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VoIP/(802.11g) ADSL2+ (VPN) Firewall Router
Chapter 4: Configuration
automatically re-establish the PPPoE session when disconnected by the ISP.
Connect on Demand: If you want to establish a PPPoE session only when there is a packet
requesting access to the Internet (i.e. when a program on your computer attempts to access the
Internet).
Idle Timeout: Auto-disconnect the broadband firewall gateway when there is no activity on the line for a
predetermined period of time.
Detail: You can define the destination port and packet type (TCP/UDP) without checking by
timer. It allows you to set which outgoing traffic will not trigger and reset the idle timer.
RIP: RIP v1, RIP v2, and RIP v2 Multicast. Check to enable RIP function.
MTU: Maximum Transmission Unit. The size of the largest datagram (excluding media-specific headers)
that IP will attempt to send through the interface.
TCP MSS Clamp: This option helps to discover the optimal MTU size automatically. Default is enabled.
Advanced Options (PPPoE)
LLC Header: Selects encapsulation mode, true for using LLC or false for using VC-Mux.
Create Route: This setting specifies whether a route is added to the system after IPCP (Internet Protocol
Control Protocol) negotiation is completed. If set to enabled, a route will be created which directs packets
to the remote end of the PPP link.
Specific Route: Specifies whether the route created when a PPP link comes up is a specific or default
route. If set to enabled, the route created will only apply to packets for the subnet at the remote end of the
PPP link. The address of this subnet is obtained during IPCP negotiation.
Subnet Mask: sets the subnet mask used for the local IP interface connected to the PPP transport. If the
value 0.0.0.0 is supplied, the netmask will be calculated from the class of the IP address obtained during
IPCP negotiation.
Route Mask: Sets the subnet mask used by the route that is created when a PPP link comes up. If it is
set to 0.0.0.0, the subnet mask is determined by the IP address of the remote end of the link. The class of
the IP address is obtained during IPCP (Internet Protocol Control Protocol) negotiation.
MRU: Maximum Receive Unit. This is negotiated during the LCP protocol stage.
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