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Chapter 7 Interfaces
ZyWALL 110/310/1100 Series User’s Guide
145
Tunnel Mode Select the tunneling protocol of the interface (GRE, IPv6-in-IPv4 or 6to4). See
Section 7.6 on page 140 for more information.
IP Address
Assignment
This section is available if you are configuring a GRE tunnel.
IP Address Enter the IP address for this interface.
Subnet Mask Enter the subnet mask of this interface in dot decimal notation. The subnet mask
indicates what part of the IP address is the same for all computers in the network.
Metric Enter the priority of the gateway (if any) on this interface. The ZyWALL decides which
gateway to use based on this priority. The lower the number, the higher the priority. If
two or more gateways have the same priority, the ZyWALL uses the one that was
configured first.
IPv6 Address
Assignment
This section is available if you are configuring an IPv6-in-IPv4 or a 6to4 tunnel.
IPv6 Address/
Prefix Length
Enter the IPv6 address and the prefix length for this interface if you want to use a static
IP address. This field is optional.
The prefix length indicates what the left-most part of the IP address is the same for all
computers in the network, that is, the network address.
Metric Enter the priority of the gateway (if any) on this interface. The ZyWALL decides which
gateway to use based on this priority. The lower the number, the higher the priority. If
two or more gateways have the same priority, the ZyWALL uses the one that was
configured first.
6to4 Tunnel
Parameter
This section is available if you are configuring a 6to4 tunnel which encapsulates IPv6 to
IPv4 packets.
6to4 Prefix Enter the IPv6 prefix of a destination network. The ZyWALL forwards IPv6 packets to
the hosts in the matched network.
If you enter a prefix starting with 2002, the ZyWALL will forward the matched packets
to the IPv4 IP address converted from the packets’ destination address. The IPv4 IP
address can be converted from the next 32 bits after the prefix you specified in this
field. See 6to4 Tunneling on page 141 for an example. The ZyWALL forwards the
unmatched packets to the specified Relay Router.
Relay Router Enter the IPv4 address of a 6to4 relay router which helps forward packets between
6to4 networks and native IPv6 networks.
Remote
Gateway Prefix
Enter the IPv4 network address and network bits of a remote 6to4 gateway, for
example, 14.15.0.0/16.
This field works if you enter a 6to4 Prefix not starting with 2002 (2003 for example).
The ZyWALL forwards the matched packets to a remote gateway with the network
address you specify here, and the bits converted after the 6to4 Prefix in the packets.
For example, you configure the 6to4 prefix to 2003:A0B::/32 and the remote gateway
prefix to 14.15.0.0/16. If a packet’s destination is 2003:A0B:1011:5::8, the ZyWALL
forwards the packet to 14.15.16.17, where the network address is 14.15.0.0 and the
host address is the remain bits converted from 1011 after the packet’s 6to4 prefix
(2003:A0B).
Gateway Settings
My Address Specify the interface or IP address to use as the source address for the packets this
interface tunnels to the remote gateway. The remote gateway sends traffic to this
interface or IP address.
Remote
Gateway
Address
Enter the IP address or domain name of the remote gateway to which this interface
tunnels traffic.
Automatic displays in this field if you are configuring a 6to4 tunnel. It means the 6to4
tunnel will help forward packets to the corresponding remote gateway automatically by
looking at the packet’s destination address.
Table 51 Network > Interface > Tunnel > Add/Edit (continued)
LABEL DESCRIPTION