User's Manual
Arctic GPRS Gateway
Firmware Version 5.0.7 34 Document Version 1.6
Figure 22. Routing Settings
5.2.9 S-NAT
These parameters are used to configure S-NAT (source network address
translation) settings. When enabled, private IP address used in local LAN is
changed to GPRS interface IP address.
From IP – Only S-NAT connections from the defined IP address are accepted.
If defined with wildcard (0/0), all IP addresses are handled the same way (only
S-NAT connections are allowed).
5.2.10 D-NAT
These parameters are used to configure D-NAT (destination network address
translation) settings. When enabled, packets coming to define 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 forwarding goes to.
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