Static And Dynamic Ip Addressing; Software Firewall Configuration; Data Security And Encryption - Linksys E2500 Configuration Manual

Linksys® E2500 Wireless-N Router Configuration Guide
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N2KView must then be set up to request a connection to the WAN IP Address of the router
and the new port number.
A.5 Static and Dynamic IP Addressing
If you wish to use N2KView
connection, please read this section. If your N2KServer
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 an N2KServer
connection, you have two choices. First, you can request a static IP address from the ISP for
your vessel; secondly, you may register your N2KServer
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.
A.6 Software Firewall Configuration
If you wish to run N2KView
software firewall product other than Windows Firewall, please read this section. Otherwise,
you may skip this section.
A firewall is designed to protect your computer from unfettered access from the Internet.
There are two kinds of firewalls: software and hardware. A software firewall is a component
such as Windows Firewall or Norton Internet Security. A major function of these programs is to
allow your computer to initiate connections out onto the Internet, but to block your computer
from receiving incoming connections from the Internet. If you wish to be able to view your
vessel's data from another computer, your N2KServer
configured to allow incoming connections from N2KView
these adjustments to the Windows Firewall software when it is installed. If you are running
firewall software from another vendor, you may have to configure your firewall software to
allow this incoming TCP protocol connection on port 6544.
A.7 Data Security and Encryption
Making your vessel's data available over local networks or the internet 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
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to view data from an N2KServer
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from outside your vessel's LAN via an Internet
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and N2KServer on two separate computers and are running a
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on a WAN through an Internet
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and N2KView
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's IP address with a "dynamic DNS
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computer's software firewall must be
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stations. The N2KServer
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network.
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computers are on the
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makes
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