SIP-2
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USER GUIDE - Rev. 3 (January 2018)
5.10
NAT CONFIGURATION
This feature is used when the SIP-2 operates as a router.
NAT is the IP address translation service which allows users to combine the use of private
IP address without this preventing them from accessing resources with a public IP address,
or preserve the address schema in different interconnected network areas.
The NAT menu defines the rules that allow IP addresses to be selectively translated and
change the transmission service ports.
It is important to bear in mind that the NAT service has a
default rule.
The correct operation of services based on its operation in analysing data which can
be changed by the NAT rules could be altered by the presence of this default rule,
since the services have a specific order of execution.
If not using NAT, you should eliminate this default rule.
FIGURE 36
NAT
configuration page
The configuration parameters are:
•
Origin
. This establishes a range of IP addresses. It admits the value
any
, in the
case that the
origin
IP address is not relevant.
•
Destination
. This establishes a range of IP addresses. It admits the value
any
, in
the case that the IP
destination
address is not relevant.
•
Service
. This establishes conditions related to service, understood as the protocol
(
tcp/udp/icmp)
and port (1 to 65535 or a range). It admits the value
any
, in the
case that the service is not relevant. Example: tcp or tcp:23 or udp:5001-5005.
•
Transl
.
Origin
. This establishes the IP address that must replace the
origin
IP. An
IP address may be specified or the respective interface identifier. In the case of not
wanting to change the original address, the value must be
original.
