Configure Settings - ZyXEL Communications WAH7601 User Manual

The following table summarizes how these NAT types handle outgoing and incoming packets.
Table 22 NAT Types
Incoming
Packets
Outgoing
Packets

10.2 Configure Settings

Use this screen to enable NAT and enable/disable he ALGs (Application Layer Gateways) in the
WAH7601. Click Configuration > Security > NAT to open the Configure screen.
Figure 43 Configuration > Security > NAT > Configure
The following table describes the labels in this screen.
Table 23 Configuration > Security > NAT > General
LABEL
NAT Type
IPSEC VPN Pass
Through
PPTP VPN Pass
Through
L2TP VPN Pass
Through
Chapter 10 NAT
ADDRESS
FULL CONE
RESTRICTED
Any external host Only external hosts
can send packets to with an IP address to
the mapped which the internal
external IP address host has already
and port. sent a packet can
send packets to the
mapped external IP
address and port.
The NAT router maps the internal IP address and port of all outgoing
packets to a single IP address and port on the external network.
DESCRIPTION
Select the NAT type for the WAH7601. For more information see
Enable this to turn on the IPsec ALG (Application Layer Gateway) on the WAH7601 to detect
IPsec traffic and help build IPsec sessions through the WAH7601's NAT.
Enable this to turn on the PPTP ALG on the WAH7601 to detect PPTP traffic and help build
PPTP sessions through the WAH7601's NAT.
Enable this to turn on the L2TP ALG on the WAH7601 to detect L2TP traffic and help build
L2TP sessions through the WAH7601's NAT.
WAH7601 User's Guide
PORT RESTRICTED
Only external hosts
with an IP address
and port to which the
internal host has
already sent a packet
can send packets to
the mapped external
IP address and port.
64
SYMMETRIC
A host on the external
network can only send
packets to the specific
mapped external IP
address and port that the
NAT router used in sending
a packet to the external
host's IP address and port.
The NAT router maps the
internal IP address and
port of each outgoing
packet to a different
external IP address and
port for each different
destination IP address and
port.
Table 22 on page 64.