User’s Manual
Arctic EDGE Router
27
Viola Systems Ltd.
D-NAT
These parameters are used to configure D-NAT (destination network address translation)
settings. When enabled, packets coming to defined GPRS interface port are forwarded to
local IP address.
Source IP
– D-NAT only connections coming from IP. Wildcard 0/0 means all IP addresses
are D-NATted.
Protocol
– Chooses which protocol is port forwarded. If “ANY” is chosen, other parametes
are disregarded.
Dest.port
– Chooses which GPRS interface is port forwarded to local Ethernet.
Redirect to IP
– Chooses where port forwarding is done to.
Redir. port
– Chooses which port port forwarding goes to.
For example, it Arctic GPRS ports 8000 and 10000 are needed to forwarded to device at IP
172.16.4.99, the following rules would be applied. With this configuration, the devices at
172.16.4.99 web server (TCP port 80) could be accessed with browser to Arctics GPRS IP
address. For example, if the GPRS has IP address 10.99.99.99, browser would be connected
to:
http://10.99.99.99:8000
to get access to web server running on port 80 at host
172.16.4.99.
If DNAT is needed to limited to some networks only, the Source IP can be defined in
IP/netmask bits format. For example, if DNAT should work only from network 192.168.1.0, the
Source IP would be defined to destination NAT rules as 192.168.1.0/24.
