Siemens SINAUT MD740-1 User Manual page 32

Configuration
Firewall # # # # NAT
32 von 105
This lists the fixed rules for NAT (Network Address Translation) and
allows rules to be set or deleted.
For outgoing data packets the device can translate the given
sender IP addresses from its internal network to its own external
address, a technique known as NAT (Network Address
Translation).
This method is used when the internal addresses cannot or should
not be routed, e.g. because a private address range such as
192.168.x.x or the internal network structure is to be hidden.
This method is also called IP Masquerading.
!
When using several static IP addresses for the external
interface, the first IP address in the list is always used for IP
Masquerading.
Default setting: NAT does not take place.
Deleting a rule
Click on Delete next to the entry concerned. Then click on OK
or Apply.
Setting a new rule
If you want to set a new rule, click on New.
Set the required rule (see below), then click on OK or Apply.
You can make the following possible entries:
From IP
0.0.0.0/0 means all addresses, i.e. all internal IP addresses are
subjected to the NAT procedure. To denote a range, use
CIDR syntax - see CIDR (Classless InterDomain Routing),
page 79.
SINAUT MD740-1