ZyXEL Communications ZyWALL 110 User Manual page 228

Table 98 Network > Interface > Tunnel > Add/Edit (continued)
LABEL DESCRIPTION
Tunnel Mode Select the tunneling protocol of the interface (GRE, IPv6-in-IPv4 or 6to4). See
Section 9.6 on page 223
IP Address This section is available if you are configuring a GRE tunnel.
Assignment
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/USG 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/USG uses the one
that was configured first.
IPv6 Address This section is available if you are configuring an IPv6-in-IPv4 or a 6to4 tunnel.
Assignment
IPv6 Address/ Enter the IPv6 address and the prefix length for this interface if you want to use a static
Prefix Length
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/USG 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/USG uses the one
that was configured first.
6to4 Tunnel This section is available if you are configuring a 6to4 tunnel which encapsulates IPv6 to
Parameter IPv4 packets.
6to4 Prefix Enter the IPv6 prefix of a destination network. The ZyWALL/USG forwards IPv6 packets
to the hosts in the matched network.
If you enter a prefix starting with 2002, the ZyWALL/USG 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
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 Enter the IPv4 network address and network bits of a remote 6to4 gateway, for
Gateway Prefix
example, 14.15.0.0/16.
This field works if you enter a 6to4 Prefix not starting with 2002 (2003 for example).
The ZyWALL/USG 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/
USG 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 Enter the IP address or domain name of the remote gateway to which this interface
Gateway
tunnels traffic.
Address
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.
Chapter 9 Interfaces
for more information.
6to4 Tunneling on page 225
ZyWALL/USG Series User's Guide
228
for an example. The ZyWALL/USG forwards