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Symptom
L2TP/IPsec
connection is
disconnected
immediately.
Communication
with the terminal
located within the
VPN destination
network cannot
be established.
In the top page
of the "Basic
configuration
page", the
message
"Connected" is
not displayed for
the PPTP tunnel
connection.
Cause
The signal quality of the
terminal is poor.
The disconnection timer of
L2TP/IPsec is set.
The keep alive setting of L2TP/
IPsec is inappropriate.
IP address has not been
acquired.
Incorrect routing information
has been configured.
Proxy ARP setting is absent.
A private IP address is
assigned by the provider.
Internet connection cannot be
established.
Communication cannot
be established with the
destination of PPTP
connection.
Remedy
Check the signal quality of the terminal,
and move to a place where signal
quality is good.
Set the disconnection timer of L2TP/
IPsec to an appropriate time.
Set the interval and count of the keep
alive of L2TP/IPsec to an appropriate
value.
In places with poor signal quality, the
response of keep alive may be lost
temporarily
Check on the terminal whether the IP
address used in the VPN destination
is acquired.
For the confirmation procedure of IP
address, refer to the manual of the
terminal.
Configure the correct destination
LAN network address for the routing
information.
Run the proxy ARP in the VPN
destination LAN. (ip lan1 proxyarp on)
You cannot use the PPTP-related
functions in the environment where no
global IP address is assigned to the
product.
• Check whether the setting for Internet
connection has been configured.
• Troubleshoot according to the
explanation of "Q3 Internet
connection cannot be established"
(page 171).
Execute the ping command to the
destination IP address of PPTP, and
check whether a response is returned.
If no response is returned, check
whether communication is enabled in
the destination device.
FWX120 Operation Manual 175
Troubleshooting
8
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