IPX routing is enabled if an IPX network is present over the Ethernet interface (see “Configuring IPX for the LAN” in Chapter 9). Bridging is enabled by adding a bridge network over the Ethernet interface (see “Configuring Bridging for the LAN”). Routing and bridging are enabled for each destination in its remote site profile.
When configured for simultaneous bridging and routing, packets received from the LAN are first passed through the router for any configured protocols. If the packet can not be routed, it is passed to the bridge depending on the setting of the Bridge Firewall function. The bridge firewall has three modes, which are configured on the Advanced Bridging Options screen.
The three modes are:
1. Discard Routed Protocols (Discard):
This is the default mode. If a protocol is configured for routing, and a packet for that protocol type is received from the LAN that is not addressed to the MAC address of the OfficeConnect Remote 840, it is discarded. Additionally, broadcasts (including ARPs) for the protocol are not passed to the bridge.
2. Forward Unicast Packets Only (Unicast):
If a protocol is configured for routing, and a packet for that protocol type is received from the LAN that is not addressed to the MAC address of the OfficeConnect Remote 840, it is bridged. Additionally, ARP broadcasts for IP addresses other than that of the OfficeConnect Remote 840 are also bridged. Other broadcasts for the configured protocol are not bridged.
3. Forward Broadcast/Unicast Packets (All):
Unicast packets for a configured protocol received from the LAN that are not addressed to the MAC address of the OfficeConnect Remote 840 are bridged. Received broadcasts (e.g., DHCP) are bridged.
Packets received from the WAN do not pass through the Bridge Firewall. Instead, packets received from the WAN are delivered to the router or they are delivered to the router or bridging function based on their encapsulation and on the state of the
