is flakey.  I run one of the
> ports to an older Linksys WiFi router running DD wrt.  It's serves upstairs Wifi and
> Ethernet.   I've used NAT for years and am comfortable with it.   I ran ipconfig on a machine
> directly connected to the Xfinity cable box.  I got listing for IPv6 and IPv4 addresses.   I
> can dig that.  What I don't understand is why running ipconfig on machines on the other side of
> the Linksys router running NAT that I also get IPv6 addresses and IPv4 addresses.  How do they
> get through the NAT router?

Please send copies of the ifconfig output from the machines behind the
NAT router and I'll provide narrative on them.

-r