Cradlepoint COR IBR350 Manual page 44

• Local Port(s): The port number(s) that corresponds to the service (Web server, FTP, etc) on a local computer or device. For example, you
might input "80" in the Local Port(s) field to open a port for a Web server on a computer within your network. The Internet Port(s) field
could then also be 80, or you could choose another port number that will be used across the Internet to access your Web server. If you
choose a number other than 80 for the Internet Port, connections to that number will be mapped to 80 – and therefore the Web server –
within your network.
• Protocol: Select from the following options in the dropdown menu:
– TCP
– UDP
– TCP & UDP
• Click Submit to save your completed port forwarding rule.
Network Prefix Translation
Network Prefix Translation is used in IPv6 networks to translate one IPv6 prefix to another.
(RFC 6296) trying to achieve address independence similar to NAT in IPv4. Unlike NAT, however, NPT is stateless and preserves the IPv6 prin-
ciple that each device has a routable public address. But it still breaks any protocol embedding IPv6 addresses (e.g. IPsec) and is generally not
recommended for use by the IETF. NPT can help to keep internal network ranges consistent across various IPv6 providers, but it cannot be used
effectively in all situations.
The primary purpose for Cradlepoint's NPT implementation is for failover/failback and load balancing setups. LAN clients can potentially retain the
original IPv6 lease information and may experience a more seamless transition when WAN connectivity changes than if not utilizing NPT.
Mode:
• None – No translation is performed
• Load Balance Only – (Default) Only translate networks when actively load balancing
Figure 59: Port Forwarding Rule Add/Edit
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IPv6 prefix translation is an experimental specification