I can't ping that gateway address, here is the output:
pi@raspberrypi:~ $ ping6 2001:470:c:fbc::1
PING 2001:470:c:fbc::1(2001:470:c:fbc::1) 56 data bytes
^C
--- 2001:470:c:fbc::1 ping statistics ---
6 packets transmitted, 0 received, 100% packet loss, time 217ms
The process I created the tunnel is:
1) editing the /etc/network/interfacs, pasting the example configuration to that file
2) restart the network by using "service networking restart"
3) I even tried reboot my pi, but it still didn't work
I tried another ifconfig test, turned out that I can transmit packages through he tunnel, but cannot receive from it.
Here's the output of ifconfig now:
en0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.1.10 netmask 255.255.255.0 broadcast 192.168.1.255
inet6 fdac:751d:4768:7800:18a8:bfef:8d8f:5eb5 prefixlen 64 scopeid 0x0<global>
inet6 fe80::223d:fd87:da7b:2aa0 prefixlen 64 scopeid 0x20<link>
ether b8:27:eb:4b:44:80 txqueuelen 1000 (Ethernet)
RX packets 101 bytes 10755 (10.5 KiB)
RX errors 0 dropped 5 overruns 0 frame 0
TX packets 91 bytes 16525 (16.1 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
he-ipv6: flags=209<UP,POINTOPOINT,RUNNING,NOARP> mtu 1480
inet6 2001:470:c:fbc::2 prefixlen 64 scopeid 0x0<global>
inet6 fe80::c0a8:10a prefixlen 64 scopeid 0x20<link>
sit txqueuelen 1000 (IPv6-in-IPv4)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 6 bytes 624 (624.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
wlan0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether b8:27:eb:1e:11:d5 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
As for the address fdac:751d:4768:7800:18a8:bfef:8d8f:5eb5, I checked all my devices in local network, turned out they all had a address like that, which is fdac:751d:4768:7800:X:X:X:X
After I reset my modem, that address is disappeared, the output of ifconfig for now is:
pi@raspberrypi:~ $ ifconfig
en0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.1.10 netmask 255.255.255.0 broadcast 192.168.1.255
inet6 fe80::223d:fd87:da7b:2aa0 prefixlen 64 scopeid 0x20<link>
ether b8:27:eb:4b:44:80 txqueuelen 1000 (Ethernet)
RX packets 864 bytes 79077 (77.2 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 341 bytes 52878 (51.6 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
he-ipv6: flags=209<UP,POINTOPOINT,RUNNING,NOARP> mtu 1480
inet6 2001:470:c:fbc::2 prefixlen 64 scopeid 0x0<global>
inet6 fe80::c0a8:10a prefixlen 64 scopeid 0x20<link>
sit txqueuelen 1000 (IPv6-in-IPv4)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 24 bytes 2008 (1.9 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 2 bytes 196 (196.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 2 bytes 196 (196.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
wlan0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether b8:27:eb:1e:11:d5 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
I installed nmap to scan the protocols, here is the result
pi@raspberrypi:~ $ sudo nmap -Pn -sO -p 1,6,17,41 -6 2001:470:c:fbc::1
Starting Nmap 7.70 ( https://nmap.org ) at 2019-10-26 09:45 CST
Nmap scan report for tunnel557606.tunnel.tserv15.lax1.ipv6.he.net (2001:470:c:fbc::1)
Host is up.
PROTOCOL STATE SERVICE
1 open|filtered icmp
6 open|filtered tcp
17 open|filtered udp
41 open|filtered ipv6
Nmap done: 1 IP address (1 host up) scanned in 3.24 seconds
pi@raspberrypi:~ $ sudo nmap -Pn -sO -p 1,6,17,41 66.220.18.42
Starting Nmap 7.70 ( https://nmap.org ) at 2019-10-26 09:54 CST
Nmap scan report for tserv1.lax1.he.net (66.220.18.42)
Host is up (0.17s latency).
PROTOCOL STATE SERVICE
1 open icmp
6 open tcp
17 open udp
41 open|filtered ipv6
Nmap done: 1 IP address (1 host up) scanned in 2.76 seconds
Does the state "open|filtered" mean ipv6 service is filtered so i can't get access to any ipv6 address?