Network Address Translation (Nat) - Yealink W60P Administrator's Manual

Administrator's Guide for W60P DECT IP Phones
The web user interface prompts the message "Import config...".
In the VPN block, select the desired value from the pull-down list of Active.
4.
Click Confirm to accept the change.
5.
A dialog box pops up to prompt that the settings will take effect after a reboot.
Click OK to reboot the phone.
6.

Network Address Translation (NAT)

Network Address Translation (NAT) is one of the technologies for solving the network problem
– the shortage of IP addresses. Many countries provide only one public IP address for the whole
company. They configure NAT to advertise the IP address for the entire network to the outside
world. This can reduce the need for a large number of public IP addresses.
Network Address Translation (NAT) is essentially a translation table that maps public IP address
and port combinations to private ones. This reduces the need for a large number of public IP
addresses. NAT ensures security since each outgoing or incoming request must first go through
a translation process.
NAT Types
Symmetrical NAT
In symmetrical NAT, the NAT router stores the address and port where the packet was sent.
Only packets coming from this address and port are forwarded back to the private address.
Full Cone NAT
In full cone NAT, all packets from a private address (e.g., iAddr: port1) to public network will be
sent through a public address (e.g., eAddr: port2). Packets coming from the address of any
server to eAddr: port2 will be forwarded back to the private address (e.g., iAddr: port1).
Address Restricted Cone NAT
Restricted cone NAT works in a similar way like full cone NAT. Apublic host (hAddr:any) can
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