Field Description
DNS Server Primary: Enter the IP address of the DNS server that is to be
used, preferably, by clients who draw an address from this pool.
Secondary: Optionally, enter the IP address of an alternative
DNS server.
14.4 GRE
Generic Routing Encapsulation (GRE) is a network protocol that encapsulates other proto-
cols and transports them in the form of IP tunnels to the specified recipients.
The specification of the GRE protocol is available in two versions:
• GRE V.1 for use in PPTP connections (RFC 2637, configuration in the PPTP menu)
• GRE V.0 (RFC 2784) for general encapsulation using GRE
In this menu you can configure a virtual interface for using GRE V.0. The data traffic routed
over this interface is then encapsulated using GRE and sent to the specified recipient.
14.4.1 GRE Tunnels
A list of all configured GRE tunnels is displayed in the VPN->GRE->GRE Tunnels menu.
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