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Chapter 3 – Using the Web Management Software
66 MultiModem rCell User Guide
Packet Filters, Advanced Parameters
Connection Tracking Group
H323: Enable or disable the forwarding of H323 packets across the firewall.
PPTP: Enable or disable PPTP Packet Pass-through (PPTP NAT support).
Note: H323 and PPTP are disabled by default.
ICMP Configuration Group
Use the Internet Control Message Protocol (ICMP) to test the network connections and the firewall. You can also
use ICMP for diagnostic purposes. ICMP on Firewall and ICMP Forwarding always apply to all IP addresses; i.e.,
Any. When these are enabled, all IP hosts can Ping the firewall (ICMP on Firewall) or the network behind it (ICMP
Forwarding).
ICMP on LAN: Enable or disable the transfer of ICMP packets on the LAN interface.
ICMP on WAN: Enable or disable the transfer of ICMP packets on the WAN interface.
ICMP Forward: Enable or disable the forwarding of ICMP packets through the firewall into the local network.
Note: ICMP on the LAN, WAN, and Forward are enabled by default.
Submitting and Saving Your Changes
To save these settings, click Submit.
To ensure your changes go into effect, click Save and Restart.
GRE Tunnels
Generic Routing Encapsulation (GRE) includes GRE tunneling and GRE routing
First, you create the GRE Tunnels by using the GRE Tunnel Configuration group.
Then, you configure the routes for the remote networks that are routed through a tunnel, by using the GRE
Routes Configuration group. All the traffic destined to remote networks associated to a tunnel are routed through
that tunnel.