ZyXEL P-663H-51 Guia Do Utilizador
Chapter 5 WAN Setup
P-663H-51 User’s Guide
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5.8 NAT
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 to a different IP address known within another network.
host in a packet, for example, the source address of an outgoing packet, used within one
network to a different IP address known within another network.
5.9 Nailed-Up Connection (PPP)
A nailed-up connection is a dial-up line where the connection is always up regardless of traffic
demand. The ZyXEL Device does two things when you specify a nailed-up connection. The
first is that idle timeout is disabled. The second is that the ZyXEL Device will try to bring up
the connection when turned on and whenever the connection is down. A nailed-up connection
can be very expensive for obvious reasons.
demand. The ZyXEL Device does two things when you specify a nailed-up connection. The
first is that idle timeout is disabled. The second is that the ZyXEL Device will try to bring up
the connection when turned on and whenever the connection is down. A nailed-up connection
can be very expensive for obvious reasons.
Do not specify a nailed-up connection unless your telephone company offers flat-rate service
or you need a constant connection and the cost is of no concern
or you need a constant connection and the cost is of no concern
5.10 PPPoA WAN Connection Setup
When you select PPPoA in the second WAN setup add (or edit) screen, this screen displays
next. Use this screen to configure PPPoA connection settings.
next. Use this screen to configure PPPoA connection settings.
Figure 25 Advanced Setup > WAN > Add (3: PPPoA)