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无法 PING 具有 ipv6 地址的域

tag-icon • tag-icon ipv6 ping ubuntu-18.04
无法 PING 具有 ipv6 地址的域

突然间，我无法 ping 具有 IPv6 地址的域。我运行以下命令：

 ping google.com

但我没有看到任何返回的内容...它只是返回了这个：

 PING google.com(iad30s15-in-x0e.1e100.net (2607:f8b0:4004:807::200e)) 56 data bytes

仅此而已。我按 CTRL+C 取消，结果出现以下信息：

 --- google.com ping statistics ---
 7 packets transmitted, 0 received, 100% packet loss, time 6125ms

我可以 ping IPv4 地址。我没有做任何防火墙更改。这台机器上发生的唯一变化是通常的 apt-get 更新和重新启动。

这是我的防火墙设置：

 sudo ufw status verbose
 Status: active
 Logging: on (low)
 Default: deny (incoming), allow (outgoing), disabled (routed)
 New profiles: skip

 To                         Action      From
 --                         ------      ----
 80,443/tcp (Apache Full)   ALLOW IN    Anywhere
 22/tcp (OpenSSH)           ALLOW IN    Anywhere
 25/tcp (Postfix)           ALLOW IN    Anywhere
 22                         ALLOW IN    Anywhere
 80,443/tcp (Apache Full (v6)) ALLOW IN    Anywhere (v6)
 22/tcp (OpenSSH (v6))      ALLOW IN    Anywhere (v6)
 25/tcp (Postfix (v6))      ALLOW IN    Anywhere (v6)
 22 (v6)                    ALLOW IN    Anywhere (v6)

我的 /etc/hosts/ 文件：

 cat /etc/hosts
 127.0.0.1 localhost

 # The following lines are desirable for IPv6 capable hosts
 ::1 ip6-localhost ip6-loopback
 fe00::0 ip6-localnet
 ff00::0 ip6-mcastprefix
 ff02::1 ip6-allnodes
 ff02::2 ip6-allrouters
 ff02::3 ip6-allhosts

网络配置：

 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN 
 group default qlen 1000
     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
     inet 127.0.0.1/8 scope host lo
     valid_lft forever preferred_lft forever
 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP 
 group default qlen 1000
     link/ether bc:76:4e:20:2c:c3 brd ff:ff:ff:ff:ff:ff
     inet 104.239.249.27/24 brd 104.239.249.255 scope global eth0
   valid_lft forever preferred_lft forever
inet6 2001:4802:7806:102:be76:4eff:fe20:12b6/64 scope global
   valid_lft forever preferred_lft forever
inet6 2001:4802:7805:103:be76:4eff:fe20:2ccd/64 scope global
   valid_lft forever preferred_lft forever
inet6 fe80::be76:4eff:fe20:2cc3/64 scope link
   valid_lft forever preferred_lft forever
 3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
link/ether bc:76:4e:20:2c:f5 brd ff:ff:ff:ff:ff:ff
inet 10.209.160.56/19 brd 10.209.191.255 scope global eth1
   valid_lft forever preferred_lft forever
inet6 fe80::be76:4eff:fe20:2cf5/64 scope link
   valid_lft forever preferred_lft forever

ip -6 route 的输出：

 ip -6 route
 2001:4802:7805:103::/64 dev eth0 proto kernel metric 256 pref medium
 2001:4802:7806:102::/64 dev eth0 proto kernel metric 256 pref medium
 fe80::/64 dev eth1 proto kernel metric 256 pref medium
 fe80::/64 dev eth0 proto kernel metric 256 pref medium
 default via fe80::def dev eth0 metric 1024 pref medium

traceroute6 的输出：

  traceroute6 google.com
  traceroute to google.com (2607:f8b0:4004:82f::200e) from 
  2001:4802:7806:102:be76:4eff:fe20:12b6, 30 hops max, 24 byte packets
  1  * * *
  2  * * *
  3  * * *

答案1

我这边可以 ping 2001:4802:7805:103:be76:4eff:fe20:2ccd，但无法 ping 2001:4802:7806:102:be76:4eff:fe20:12b6。后一个地址显然用作传出连接的源地址（如 traceroute 所示）。

这个设置有问题。

您可以尝试从配置中删除有问题的地址，并检查这是否有帮助：

ip -6 addr del 2001:4802:7806:102:be76:4eff:fe20:12b6 dev eth0

或者类似的东西，我记不清了。

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