B&B Electronics RT3G-300_310_320_330_340-W - Configuration Manual - Manual (Page 34)

B&B Electronics, Inc. SPECTRE Configuration Manual
34
SPECTRE_Configuration_Manual_2912m
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1.13. NAT configuration
NAT (Network address Translation / Port address Translation - PAT) is a method of
sharing a single external IP address among many internal hosts. It also helps prevent
unauthorized access to the internal network. To enter the Network Address Translation
configuration, select the NAT menu item. Up to sixteen NAT rules may be defined.
Item Description
Public Port Public port
Private Port Private port
Type Protocol selection
Server IP address IP address which will be forwarded incoming data.
Table 23: NAT configuration
If you need to setup more than 16 NAT rules, insert the following statement into the
startup script:
iptables -t nat -A napt -p tcp --dport [PORT_PUBLIC] -j DNAT --to-destination
[IPADDR]:[PORT1_PRIVATE]
The IP address parameter [IPADDR] and port parameters [PORT_PUBLIC]
and [PORT1_PRIVATE] must be filled in with the desired information.
The following option can be used to route all incoming traffic from the PPP to a single
internal host address.
Item Description
Send all incoming packets
to default server Select this item to route all traffic received over the PPP
connection to a single IP address on the internal network.
Default Server Send all incoming packets to this IP address.
Table 24: Configuration of send all incoming packets
You can also specify which ports to use for access to the router using common
protocols. In most cases, the default port for each protocol should not be changed.
Item Description
Enable remote HTTP
access on port Select this option to allow access to the router using HTTP.
Enable remote
HTTPS access on
port Select this option to allow access to the router using HTTPS.
Enable remote FTP
access on port Select this option to allow access to the router using FTP.
Enable remote SSH
access on port Select this option to allow access to the router using SSH.
Enable remote Telnet
access on port Select this option to allow access to the router using Telnet.
Enable remote SNMP
access on port Select this option to allow access to the router using SNMP.
Masquerade outgoing
packets Select this option to turn on NAT.
Table 25: Remote access configuration