Configuration
32 von 105
SINAUT MD740-1
File 3172AD001_V1_1_060206.doc
File saved
06.02.2006
File printed
06.02.2006
State Freigabe
Autor Pauluhn
Firewall
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NAT
This lists the fixed rules for NAT (
N
etwork
A
ddress
T
ranslation) 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.