Digi IX40 User Manual page 505

Virtual Private Networks (VPN)
5. Set the IPv4 address of the NEMO home agent. This is provided by your cellular carrier.
(config vpn nemo nemo_example)> home_agent IPv4_address
(config vpn nemo nemo_example)>
6. Set the key used to authenticate to the home agent. This is provided by your cellular carrier.
(config vpn nemo nemo_example)> key value
(config vpn nemo nemo_example)>
7. Set the the number of seconds number of seconds until the authorization key expires. This is
provided by your cellular carrier.
(config vpn nemo nemo_example)> lifetime integer
(config vpn nemo nemo_example)>
Allowed values are any integer between 1 and 65535.
8. MTU discovery is enabled by default, which allows the device to determine the maximum
transmission unit (MTU) size. To disable:
(config vpn nemo nemo_example)> mtu_discovery false
(config vpn nemo nemo_example)>
If disabled, set the MTU size. The default MTU size for LANs on the IX40 device is 1500. The MTU
size of the NEMO tunnel will be smaller, to take into account the required headers.
(config vpn nemo nemo_example)> mtu integer
(config vpn nemo nemo_example)>
Allowed values are any integer between 68 and 1476.
9. Set the Security Parameter Index (SPI) value, which is used in the authentication extension
when registering. This should be normally left at the default setting of 256 unless your service
provider indicates a different value.
(config vpn nemo nemo_example)> spi integer
(config vpn nemo nemo_example)>
Allowed values are any integer between 256 and 4294967295.
10. Set the firewall zone for the NEMO tunnel to internal:
(config vpn nemo nemo_example)> zone internal
(config vpn nemo nemo_example)>
The Internal firewall zone configures the IX40 device to trust traffic going to the tunnel and
allows it through the network.
11. Configure the Care-of-Address, the local WAN interface of the internet facing network.
a. Set the method to determine the Care-of-Address:
(config vpn nemo nemo_example)> coaddress type value
(config vpn nemo nemo_example)>
where value is one of:
IX40 User Guide
NEMO
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