Ubuntu miredo没有显示界面

我正试图在我的ubuntu上设置miredo隧道。我在我的机器上安装了miredo。当我检查miredo服务的状态时

● miredo.service - Teredo IPv6 tunneling
   Loaded: loaded (/lib/systemd/system/miredo.service; enabled; vendor preset: enabled)
   Active: active (running) since Wed 2016-04-20 18:17:22 IST; 2min 26s ago
  Process: 14589 ExecStartPre=/usr/sbin/miredo-checkconf -f /etc/miredo/miredo.conf (code=exited, status=0/SUCCESS)
 Main PID: 14592 (miredo)
   CGroup: /system.slice/miredo.service
           ├─14592 /usr/sbin/miredo -f
           ├─14593 /usr/sbin/miredo -f
           └─14594 /usr/lib/x86_64-linux-gnu/miredo/miredo-privproc A

Apr 20 18:17:22 manu-ThinkCentre-E73 systemd[1]: Starting Teredo IPv6 tunneling...
Apr 20 18:17:22 manu-ThinkCentre-E73 systemd[1]: Started Teredo IPv6 tunneling.
Apr 20 18:17:22 manu-ThinkCentre-E73 miredo[14592]: Starting...
Apr 20 18:17:22 manu-ThinkCentre-E73 miredo[14592]: miredo[14592]: Starting...
Apr 20 18:17:34 manu-ThinkCentre-E73 miredo[14593]: No reply from Teredo server
Apr 20 18:17:34 manu-ThinkCentre-E73 miredo[14592]: miredo[14593]: No reply from Teredo server

它在跑。但是当我检查我的接口时，它没有显示teredo接口

ifconfig
eth0      Link encap:Ethernet  HWaddr d8:cb:8a:0c:ff:06  
          inet addr:192.168.2.230  Bcast:192.168.7.255  Mask:255.255.248.0
          inet6 addr: fe80::dacb:8aff:fe0c:ff06/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:3073382 errors:0 dropped:0 overruns:0 frame:0
          TX packets:315655 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:819770191 (819.7 MB)  TX bytes:27992299 (27.9 MB)

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:25717 errors:0 dropped:0 overruns:0 frame:0
          TX packets:25717 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:2616881 (2.6 MB)  TX bytes:2616881 (2.6 MB)

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那么问题出在哪里？

重新启动机器后尝试启动mirodo服务：

苏多米雷多-f

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上面写着“Teredo服务器没有回复”，所以显然该服务无法联系任何Teredo服务器。你确定Teredo数据包是由你的基础设施（防火墙、路由器、NAT网关）转发的吗？我们怎么能检查呢？我不是网络人