On Mar 23, 2005, at 1:13 PM, Chris Buechler wrote:
> On Wed, 23 Mar 2005 14:55:09 -0800, Paul Vaughan <pvaughan at san dot rr dot com>
>> 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
>> 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.
Your netmask (255.255.248.0) is a /21, which is a combination of 8 of
the old "class C" networks.
Does your cableco really run a 2048 node LAN on the backside of your