Nortel 7 Configuration page 94

94 Chapter 5 Configuring the system
A host can send only enough packets to a public interface to establish a tunnel
connection. If the tunnel is not established before a preset maximum
number-of-packets-allowed counter is reached, then the packets from that host are
discarded.
Public indicates that this interface is attached to a public data network like the
Internet. The Nortel VPN Router rejects nontunneled protocols and only accepts
tunneled protocols like IPsec, PPTP, L2TP, L2F, and diagnostic ping on a public
interface. A host can send only enough packets to a public interface to establish a
tunnel connection. If the tunnel is not established before a preset maximum
number-of-packets-allowed counter is reached, then the packets from that host are
discarded.
When the public interface is configured to act as a DHCP client, the DHCP client
needs to correspond to an external DHCP server to acquire the IP address, subnet
mask and default route parameters. You can set a cost value to give preferential
routing when two or more public DHCP clients are configured. In this situation,
DSL and cable modem are the preferred choice for connections to the internet.
Private indicates that an interface is attached to the private network and it can
accept nontunneled networking protocols such as TCP/IP, FTP, and HTTP. The
Private interface also accepts tunneled protocols (for example, IPsec, PPTP, L2TP,
L2F) that can be used for secure management access to the Nortel VPN Router.
From the System > LAN window, you can:
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Note: The private LAN interface and the management IP address should
be on the same network, and the public LAN interface should be on a
different network, both physically and logically.
If you have one network only and want to position the Nortel VPN
Router behind the firewall and router, then you should use a private LAN
interface only (do not use a public LAN interface).
Click Add Multinet to add IP addresses.
Click Configure to modify the interface characteristics.
Click Statistics to view the Link Statistics.