IPSec NAT Traversal
Overview
Cisco Small Business RV0xx Series Routers Administration Guide 184
E
NOTE Both the IPSec initiator and responder must support the mechanism for detecting
the NAT router in the path and changing to a new port, as defined in RFC 3947.
Configuration of Router A
Follow these instructions for Router A.
STEP 1 Launch the web browser for a networked computer, designated PC 1.
STEP 2 Access the configuration utility of Router A.
STEP 3 Click VPN > Gateway to Gateway in the navigation tree.
STEP 4 Enter a name in the
Tunnel Name
field.
STEP 5 For the VPN Tunnel setting, select Enable.
STEP 6 For the Local Security Gateway Type, select IP Only. The WAN IP address of
Router A will be automatically detected.
For the Local Security Group Type, select Subnet. Enter Router A’s local network
settings in the
IP Address
and
Subnet Mask
fields.
STEP 7 For the Remote Security Gateway Type, select IP Only. Enter Router B’s WAN IP
address in the
IP Address
field.
STEP 8 For the Remote Security Group Type, select Subnet. Enter Router B’s local
network settings in the
IP Address
and
Subnet Mask
fields.
STEP 9 In the IPSec Setup section, select the appropriate encryption, authentication, and
other key management settings.
STEP 10 In the
Preshared Key
field, enter a string for this key, for example, 13572468.
STEP 11 Click Advanced Settings.
STEP 12 Check the NAT Traversal box to enable this feature.
STEP 13 Click Save.
STEP 14 Proceed to the next section, Configuration of Router B, page 185.
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