On Wed, 23 Mar 2005 14:55:09 -0800, Paul Vaughan <pvaughan at san dot rr dot com> wrote:
> Two IP address for WAN
> 
> My Internet ISP is my cable company.  So, i connect through a cable
> modem.  I setup a m0n0wall firewall behind the cable modem.  I gets it's
> IP address via DHCP.  When I go to the webGUI Configuration page under
> Status|Interfaces it lists the WAN interface as indicated below:
> 
> Status                up
> MAC address   00:xx:xx:xx:xx:xx
> IP address         XX.YY.ZZZ.153
> Subnet mask      255.255.248.0
> Gateway            XX.YY.ZZZ.1
> 
> Why the two addresses?  Gateway and IP.
> 

The IP is your public IP, the gateway is its default gateway, i.e. the
ISP's router.


> I can ping the gateway from outside the LAN but can't ping the IP
> address.  What gives?
> 
 
m0n0wall blocks ICMP by default so your WAN IP won't respond to pings.
 Typically ISP's won't drop it on their routers.

-Chris