Chapter 2 How to Set Up Your Network
ZyWALL USG 20-2000 User’s Guide
48
2
You don’t need to activate the WAN1 IPv6 interface but make sure you enable the WAN1 IPv4
interface. In 6to4, the ZyWALL uses the WAN1 IPv4 interface to forward your 6to4 packets over the
IPv4 network.
Note: For 6to4, you do not need to enable IPv6 in the wan1 since the IPv6 packets will be
redirected into the 6to4 tunnel.
3
In Windows, some IPv6 related tunnels may be enabled by default such as Teredo and 6to4
tunnels. It may cause your computer to handle IPv6 packets in an unexpected way. It is
recommended to disable those tunnels on your computer.
2.8 How to Set Up an IPv6-in-IPv4 Tunnel
This example shows how to use the interface and policy route configuration screens to create an
IPv6-in-IPv4 tunnel.
Figure 26
IPv6-in-IPv4 Tunnel Example
In this example, the ZyWALLs (
Z
and
Y
) act as IPv6-in-IPv4 routers which connect the IPv4
Internet and an individual IPv6 network. This configuration example only shows the settings on
ZyWALL
Z
. You can use similar settings to configure ZyWALL
Y
.
Note: In the IPv6-in-IPv4 tunnel application, you must configure the peer gateway’s WAN
IPv4 address as the remote gateway IP.
2.8.1 Configuration Concept
After the IPv6-in-IPv4 tunnel settings are complete, IPv4 and IPv6 packets transmitted between
WAN1 and LAN1 will be handled by the ZyWALL through the following flow.
Figure 27
IPv6-in-IPv4 Tunnel Configuration Concept
2.8.2 Setting Up the IPv6-in-IPv4 Tunnel
1
Click
Add
in the
CONFIGURATION
>
Network
>
Interface
>
Tunnel
screen.
2003:1111:1111:1::1/128
1.2.3.4
2003:1111:1111:1::/64
IPv6
IPv4
Z
5.6.7.8
2004:2222:2222:2::1/128
2004:2222:2222:2::/64
Y
IPv6
WAN
LAN
WAN
LAN
LAN1
(IPv6)
IPv6-in-IPv4
Policy Route
WAN1
(IPv4)
TUNNEL
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
