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64200600L1#T-31A © 2002, ADTRAN, Inc. Page 49
Total Access 600R User Interface Guide (UIG)
NAT
The Total Access 600R can perform Network Address Translation. This feature is most widely used
when connecting to the Internet. The Ethernet network can consist of private network numbers.
When this profile is connected, all IP addresses on the Ethernet side are translated into the one real IP
address. Multiple stations on the Ethernet side can access the Internet simultaneously.
.
IARP
When this is set to Yes, the Total Access 600R will send In-
verse ARP packets to determine the IP address on the other
end of the virtual circuit. If the IARP is responded to, a route
is placed in the IP route table. A setting of No (default)
means that the route address is to be assigned statically using
the IP M
AP
/F
AR
-E
ND
IP A
DDRESS
parameter. The Total
Access 600R will always respond to Inverse ARP requests.
F
AR
-E
ND
IP A
DDRESS
This is the IP address of the device on the other end of the vir-
tual circuit. When this DLCI becomes active, the Total Ac-
cess 600R will add a route in the IP routing table. Default is
0.0.0.0.
IP N
ETMASK
The IP network mask to apply to the F
AR
-E
ND
IP A
DDRESS
and L
INK
IP A
DDRESS
is specified here. Default is 0.0.0.0.
LOCAL IP ADDRESS
The virtual circuit may require an IP address to be specified
at this DLCI interface. This is called a numbered interface.
This address is used by the Total Access 600R to respond to
Inverse ARP requests. If this IP address is left as 0.0.0.0, the
link is treated as unnumbered and the 600R responds to the
Inverse ARP with its Ethernet IP address. Default is 0.0.0.0.
P
ORT
T
RANSLATION
By enabling port translation, IP packets are modified as they pass
through this interface. During transmission, private addresses are
translated into a single public (NAPT) IP address. Incoming
packets are translated from the public to private address based on
the protocol port numbers. Once enabled, you must set up NAT
for use. Default is D
ISABLED
. When disabled, the unit will route
across the connection normally.
P
UBLIC
IP A
DDRESS
M
ODE
This option is only available when
NAT P
ORT
T
RANSLATION
is en-
abled. The port translation requires at least a single real IP ad-
dress for translating. This value can use the IP assigned to the
interface (or assigned via layer 2 protocol like PPP), obtained
using DHCP client, or statically specified on this menu. If the ad-
dress cannot be learned, then it must be specified in order for the
translation to work. Choices are I
NTERFACE
, S
PECIFIED
, and
DHCP C
LIENT
. Default is I
NTERFACE
.
P
UBLIC
IP A
DDRESS
This is the specified address used for the NAT. This option is only
available when
NAT P
ORT
T
RANSLATION
is enabled and the
P
UBLIC
IP A
DDRESS
M
ODE
is set to S
PECIFIED
. Default is
0.0.0.0
.