DWR-921 4G LTE Router
User Manual
Configuring via Web-based Interface
Parameter Description
IPsec (for the L2TP over IPsec type)
Pre-shared key
A key for mutual authentication of the parties. Click the Show icon
( ) to display the entered key.
Enable PFS
Move the switch to the right to enable the PFS option (Perfect
Forward Secrecy). If the switch is moved to the right, a new
encryption key exchange will be used upon establishing the IPsec
tunnel. This option enhances the security level of data transfer, but
increases the load on DWR-921.
Enable DPD
Move the switch to the right to enable using DPD protocol for this
tunnel. Such a setting allows to check the status of the remote host:
if encrypted packets exchange between the router and the remote
host breaks down, the router starts sending DPD messages to the
remote host. If the switch is moved to to the left, the DPD delay
and DPD timeout fields are not available for editing.
DPD delay
A time period (in seconds) between DPD messages. By default, the
value 30 is specified.
DPD timeout
A waiting period for the response to a DPD message (in seconds). If
the host does not answer in the specified time, the router breaks
down the tunnel connection, updates information on it, and tries to
reestablish the connection. By default, the value 120 is specified.
Specify connection
port
Move the switch to the right to change the port used for data
exchange with the other party enter the needed value in the Port
field displayed. By default, the value 1701 is specified.
When all needed settings are configured, click the APPLY button.
After clicking the button, the window for additional configuration of the connection opens.
If you want to use this WAN connection to access the Internet, select the to the Internet choice of
the radio button. Then select an existing connection which will be used to access the PPTP/L2TP
server and click the CONTINUE button; or select the create a new connection choice of the
radio button and click the CREATE CONNECTION button.
If you have already configured the connection to the Internet and you want to use this WAN
connection only to connect to the virtual private network, select the to the virtual private
network choice of the radio button and click the CONTINUE button.
After creating a connection of the L2TP over IPsec type, on the VPN / IPsec page, in the Status
section, the current state of the IPsec tunnel is displayed.
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Weight and Dimensions
