149
Tr
ou
ble
sh
oo
tin
g
8
Symptom
▶
Cause
▶
Remedy
VPN communication
cannot be
established through
PPTP connection.
PPTP connection is not
established.
• Check whether the same user ID
and connect password as the PPTP
connection destination are specified.
• Check whether the correct values are
specified in the destination host name
and IP address.
Incorrect routing information has
been configured.
Configure the correct destination LAN
network address for the routing information.
The setting is not correct in the PC
connected to the destination LAN.
• Check the setting of the application
software used for communication.
• If the Firewall function is enabled in the
PC, change the Firewall setting so as not
to block packets used for communication.
In Windows 7, on the screen that appears
by clicking “Start” - “Help and Support”,
enter “Firewall” in the search field, and
carry out a search. Relevant information
is displayed. Troubleshoot according to
the instruction.
In the top page of the
“Basic configuration
page”, the message
“Communicating”
is not displayed
for the IPIP tunnel
connection.
The product is not connected to a
closed network.
Check whether the setting for connection
to a closed network has been configured.
Communication cannot be
established with the destination
of IPIP tunnel connection.
Execute the ping command to the
destination IP address of IPIP tunnel, and
check whether a response is returned. If
no response is returned, check whether
communication is enabled in the destination
device.
