Nat/Pat - Planet GRT-101 User Manual

PLANET Technology Corp. GRT-101 User's Manual
the system will automatically select only one entry to be the default route
among these entries with resolvable gateway.
Note: For most WAN protocols, a valid default route with resolvable gateway on WAN side must be set to work prop-
erly. However, for PPP connections, GRT-101 will add default route to ISP gateway automatically, and hence it is
unnecessary to add a default route manually.
To enable RIP updating with auto summary for routing table, type:
admin# setup route rip generic Enable Enable
For detailed configuration about RIPv1/RIPv2, please refer to the on-line help
message by the following commands:
admin# setup route rip lan 1
admin# setup route rip wan 1
Note: Each WAN port could be configured independently for RIPv1/RIPv2 updating of routing table.
To show the configuration, use the list command:
admin# setup route rip list
To save your changes, enter:
admin# write

3.11.3 NAT/PAT

NAT can be used to share an Internet connection, to reduce the requirement
for publicly assigned IP addresses, to expand an existing network without af-
fecting existing IP based account schemes, and to hide an internal network
schema from public networks.
It is often used in the situation where only one IP address could be assigned
for the network, such as a PPP connection to an local ISP, e.g., when your
local ISP uses protocols of "PPPoA" or "PPPoE" over the ATM VC, you get a
dynamic public IP at the WAN port from your local ISP. All requests originating
from the LAN (private network) have their source IP addresses replaced with
the public IP address. Only one IP address is visible from the public network.
To setup this GRT-101 working for the above example, enter:
admin# setup lan 1 attrib Virtual
Also, make sure to delete all entries in the NAT/PAT IP pools by the following
commands:
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