User manual
Configuring your RLXIC-EV RLXIC-EV ♦ Intelligent Cellular
User Manual RadioLinx® Intelligent Cellular Ethernet Gateway for Verizon
ProSoft Technology, Inc. Page 61 of 104
March 10, 2010
Field AT Command Description
IPSec Key
Group
DH1, DH2, or DH5. Determines how the RLXIC-EV VPN
creates an SA with the VPN server. The DH (Diffie-
Hellman) key exchange protocol establishes pre-shared
keys using the phase 1 authentication. RLXIC-EV supports
three prime key lengths, including Group 1 (768 bits),
Group 2 (1,024 bits), and Group 5 (1,536 bits).
IPSec SA Life
Time
180 to 86400. Determines how long the VPN tunnel is
active in seconds. The default value is 28,800 seconds, or
8 hours.
Keep Tunnel
Alive
GRE
The RLXIC-EV can act as a Generic Routing Encapsulation (GRE) endpoint,
providing a means to encapsulate a wide variety of network layer packets inside
IP tunneling packets. With this feature, you can reconfigure IP architectures
without worrying about connectivity. GRE creates a point-to-point link between
routers on an IP network.
Field AT Command Description
VPN # Type
Tunnel Disabled or IPSec tunnel. Use this option to enable
or disable the VPN tunnel. If custom settings are used,
they will be saved and the tunnel can be disabled and re-
enabled without needing to reenter any of the settings. The
IPSec VPN employs the IKE (Internet Key Exchange)
protocol to set up a Security Association (SA) between the
RLXIC-EV and a Cisco (or Cisco compatible) enterprise
VPN server. IPSec consists of two phases to setup an SA
between peer VPNs. Phase 1 creates a secure channel
between the RLXIC-EV VPN and the enterprise VPN,
thereby enabling IKE exchanges. Phase 2 sets up the
IPSec SA that is used to securely transmit enterprise data.
For a successful configuration, all settings for the VPN
tunnel must be identical between the RLXIC-EV VPN and
the enterprise VPN server.
VPN1 Status
Disabled, Not Connected, or Connected. This indicates the
current status of the VPN connection. Use this as part of
troubleshooting a VPN connection.
VPN Gateway
Address
The IP address of the server that this client connects to.
This IP address must be open to connections from the
RLXIC-EV Box.