D-Link DSR-500 User Manual page 64

Unified Services Router
Service: ANY means all traffic is affected by this rule. For a specific service
the drop down list has common services, or you can select a custom defined
service.
Action & Schedule: Select one of the 4 actions that this rule defines:
BLOCK always, ALLOW always, BLOCK by schedule otherwise ALLOW,
or ALLOW by schedule otherwise BLOCK. A schedule must be
preconfigured in order for it to be available in the dropdown list to assign to
this rule.
Source & Destination users: For each relevant category, select the users to which
the rule applies:
Any (all users)
Single Address (enter an IP address)
Address Range (enter the appropriate IP address range)
Log: traffic that is filtered by this rule can be logged; this requires configuring the
router's logging feature separately.
QoS Priority: Outbound rules (where To Zone = insecure WAN only) can have the
traffic marked with a QoS priority tag. Select a priority level:
Normal-Service: ToS=0 (lowest QoS)
Minimize-Cost: ToS=1
Maximize-Reliability: ToS=2
Maximize-Throughput: ToS=4
Minimize-Delay: ToS=8 (highest QoS)
6.
Inbound rules can use Destination NAT (DNAT) for managing traffic from the WAN.
Destination NAT is available when the To Zone = DMZ or secure LAN.
With an inbound allow rule you can enter the internal server address that is hosting
the selected service.
You can enable port forwarding for an incoming service specific rule (From Zone =
WAN) by selecting the appropriate checkbox. This will allow the selected service
traffic from the internet to reach the appropriate LAN port via a port forwarding
rule.
Translate Port Number: With port forwarding, the incoming traffic to be forwarded
to the port number entered here.
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User Manual