Nortel BCM 3.7, Manual

Page: 741 / 1004

Configuring an Interface with NAT 741
Programming Operations Guide
4 Click the Save button.
Modifying a Rule to an Interface
1 Click the Rule Setting tab.
The Rule Setting screen appears.
2 Click the rule you want to modify.
3
On the Configuration menu, click Modify Rule .
The Rule Setting dialog box appears.
4 Modify the Rule settings.
5 Click the Save button.
Public IP Type Allows you to specify if the IP type is Fixed or Dynamic .
Use Dynamic when the IP is assigned by an outside source. For example, your Internet Service
Provider (ISP) assigns your IP address. If you specify Dynamic, Public IP and Public Mask do not
need to be entered.
The default is Fixed .
Note : Dynamic does not match all IP addresses. If you want to match all IP addresses, enter an
IP address of 0.0.0.0 and a mask of 0.0.0.0.
Public IP Allows you to specify the Public IP address.
This address should be on the outside network.
Note : If you may want to use an address from the internal network, refer to “Configuring NAT to
change the source IP address used for WAN traffic” on page 742 .
Public Range
Mask Allows you to specify the mask to use with the Public IP.
If you want the Rule to apply to a single Public IP address (the Public IP entered), enter
255.255.255.255.
If you want the Rule to apply to all Public IP addresses, enter 0.0.0.0.
Public Port
Range (#-#) Allows you to specify a single entry, a range of entries (1-65535) or one of the following; ALL ,
FTP , Telnet , SMTP , SNMP , SNMP-TRAP , DNS , TFTP , Gopher , Finger , H.323 , HTTP , POP3 ,
NNTP , RPC , SUNNFS , and UNISTIM .
Note: If you do not configure the public and private masks correctly, mappings to
non-existent systems can occur. You must specify addresses that exist. For example, if
you configure an outbound rule, the Public IP address and Public Mask are the translated
addresses. These addresses must be assigned or packets will be sent to a non-existent
destination. For inbound rules, the translated address is the Private Address and Mask.
If you want the rule to apply to one IP address only, you must enter a Mask of
255.255.255.255. If you enter any other Mask, the rule will apply to more than one IP
address.
Table 215 NAT Rule Settings (Continued)
Attribute Description