ZyXEL Communications ZyWall 110 User Manual page 352

Table 118 Network > Interface > Tunnel > Add/Edit (continued)
LABEL DESCRIPTION
Tunnel Mode Select the tunneling protocol of the interface (GRE, IPv6-in-IPv4 or 6to4). See
on page 347
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 Zyxel Device 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 Zyxel Device 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 IP
Prefix Length
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 Zyxel Device 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 Zyxel Device uses the one that was configured
first.
6to4 Tunnel This section is available if you are configuring a 6to4 tunnel which encapsulates IPv6 to IPv4
Parameter packets.
6to4 Prefix Enter the IPv6 prefix of a destination network. The Zyxel Device forwards IPv6 packets to the
hosts in the matched network.
If you enter a prefix starting with 2002, the Zyxel Device 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
Tunneling on page 348
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 example,
Gateway Prefix
14.15.0.0/16.
This field works if you enter a 6to4 Prefix not starting with 2002 (2003 for example). The Zyxel
Device 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 Zyxel Device 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 tunnels
Gateway
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 10 Interfaces
for more information.
for an example. The Zyxel Device forwards the unmatched packets
ZyWALL USG Series User's Guide
352
Section 10.8
6to4