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MBR L13
–
User’s
Guide
51
Figure 67:
Add NAT/NAPT Rule
2.
Follow the example to create the required NAT/NAPT rules.
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Example 1: Translate the address
192.168.1.10 to 192.168.71.12
In this example, we assume that LAN addresses (192.168.1.X) are not yet connected. Therefore, they do not
appear as drop-down menu options, and network objects must be created in order to represent them.
1
.
Select
User Defined
in the
Source Address
drop-down menu. The
Edit Network Object
screen appears.
Figure 68:
Edit Network Object
2
.
Click
New Entry
. The
Edit Item
screen appears.
Figure 69:
Edit Item
3
.
In the
Network Object Type
drop-down menu, select
IP Address
4
.
Click
OK
to save the settings.
5
.
Click
OK
once more in the
Edit Network Object
screen.
6
.
Back in the
Add NAT/NAPT Rule
screen, in the
NAT Addresses
drop-down menu, select the
192.168.71.12
option. The screen refreshes, adding this address as a NAT IP address.
7
.
Click
OK
to save the settings. The NAT rule is displayed in the
NAT
screen.
Figure 70: NAT/NAPT Rule Sets
This rule translates one LAN IP address to one NAT IP address which means that this LAN computer will have
WAN access at all times. The status is therefore set to "Active".
Example 2: Translate the range
192.168.1.11-192.168.1.15 to 192.168.71.12-192.168.71.15
Define this NAT rule in the same manner depicted above with the exception of selecting
IP Range
(instead of
IP Address
) as the network object type. Since neither range is predefined (and therefore not found in the
drop-down menu options), network objects must be created in order to represent them. This is done with the
User Defined
option. The rule is displayed in the
NAT
screen.
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Figure 71: NAT/NAPT Rule Sets
This rule translates five new LAN IP addresses to four NAT IP addresses, which would normally mean that only
four of the five LAN computers may have WAN access at the same time. However, note that the NAT address
192.168.71.12 is already in use by the first rule. The L13 will therefore allow these five LAN computers to use
only the three remaining IP addresses: 71.13, 71.14 and 71.15. The status is set to "Active".
Example 3: Translate the range 192.168.1.21-192.168.1.25 to 192.168.71.13-192.168.71.14
1
.
Define this NAT rule in the same manner depicted above. The following attention message is displayed.
Figure 72: Attention
2
.
Click
OK
. The rule is displayed in the
NAT
screen.
Figure 73: NAT/NAPT Rule Sets
This rule translates five new LAN IP addresses to two NAT IP addresses, both of which are already in use by
the second rule. L13 is therefore unable to resolve this situation and the rule's status is set to "Error". Notice
that had this rule been defined as the second rule, all three rules would be valid. This is because the NAT
address 192.168.71.15 would still be available for rule number 1. This can easily be amended: You can use the
green arrow icons to move a rule entry up or down, changing its priority relative to the other rules. Click this
rule's
action icon once. All rules will now be set to "Active".
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Figure 74 NAT/NAPT Rule Sets
Note
: Rule number 1 now maps five LAN addresses to one NAT address. L13 subtracts all previously used NAT
addresses, requested by previous rules, from the requested NAT addresses of the current rule. The requested
range of addresses does not determine how many will be available; the number of available addresses is
determined by the previous rules configuration and order. Rules will appear as "Active" even if they only have
one usable NAT address.
Example 4: Translate the address 192.168.1.5 to 192.168.71.16 to
ports 1024-1050
1
.
Define this NAPT rule in the same manner depicted above, with the following exception:
Select the
NAPT
option in the
Operation
section drop-down menu. The screen refreshes.
Figure 75: Add NAPT Rule
2
.
Add a NAPT address by selecting the
User Defined
option.
3
.
Enter 1024-1050 as the range of ports in the
NAPT Ports
section.
4
.
Click
OK
to save the settings. The rule is displayed in the
NAT
screen.
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Figure 76: NAT/NAPT Rule Sets
This rule translates a LAN IP address to a NAT IP address with specific ports. Its status is set to "Active".
3.7.1.9
Connections (Firewall)
The connection list displays all the connections that are currently open, as well as various details and statistics. You
can set this list to close an undesired connection by clicking its
action icon. The basic display includes the name of
the protocol, the different ports it uses, and the direction in which the connection was initiated.
Figure 77: Connection List
Click
the
Advanced
button to display the following details:
The connection's time-to-live
The number of kilobytes and packets received and transmitted
The device type
The routing mode
Use the
Connections per Page
combo box to select the number of connections to display at once.
The
“Approximate Max. Connections”
value represents the number of additional concurrent connections possible.
19216811.live