Troubleshooting FAQs
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General administration
Q: I am trying to set up some of the firewall options, but it keeps asking me for a password while I
work.
Increase the web-based manager idle timeout. See
Changing web-based manager options
.
Q: Administration from the Internet does not work.
Configure management access for the external, interface. See
Configuring the external interface
.
Q: Everyone in the world knows the password.
Change the administrator password. See
Adding and editing administrator accounts
Q: I have the DFL-500 configured the way I want it. Is there some way to save the configuration before
making any more changes?
.
Q: How can I get a warning when someone is attacking my network?
Network Intrusion detection system (NIDS)
Network configuration
Q: I am trying to set up the network connections, but I can't seem to ping the firewall.
Configure the interface to respond to pings. See
Configuring the internal interface
.
Firewall policies
Q: When I set policies, all the computers on the network seem to be affected. The policy for a single
machine is being applied to the entire network.
When adding the address of a single computer remember to change the netmask from 255.255.255.0 to
255.255.255.255.
Q: My policies are set correctly, but I still cannot connect to the Internet from one or more of the
computers on my internal network.
Check the default gateway setting on that particular computer. Its default gateway must match the internal
address of the DFL-500.
Q: I checked the default gateway and it matches, but I still cannot connect to the Internet.
DFL-500 User Manual
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