We installed a Netopia 4522 T1 Router.
Specifically, from our ISP we received the following information:
SERIAL IP INFORMATION
WAN Default Gateway (ISP): 64.xxx.xxx.49
Customer Serial IP: 64.xxx.xxx.50
Subnet Mask: 255.255.255.252
ETHERNET IP INFORMATION
Public LAN Network: 67.xxx.xxx.192/29
Subnet Mask: 255.255.255.248
Usable Public IP's: 67.xxx.xxx.193 - 67.xxx.xxx.198
In addition, we, of course, have the SMTP relay server and the DNS addresses.
Currently, we have the serial IP information used to connect to the ISP's network. This then becomes the WAN address. The LAN address has been configured as both 67.xxx.xxx.192 and 67.xxx.xxx.193. Both allow access to the internet from the LAN. I'm told by the ISP the the .192 address is the proper address for the router. However, neither address, when in the router, allows me to ping it from the outside world.
On the LAN side of the router, we have a SonicWall firewall, which I would consider to be an issue, if I could at least ping the router. But I figure that since I cannot even ping the router from the public side, there would be no point trying to ping past it until I could.
If you would like more info, my e-mail is morr@synduit.com. Thanks!!