44 | About the Radio
Aprisa SRi User Manual 1.1.0
One-to-One NAT Operation
The following figure describes an example of a radio network with One-to-One NAT configured at remotes
in AGRM mode including the user configuration of NAT Address Map Table and expected session table (a
detailed in / outbound session is shown for clarity of explanation, where NAT session table in SuperVisor
will show a session in one line which will include inbound / outbound transactions, session duration,
statistics, etc).
NAT Address Map Table - [Remote-1, Public Interface: RF Port]
Order
Match To…
Translate To…
Active
Public Dest IP
Address Start
Public Dest IP
Address End
Protocol Private Dest IP
Address Start
1
192.168.2.4
192.168.2.5
Any
10.10.1.2
✓
NAT Address Map Table - [Remote-2, Public Interface: RF Port ]
Order
Match To…
Translate To…
Active
Public Dest IP
Address Start
Public Dest IP
Address End
Protocol Private Dest IP
Address Start
1
192.168.2.7
192.168.2.8
Any
10.10.1.2
✓
NAT Session Table - [Remote-1]
ID In/Out
bound
Public IP
Src Addr
Public IP
Dest Addr
Protocol Private IP
Src Addr
Private IP
Dest Addr
Comments
1
In
172.16.1.1
192.168.2.3 Any
N/A
N/A
Management > Remote1
2
In
172.16.1.1
192.168.2.4 Any
172.16.1.1
10.10.1.2
SCADA Master > RTU-1
3
Out
192.168.2.4 172.16.1.1
Any
10.10.1.2
172.16.1.1
RTU-1 > SCADA Master
4
In
172.16.1.1
192.168.2.5 Any
172.16.1.1
10.10.1.3
SCADA Master > RTU-2
5
Out
192.168.2.5 172.16.1.1
Any
10.10.1.3
172.16.1.1
RTU-2 > SCADA Master
The configured NAT Address Map Table of remote-1 shows that NAT will translate public interface RF port
IP address range 192.168.2.4 - 5 to private IP address range 10.10.1.2
–
3. NAT Address Map Table of remote-
2 shows reuse of the same private IP address range where NAT will translate public IP address range
192.168.2.7 - 8 to private IP address range 10.10.1.2
–
3.
