If the destination IP address is on a remote network, the device trying to send a packet performs
a most-specific to least-specific search for the source IP network. If a matching source route is
found within the routing table, any routing table entries that contain that source IP network are
used as a destination routing table. For example:
This source-based routing table shows three source routes. If a packet sent to 10.0.0.100 is
coming from the 192.168.0.0/24 network, Equalizer will use 10.0.0.1 as the gateway. If it is
coming from the 192.168.1.0/24 network, Equalizer will use 10.0.0.2 as the gateway. If it is
coming from any other network, Equalizer will use 10.0.0.3 as the gateway.
The IP 0.0.0.0/0 is the least specific that a network entry can be - it matches every IP address.
However, because of the most-specific to least-specific search that Equalizer performs, the
0.0.0.0/0 source route is not used unless none of the other routes match.
Also note that in this configuration, any packets that have a destination IP address other than a
network local to Equalizer (presumably 192.168.0.0/24, 192.168.1.0/24 and 10.0.0.0/8), a route
would not be found and the packet would be dropped by the system. To prevent this from
happening, most configurations include a default route in the form (0.0.0.0/0, 0.0.0.0/0) ||
GATEWAY.
Local Networks:
Any network that has been added as an Equalizer subnet is considered local to
Equalizer. When a subnet is configured, an Administrator assigns an IP address (potentially more
than one) that is Equalizer's IP presence on this subnet. When an Equalizer is referred to as being
in
single-network
mode or
dual-network
mode, this is the number of local networks.
Remote Networks:
Any network that is not a local network. This means that Equalizer needs to
perform routing to communicate with a device on this network.
Copyright © 2014 Coyote Point Systems, A Subsidiary of Fortinet, Inc.
All Rights Reserved.
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Equalizer Administration Guide
Summary of Contents for Equalizer GX Series
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