Maretron VDR100 User Manual page 9

1.6.3.2 PAT (Port Address Translation)
If you wish to use N2KExtractor
connection and your Internet Service Provider does not allow communication on port 6544,
please read this section. If your
or your ISP allows communication over port 6544, you may skip this section.
The VDR100 requires a connection to be made on port 6544. Routers that support Port
Address Translation can be set up to accept incoming connections on a different port and to
forward these connections to port 6544 on the IP address of the VDR100. This change in the
port address is known as the ability to do Port Address Translation as well as Network Address
Translation. Not all routers have this ability; please consult the documentation that came with
your router for details.
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N2KExtractor must then be set up to request a connection to the WAN IP Address of the
router and the new port number.
1.6.3.3 Static and Dynamic IP Addressing
If you wish to use N2KExtractor
connection, please read this section. If your VDR100 and your
on the same LAN, you may skip this section.
If you request a Static IP Address from your ISP when you set up your Internet connection, the
WAN IP address will always be the same. If you didn't make this request, your ISP will assign
you a Dynamic IP Address, which may actually change from time to time. In this way, the ISP
only needs to have enough addresses to cover its customers who are connected to the
Internet at any given time. If you stop or lose your Internet connection, your Dynamic IP
address will be released and may be reassigned to someone else.
If you wish to connect to a VDR100 from outside your vessel's LAN via an Internet connection,
you have two choices. First, you can request a static IP address from the ISP for your vessel;
secondly, you may register your VDR100's IP address with a "dynamic DNS service", such as
the ones offered freely by www.dyndns.org, among others. Please visit their websites for more
information on how dynamic DNS services operate.
1.6.3.4 Data Security and Encryption
Making your vessel's data available over a LAN or WAN presents multiple security concerns.
First, it is desirable to keep anyone from viewing your vessel's data without authorization.
Second, and more important, it is imperative that no unauthorized persons be able to place
data onto your vessel's NMEA 2000
The VDR100 protects your vessel's data with multiple levels of protection.
First, any data that passes between the VDR100 and any
is protected using industry-standard SSL encryption. This encryption standard is widely used
to protect financial information on the internet. Each communication session negotiates a
random encryption key every time a connection is established. This makes the data secure
over public and private Wi-Fi networks, as well as the internet.
Revision 1.2
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to view data from a VDR100 on a WAN through an Internet
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N2KExtractor computer and VDR100 are on the same LAN,
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to view data from a VDR100 on a WAN through an Internet
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network.
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N2KExtractor
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N2KExtractor station components
computer are
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