按照6to4隧道指南的安装 ，我想testingipv6连接，但是我不能ping6到ipv6.google.com。
详情如下：
# traceroute 192.88.99.1 traceroute to 192.88.99.1 (192.88.99.1), 30 hops max, 40 byte packets 1 static.vdc.vn (123.30.53.1) 1.514 ms 2.622 ms 3.760 ms 2 static.vdc.vn (123.30.63.117) 0.608 ms 0.696 ms 0.735 ms 3 static.vdc.vn (123.30.63.101) 0.474 ms 0.477 ms 0.506 ms 4 203.162.231.214 (203.162.231.214) 11.327 ms 11.320 ms 11.312 ms 5 static.vdc.vn (222.255.165.34) 11.546 ms 11.684 ms 11.768 ms 6 203.162.217.26 (203.162.217.26) 42.460 ms 42.424 ms 42.401 ms 7 218.188.104.173 (218.188.104.173) 42.489 ms 42.462 ms 42.415 ms 8 218.189.5.10 (218.189.5.10) 42.613 ms 218.189.5.42 (218.189.5.42) 42.273 ms 42.300 ms 9 d1-26-224-143-118-on-nets.com (118.143.224.26) 205.752 ms d1-18-224-143-118-on-nets.com (118.143.224.18) 207.130 ms d1-14-224-143-118-on-nets.com (118.143.224.14) 206.970 ms 10 218.189.5.150 (218.189.5.150) 207.456 ms 206.349 ms 206.941 ms 11 * * * 12 10gigabitethernet2-1.core1.lax1.he.net (72.52.92.121) 214.087 ms 214.426 ms 214.818 ms 13 192.88.99.1 (192.88.99.1) 207.215 ms 199.270 ms 209.391 ms # ifconfig tun6to4 tun6to4 Link encap:IPv6-in-IPv4 inet6 addr: 2002:x:x::/16 Scope:Global inet6 addr: ::xxxx/128 Scope:Compat UP RUNNING NOARP MTU:1480 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:11 dropped:0 overruns:0 carrier:11 collisions:0 txqueuelen:0 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b) # iptunnel sit0: ipv6/ip remote any local any ttl 64 nopmtudisc tun6to4: ipv6/ip remote any local xxxx ttl 64 # ip -6 route show ::/96 via :: dev tun6to4 metric 256 expires 21332777sec mtu 1480 advmss 1420 hoplimit 4294967295 2002::/16 dev tun6to4 metric 256 expires 21332794sec mtu 1480 advmss 1420 hoplimit 4294967295 fe80::/64 dev eth0 metric 256 expires 15674592sec mtu 1500 advmss 1440 hoplimit 4294967295 fe80::/64 dev eth1 metric 256 expires 15674597sec mtu 1500 advmss 1440 hoplimit 4294967295 fe80::/64 dev tun6to4 metric 256 expires 21332794sec mtu 1480 advmss 1420 hoplimit 4294967295 default via ::192.88.99.1 dev tun6to4 metric 1 expires 21332861sec mtu 1480 advmss 1420 hoplimit 4294967295 # ping6 -n -c 4 ipv6.google.com PING ipv6.google.com(2404:6800:8005::68) 56 data bytes From 2002:x:x:: icmp_seq=0 Destination unreachable: Address unreachable From 2002:x:x:: icmp_seq=1 Destination unreachable: Address unreachable From 2002:x:x:: icmp_seq=2 Destination unreachable: Address unreachable From 2002:x:x:: icmp_seq=3 Destination unreachable: Address unreachable --- ipv6.google.com ping statistics --- 4 packets transmitted, 0 received, +4 errors, 100% packet loss, time 2999ms 我的问题是什么？
谢谢，
6to4机制非常脆弱，今天不推荐。
由于您不select退出继电器，如果它已经死机或configuration错误，您将无法更改。 这可能是你的问题（中继在v4中可以访问，但是你不能确定主机上的6to4机制已经启动），但你不能使用另一个退出节点来检查…
如果6to4中继path上的防火墙正在过滤协议41，则还有其他可能性。在这种情况下，您将无法设置6in4隧道。
对不起，我的“错字”错误。 我的公共IPv4是：xxx127，但我input：
ip tunnel add tun6to4 mode sit ttl 64 remote any local xxx27
现在，我可以ping6和traceroute6到ipv6.google.com：
# ping6 -n -c 4 ipv6.google.com PING ipv6.google.com(2404:6800:8005::63) 56 data bytes 64 bytes from 2404:6800:8005::63: icmp_seq=0 ttl=58 time=217 ms 64 bytes from 2404:6800:8005::63: icmp_seq=1 ttl=58 time=217 ms 64 bytes from 2404:6800:8005::63: icmp_seq=2 ttl=58 time=217 ms 64 bytes from 2404:6800:8005::63: icmp_seq=3 ttl=58 time=217 ms --- ipv6.google.com ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3001ms rtt min/avg/max/mdev = 217.258/217.366/217.489/0.577 ms, pipe 2 # traceroute6 ipv6.google.com traceroute to ipv6.google.com (2404:6800:8005::63), 30 hops max, 40 byte packets 1 2002:c058:6301::1 (2002:c058:6301::1) 199.193 ms 199.169 ms 199.153 ms 2 gige-g4-12.core1.lax1.he.net (2001:470:0:14e::1) 199.279 ms 199.268 ms 199.403 ms 3 PR01.LAX03.google.com (2001:504:0:3:0:1:5169:1) 199.633 ms 199.620 ms 199.755 ms 4 2001:4860::1:0:991 (2001:4860::1:0:991) 242.128 ms 2001:4860::1:0:607 (2001:4860::1:0:607) 204.765 ms 2001:4860::1:0:991 (2001:4860::1:0:991) 204.753 ms 5 2001:4860::1:0:7ea (2001:4860::1:0:7ea) 235.740 ms 243.709 ms 2001:4860::1:0:21 (2001:4860::1:0:21) 233.959 ms 6 2001:4860::1:0:75 (2001:4860::1:0:75) 215.427 ms 233.980 ms 2001:4860::1:0:47 (2001:4860::1:0:47) 214.836 ms 7 2001:4860::1:0:1063 (2001:4860::1:0:1063) 242.264 ms 2001:4860::1:0:16 (2001:4860::1:0:16) 216.691 ms 2001:4860::1:0:1063 (2001:4860::1:0:1063) 242.287 ms 8 2001:4860::2:0:119c (2001:4860::2:0:119c) 217.665 ms 2001:4860::2:0:119b (2001:4860::2:0:119b) 217.597 ms 217.436 ms 9 * 2001:4860:0:1::e1 (2001:4860:0:1::e1) 221.650 ms * 10 2404:6800:8005::63 (2404:6800:8005::63) 216.882 ms 216.917 ms 216.897 ms
我将尝试configuration6in4隧道，以查看6to4隧道的不同之处。
感谢您的信息。