User guide

Pre-connection checklist 78
4-4 Using RGS through a firewall
New at RGS 5.1.5 is the ability for the Receiver to use the public IP address of the Sender. This feature has been
added to allow RGS to be used through a firewall. To take advantage of this feature, the Sender and Receiver
firewalls must both support NAT (Network Address Translation). In addition, the Sender firewall must support port
forwarding (see Figure 4-7).
Figure 4-7 RGS operation through a firewall
Sender
Receiver
Internet
Firewall
NAT-enabled
router
source IP: port dest IP: port
Firewall
NAT-enabled
router
192.168.0.10 : 42966
192.168.0.10 : 42966
source IP: port dest IP: port
192.168.0.1 : 543
source IP: port dest IP: port
15.2.A.B : 543
source IP: port dest IP: port
192.168.0.1 : 678
source IP: port dest IP: port
192.168.0.5 : 3279
source IP: port dest IP: port
15.2.C.D : 678
192.168.0. 5 : 3279
15.2.A.B : 42966
192.168.0.1 : 678
15.2.A.B
15.2.A.B : 42966
192.168.0.10 : 42966
192.168.0.5 : 327915.2.C.D:678
15.2.C.D
192.168.0.1
NAT
192.168.0.1
NAT
Port
Forwarding
Firewalls can change the source
port numbers (examples shown)
New at RGS 5.1.5 is the ability for the Receiver
to use the public IP address
of the Sender
This port number
can vary.
Public IP
addresses