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from the same internal IP address and port are mapped to the same external IP address and port.
Furthermore, any external host can send a packet to the internal host, by sending a packet to the
mapped external address.
Note:
In PPPoE connection, NAT is enabled by default, you can determine whether to enable
Fullcone NAT or disable Fullcone NAT and only use NAT, the default NAT type is Port Restricted
cone NAT. Of Port-Restricted cone NAT, the restriction includes port numbers. Specifically, an
external host can send a packet, with source IP address X and source port P, to the internal host
only if the internal host had previously sent a packet to IP address X and port P
IPv4 Address: Select whether to set static IPv4 address or obtain automatically.
IP Address: If Static is enabled in the above field, enter the static IPv4 address get from the ISP.
Dial on demand: It is a parameter to let users to dial for connection to internet themselves. It is
useful when saving internet fees.
Inactivity Timeout: The set Inactivity timeout period, unit: minutes. It is combined use with Dial on
Demand, users should specify the concrete time interval for dial on demand.
IPv6 for this service: Enable to use IPv6 service.
IPv6 Address: Select whether to set static IPv6 address or obtain automatically.
IP Address: If Static is enabled in the above field, enter the static IPv4 address.
MTU: Maximum Transmission Unit, the size of the largest datagram (excluding media-specific
headers) that IP will attempt to send through the interface.
PPPoE with Pass-through: Enable or disable PPPoE pass-through. If it is enabled, PCs behind the
router can dial itself.
IGMP Multicast Proxy: Check whether to enable this feature. IGMP (Internet Group Management
Protocol) Proxy intercepts the IGMP request from Clients and set up the multicast-forwarding table,
it takes over some of the router's job, simplifying the router's job and multicast communication.
IGMP Multicast Source: Enable to support the "source filtering" which is the ability for a system to
report interest in receiving packets "only " from specific source address(es), or "all but" specific
source address(es), sent to a particular multicast address.
Note:
It works only on IGMP version 3.
MLD Multicast Proxy: check whether to enable this function. MLD (Multicast Listener Discovery
Protocol) Proxy intercepts the MLD request from Clients a set up the multicast-forwarding table. it
takes over some of the router's job, simplifying the router's job and multicast communication.
Support MLDv1 and MLDv2.
MLD Multicast Source: Used in a similar way by IPv6 system as IGMP Multicast source in IPv4
system. Enable it to support the source filtering functionality for IPv6 system.
Note:
It works only on
MLD version 2.
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