D-Link DFL-900 User Manual page 37

NAT
Step 3 ¡ Ð Switch the NAT Mode
Select the Full Feature from the list of
Network Address Translation Mode. Click
Apply. After applying the setting, the page will
highlight a warning saying that the rules are no
more automatically maintained by the DFL-900. If
you change the LAN/DMZ IP settings, you have
to manually update related rules by yourself.
Otherwise, hosts in your LAN/DMZ cannot
establish connections to the hosts in the WAN
side.
Step 4 ¡ Ð Customize NAT Rules
In the full-feature mode, the rules can be further
customized. Incoming packets from LAN/DMZ
zones are top-down matched by the NAT rules.
Namely, NAT implements first match. Select the
rule item that you want to do with: insert a new
rule before it; delete it; move it before the
list-box chosen item.
Step 5 ¡ Ð Insert NAT Rule
Step 5.a ¡ X Insert an Many-to-One
Rule
As described in the above, Many-to-One NAT is
the default NAT rule type in the Basic mode. If
you have other alias LAN/DMZ subnets, you can
manually add a Many-to-One NAT rule for them.
First select the Type as Many-to-One, check the
Activate this rule, enter a Rule name for
this rule, enter the private-IP subnet (an IP
address with a netmask) to be translated, and
enter the public IP address for being translated
into, You can check the Auto choose IP from
WAN ports. The DFL-900 will automatically
determine which WAN IP is to be translated into.
Activate this rule
Status
Condition Source IP / Netmask
ADVANCED SETTINGS > NAT > Status
ADVANCED SETTINGS > NAT > NAT Rules
ADVANCED SETTINGS > NAT > NAT Rules > Insert
FIELD
The NAT rule is enabled or not
Rule name The NAT rule name
Compared with the incoming packets, whether Source
IP/Netmask is matched or not.
DESCRIPTION
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DFL-900 User Manual
EXAMPLE
enabled
Rule
192.168.40.0 /
255.255.255.0