D-Link DFL-80 User Manual - Page 136

Set new Internal IP Address enterprise's private IP address

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restart the computer to activate new IP address. Run Browser and enter http://192.168.1.1 in URL field to access Firewall WebUI. Step 2: Browser will ask or the user's name and password enter 'admin' and password. Step 3: Then WebUI will request the user to change password. Change it and record the new password. The user name is still 'admin'. Step 4: Set new Internal IP Address (enterprise's private IP address) and External IP Address (allocated by ISP provider). Step 5: If the new Internal IP Address doesn't belong to 192.168.1.0 network, such as 172.16.0.1, the administrator needs to change the Firewall's IP address to 172.16.0.1,or other IP address of the same network and restart the computer to activate new IP address. After the new IP address is activated, use browser to access http://172.16.0.1. Step 6: Enter the main window of administration policies under WebUI, click New Policy, go to Add New Policy window, click OK to complete the installation process. Q : In the Outgoing menu, I set the source address to "Inside-Any", the destination address to "Outside-any", the service to HTTP, and the action to Permit. Why do the computers of the internal network still cannot access the Internet? A: Usually the DNS of the clients point to the DNS server outside of the firewall. When converting a URL to IP address, the browser sends out DNS service packet to the external DNS server. If the firewall doesn't allow DNS service packet to pass, the URL cannot be mapped to the IP address and the connection fails. Q : Why can't users of external networks still store data into virtual server when virtual server or IP mapping has been set successfully? A : In order to open a virtual server to external networks, Administrator needs to make sure, in the Incoming menu, there is a policy of source address pointing to external IP address, destination address to the virtual server or Mapped IP and with permission to allow inward packets to pass through. 136

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136
restart the computer to activate new IP address. Run Browser
and enter
in URL field to access Firewall
WebUI.
Step
2
:
Browser will ask or the user’s name and password enter
‘admin’ and password.
Step
3
:
Then WebUI will request the user to change password. Change
it and record the new password. The user name is still ‘admin’.
Step
4
:
Set new Internal IP Address (enterprise’s private IP address)
and External IP Address (allocated by ISP provider).
Step
5
:
If the new Internal IP Address doesn’t belong to 192.168.1.0
network, such as 172.16.0.1, the administrator needs to
change the Firewall’s IP address to 172.16.0.1,or other IP
address of the same network and restart the computer to
activate new IP address. After the new IP address is activated,
use browser to access
.
Step
6
:
Enter the main window of administration policies under WebUI,
click New Policy, go to Add New Policy window, click OK to
complete the installation process.
Q :
In the Outgoing menu, I set the source address to “Inside-Any”, the
destination address to “Outside-any”, the service to HTTP, and the action
to Permit. Why do the computers of the internal network still cannot
access the Internet?
A :
Usually the DNS of the clients point to the DNS server outside of the
firewall. When converting a URL to IP address, the browser sends out
DNS service packet to the external DNS server. If the firewall doesn’t
allow DNS service packet to pass, the URL cannot be mapped to the IP
address and the connection fails.
Q :
Why can’t users of external networks still store data into virtual server
when virtual server or IP mapping has been set successfully?
A :
In order to open a virtual server to external networks, Administrator needs
to make sure, in the Incoming menu, there is a policy of source address
pointing to external IP address, destination address to the virtual server
or Mapped IP and with permission to allow inward packets to pass
through.