2N 4G wireless router 2N SpeedRoute - User manual, 1898 v1.02 - Manual (Page 71)

Table of Programmable Parameters 3.2
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clients without a fixed IP address (from dial-up, e.g.). A lower security level,
however, is compensated by additional authorisation (xauth – cross authorisation).
IPsec connection is point-to-point only. If you want to interconnect three points, use
three IPsec connections, two per IPsec gateway. Or, select one central point and
connect all the other points to it. The advantage of this solution is just one tunnel per
endpoint (extension) but more tunnels at the central point. The extensions see each
other through the central point but the data flow between them loads the central line
twice – it is the so-called delta configuration. Keep this in mind while building your
network and always choose the proper method.
Caution
Setting the IPsec function is rather difficult. Therefore, we are not
going to present any precise tunnel setups but only describe the
parameters.
Refer to the dedicated IPsec HOW TO manual at www.2n.cz or on the
enclosed CD for more details.
IPsec - VPN
Definition
Select one of eight available IPsec tunnels.
Enable
Enable/disable the selected IPsec tunnel.
Connection type