User manual

Network Setup
100
At the Brisbane end, click Packet Filtering, the Custom Firewall Rules tab and add this
custom firewall rule:
iptables -I OUTPUT ! -o ipsec+ -d 10.254.0.1 -j DROP
Click Update.
GRE troubleshooting
• Symptom: Cannot ping a host on the other side of the GRE tunnel.
Ensure that there is a route set up on the GRE tunnel to the remote network.
Ensure that there is a route on the remote GRE endpoint to the network at this end of
the GRE tunnel.
Check that there is a GRE interface created on the device. To do this, go into
Advanced Networking and scroll to the bottom. There should be an interface called
greX created. greX is the same as the Interface Name specified in the table of
current GRE tunnels.
Also ensure that the required routes have been set up on the GRE interface. This
might not occur if you have the same route specified on different GRE tunnels, or on
different network interfaces.
Ensure that the remote GRE endpoint is reacheable. Do this by using the ping utility
on the Advanced Networking page.
• Symptom: Cannot ping the remote GRE end point.
Ensure that the remote GRE end point responds to pings. Note that by default no
packets are routed across the GRE tunnel unless there is a route setup on the GRE
tunnel.
Routes
To configure the SG unit’s advanced routing features, click the Routes tab on the
Network Setup page.
Static routes
Here you may add additional static routes for the SG unit. These routes are additional to
those created automatically by the SG unit configuration scripts.
Click New to add a static route. Target Address and Subnet mask identify the
destination network or host. You may also specify an Interface out which the network
traffic should be routed, a Gateway Address through which the network traffic should be
routed, and a Metric for this route.