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Cable/DSL Firewall Router Page 53
Appendix A: Frequently
Asked Questions
Q: What is the maximum number of IP
Addresses the NetComm Cable/DSL
Firewall Router can support?
The NetComm Cable/DSL Firewall Router
can support up to 253 IP Addresses in the
range of 192.168.1.2~192.168.1.254.
Q: Where should the NetComm Cable/
DSL Firewall Router be installed on the
network?
In a typical environment, the NetComm
Cable/DSL Firewall Router should be installed
between the ADSL/Cable modem and your
LAN. Connect the NetComm Cable/DSL
Firewall Router to the Ethernet port of your
ADSL/Cable modem, and connect your
computers to the RJ45 jack on the LAN side.
Q: Does the NetComm Cable/DSL
Firewall Router support IPX or
AppleTalk?
No. The NetComm Cable/DSL Firewall
Router was designed to provide a multiple
user LAN with shared Internet access and
supports only the TCP/IP Protocol. If your
Novell or Apple system is configured with
TCP/IP, the NetComm Cable/DSL Firewall
Router can support them.
Q: Does the NetComm Cable/DSL
Firewall Router support 100Mb Ethernet?
Yes, the NetComm Cable/DSL Firewall
Router supports both 10Mb & 100Mb
Ethernet on the LAN side, but only 10Mb on
the WAN side.
Q: What is “NAT” and what is it used for?
The Network Address Translation (NAT)
Protocol translates multiple IP Addresses on a
private LAN into a single public IP Address
that is accessible to the Internet. NAT not
only provides the basis for multiple IP
Address sharing but also provides security,
since the multiple IP Addresses of LAN
computers are never transmitted directly to
the Internet.
Q: How can NetComm Cable/DSL
Firewall Router share single user account
to multiple users?
The NetComm Cable/DSL Firewall Router
combines the following technologies to enable
this function.
NAT (Network address translation): NAT
is a technology which can create a private
network domain behind a public IP. It is
usually used as a firewall. It can also be used
when there are not enough IP Addresses.
DHCP (Dynamic host configuration
protocol): DHCP is a protocol to assign IP
Addresses to internal computers
automatically. It can save a lot of IP Address
configuration. This protocol is supported by
Windows 95/NT, Mac OS, and many other
popular OS.
DNS (Domain name service): DNS is a
protocol which translates Domain Names to
IP addresses that an Internet host can handle.
Addressing system using Domain names, like
www.yahoo.com, is easier to use than its IP
address, 204.71.177.70.
Q: What operating systems does
NetComm Cable/DSL Firewall Router
series support?
The NetComm Cable/DSL Firewall Router
uses standard TCP/IP protocol. It can be
operated as long as you have TCP/IP protocol
installed on your operating system (For
example: Windows 9x, Windows NT,
Windows 2000, Windows XP, etc.)
Q: Can I use multiple E-mail accounts if I
use NetComm Cable/DSL Firewall
Router?
Yes, you can. Some people think having one
Internet account means that they can have
only one E-mail account. However, E-mail is