User's Manual

Configuring the Firewall
Configuring Firewall Rules
Cisco RV 120W Administration Guide 83
4
•
Minimize-Cost
—Choose this option when data must be transferred over a
link that has a lower “cost.” The IP packets for services with this priority are
marked with a TOS value of 2.
•
Maximize-Reliability
—Choose this option when data needs to travel to the
destination over a reliable link and with little or no retransmission. The IP
packets for services with this priority are marked with a TOS value of 4.
•
Maximize-Throughput
—Choose this option when the volume of data
transferred during an interval is important even if the latency over the link is
high. The IP packets for services with this priority are marked with a TOS
value of 8.
•
Minimize-Delay
—Choose this option when the time required (latency) for
the packet to reach the destination must be low. The IP packets for services
with this priority are marked with a TOS value of 16.
STEP 11 When the traffic is coming from the WAN to the DMZ or the LAN, Destination
Network Address Translation maps a public IP address (your Dedicated WAN
address, Optional WAN address, or another address) to an IP address on your
private network. Enter the following:
•
Send to Local Server (DNAT IP)
—Specify an IP address of a machine on the
Local Network which is hosting the server.
• (Optional) Check the E
Enable Port Forwarding
box to enable port forwarding
to the port that you specify in the Translate Port Number field. This will allow
traffic from the Internet to reach the appropriate LAN port via a port
forwarding rule.
•
Translate Port Number
—Enter the port number to use for port forwarding.
For example, if a machine on the Local Network side is running a telnet
server on port 2000, then check the E
Enable Port Forwarding
box and enter
2000 in the Translate Port Number field. If the server is listening on the
default port 23, then the box can be left unchecked.
•
Internet Destination Address
—Select the public IP address that is used for
this firewall rule: Dedicated WAN, Optional WAN, or Other. If you choose
Other, enter the WAN IP address that will map to the internal server in the
Other IP Address field.