Appendix B Trouble Shooting - D-Link DFL-900 User Manual

DFL-900/1500 User Manual
1. If the power LED of DFL-1500 is off when I turn on the power?
Ans：
Check the connection between the power adapter and DFL-1500 power cord. If this problem still exists, contact with your
sales vendor.
2. How can I configure the DFL-1500 if I forget the admin password of the DFL-1500？
Ans：
You can gather all the MAC addresses values of DFL-1500, and contact the local technical supporter. Then we will give you
an initial key. Please refer to the Section 29.8 described to reset the admin password.
3. I can't access DFL-1500 via the console port？
Ans：
Check the console line and make sure it is connected between your computer serial port and DFL-1500 Diagnostic RS-232
port. Notice whether the terminal software parameter setting as follows. No parity, 8 data bits, 1 stop bit, baud rate 9600 bps. The
terminal type is VT100.
4. I can't ping DFL-1500 WAN1 interface successfully？ Why？
Ans：
Follow below items to check if ready or not
a.
Check Basic Setup > WAN Settings > WAN1 status fields. Verify whether any data is correctly.
Check Device Status > System Status > Network Status WAN1 status is "UP". If the status is "DOWN", check if the
b.
network line is connectionless？
c.
Check System Tools > Remote Mgt. > MISC > WAN1. Verify if WAN1 port checkbox is enabled. The default enabled
port is only LAN port.
d.
Check whether virtual server rule (Dest. IP : WAN1 IP address, port : 1~65535) exists or not. If existing any virtual
server rule like this type, it will make all the connections from WAN1 port outside relay to another server. Actually
what you have pinged is another server, not DFL-1500.
e.
Check whether NAT One-to-One(bidirectional) rule (Translated Src IP : WAN1 IP address, port : 1~65535) exists or
not. If existing any virtual server rule like this type, it will make all the connections from WAN1 port outside relay to
another server. Actually what you have pinged is another server, not DFL-1500.
f.
If all the above items have checked, try to change a new network line. This is almost resulting from the network line
problem. Please neglect the LED status, because it will confuse your judgment sometimes.
5. I have already set the WAN1 ip address of DFL-1500 the same subnet with my pc, but I can't use https to login DFL-1500 via
WAN1 port from my pc all the time, why？
Ans：
a.
Be sure that you can ping the WAN1 port, please check the procedure as question 4 description.
b.
Make sure that the WAN1 IP address of DFL-1500 is not duplicated with other existent IP address. You can take off the
network line connected on the WAN1 port. Then try to ping the IP address which setup on the WAN1 port. If it is still
successful, the IP address which setup on the WAN1 port is duplicated with the existent IP address.
c.
Notice that you must check System Tools > Remote Mgt. > HTTPS > WAN1. The default enabled port is only LAN
port.
I can't build the VPN – IPSec connection with another device at the another side all the time, why？
6.
Trouble Shooting
241
Appendix B
Trouble Shooting
Appendix B