Test Your Internet Connection; Advanced Configuration; Network Address Translation Overview - ZyXEL Communications Prestige 650H-E Series Manual

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4.4 Test Your Internet Connection

Launch your web browser and navigate to www.zyxel.com. Internet access is just the beginning.

Refer to the User's Guide for more detailed information on the complete range of Prestige features.

If you cannot access the Internet, open the web configurator again to confirm that the Internet

settings you configured in the Wizard Setup are correct.

This section shows how to configure some of the advanced features of the Prestige.

NAT (Network Address Translation - NAT, RFC 1631) is the translation of the IP address of a host

in a packet. For example, the source address of an outgoing packet, used within one network is

changed to a different IP address known within another network.

In the simplest form, NAT changes the source IP address in a packet received from a subscriber (the

inside local address) to another (the inside global address) before forwarding the packet to the WAN

side. When the response comes back, NAT translates the destination address (the inside global

address) back to the inside local address before forwarding it to the original inside host. Note that

the IP address (either local or global) of an outside host is never changed.

NAT supports five types of IP/port mapping. They are:

1. One-to-One: One-to-one mode maps one local IP address to one global IP address. Note

that port numbers do not change for One-to-one NAT mapping type.

2. Many-to-One: Many-to-One mode maps multiple local IP addresses to one global IP

address.

3. Many-to-Many Overload: Many-to-Many Overload mode maps multiple local IP

addresses to shared global IP addresses.

4. Many-to-Many No Overload: Many-to-Many No Overload mode maps each local IP

address to unique global IP addresses.

5. Server: This type allows you to specify inside servers of different services behind the NAT

to be accessible to the outside world.

SUA (Single User Account) is a ZyNOS implementation of a subset of NAT that supports two types

of mapping, Many-to-One and Server. The Prestige also supports Full Feature NAT to map

multiple global IP addresses to multiple private LAN IP addresses of clients or servers using

mapping types.

Prestige 650H-E

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