User`s manual

User's Manual
Arctic IEC-104 Gateway
Firmware Version 5.0.9 33 Document Version 1.5
5.2.8 Routing
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.
5.2.11 DNS Update
These parameters are used to configure dynamic DNS. Arctic can report its
dynamic IP address to a DNS server.
The DNS Update settings are RFC2136 compliant, for example BIND DNS
server.