D-Link DSL-500 User Manual page 45

Define these variables for each filter rule:
Select index to set
Item Name
State
Pass or Block
Interface
Protocol
Source
< specifies the port numbers less than and equal to the Start Port number
> specifies the port numbers greater than and equal to the Start Port number
= sets the port number equal to the Start Port if there is no End Port specified; if an End Port number
is specified, this defines a range of ports to filter. The range is defined as the port numbers between
the Start Port and End Port, including the Start and End Port numbers.
Start Port
End Port
Destination
To delete or modify an existing rule, select the index number and click the action button for Delete or Modify.
Clicking on the Clear button will set the variables to the blank or default setting.
Each new rule that is added will appear in the entry table at the top of the web page. When you have configured
all the rules you want to use, click on the Apply button. You can save and reboot the system now, or continue to
configure the Router.
DSL-500 ADSL Router User's Guide
When adding a new rule, choose the Not selected option from the drop-down
menu first. This will automatically assign the next available index number to the
new rule. If you are deleting or modifying an existing rule, select it and click the
appropriate button to the right.
Name filtering rule defined here.
Select Enabled to start using the static route when it is applied. To save a route
you do not want to use now for later use without deleting it you can choose
Disabled.
Choose Block to drop packets as defined by the rule. The default Pass will
route data without restriction as a normal packet.
Choose Ethernet or select a WAN interface. If you have a single PVC and have
not modified the name of the WAN interface, it appears here as ISP1 (the
default name for the WAN interface).
Select ICMP, TCP, UDP or All to pass or block packets of that protocol type.
Type in the source IP address and select the Subnet Mask to pass or block
packets form that IP address.
For a range of ports, this will be the first port in the range. For a single port
enter the port number.
For a range of ports, this will be the last port in the range. For a single port just
enter the same port number entered in Start Port.
Type in the destination IP address and select the Subnet Mask to pass or block
packets destined to that IP address.
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