在 V2EX 潜伏很久了,第一次发帖,请 IPV6 相关大咖帮忙瞄一眼 pptpd+teredo 的问题

2017-04-27 16:45:13 +08:00
 hpclass

第一次发帖,求关注 这个应该归为路由器吧,, 直入正文吧,我用一台 Ubuntu 16.04 LTS 做为 PPTPD 服务器,上面装了 teredo 获取到 IPV6 地址,如图: 传不了图我给文字吧:

teredo    Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 

          inet6 addr: 2001:0:53aa:64c:1c11:e8c7:8bfe:ad79/32 Scope:Global
          
          inet6 addr: fe80::ffff:ffff:ffff/64 Scope:Link
          
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1280  Metric:1
          
          RX packets:79 errors:0 dropped:0 overruns:0 frame:0
          
          TX packets:313 errors:0 dropped:0 overruns:0 carrier:0
          
          collisions:0 txqueuelen:500 
          
          RX bytes:8010 (8.0 KB)  TX bytes:24578 (24.5 KB)
          
          

pptpd 服务器和 radvd,tdhcp 均已按照 google 配置好,以下是 ppp0 的情况:

ppp0      Link encap:Point-to-Point Protocol  

          inet addr:192.168.213.1  P-t-P:192.168.213.3  Mask:255.255.255.255
          inet6 addr: fe80::2/10 Scope:Link
          inet6 addr: 2001:0:53aa:64c:f443:5fbb:93e3:f0e1/128 Scope:Global
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1400  Metric:1
          RX packets:1894 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2395 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:3 
          RX bytes:248168 (248.1 KB)  TX bytes:873012 (873.0 KB)

但是,在 ppp0 下面,ping fe80::2 是通的,其他非本机地址全部超时, 在 Ubuntu 上执行 tcpdump 抓包看到,ICMP6 能传递到 teredo 网卡上发出去,也有 ICMP6 的回应,可是 ppp0 却收不到回应,仿佛给 Ubuntu 吃了一样,以下是抓包数据

root@ubuntu:/etc# tcpdump -t -vv ip6 -i teredo
 
 
 
tcpdump: listening on teredo, link-type RAW (Raw IP), capture size 262144 bytes
IP6 (hlim 63, next-header ICMPv6 (58) payload length: 40)
 
 
2001:0:53aa:64c:1c11:e8c7:8bfe:ad79 > 2401:3800:4001:807::1018: [icmp6 sum ok] ICMP6, echo request, seq 622
IP6 (hlim 63, next-header ICMPv6 (58) payload length: 40) 2001:0:53aa:64c:1c11:e8c7:8bfe:ad79 > 2401:3800:4001:807::1018: [icmp6 sum ok] ICMP6, echo request, seq 623
IP6 (flowlabel 0x97b84, hlim 56, next-header ICMPv6 (58) payload length: 40) 2401:3800:4001:807::1018 > 2001:0:53aa:64c:1c11:e8c7:8bfe:ad79: [icmp6 sum ok] ICMP6, echo reply, seq 623
IP6 (flowlabel 0x97b84, hlim 56, next-header ICMPv6 (58) payload length: 40) 2401:3800:4001:807::1018 > 2001:0:53aa:64c:1c11:e8c7:8bfe:ad79: [icmp6 sum ok] ICMP6, echo reply, seq 622
IP6 (hlim 63, next-header ICMPv6 (58) payload length: 40) 2001:0:53aa:64c:1c11:e8c7:8bfe:ad79 > 2401:3800:4001:807::1018: [icmp6 sum ok] ICMP6, echo request, seq 624
IP6 (flowlabel 0x97b84, hlim 56, next-header ICMPv6 (58) payload length: 40) 2401:3800:4001:807::1018 > 2001:0:53aa:64c:1c11:e8c7:8bfe:ad79: [icmp6 sum ok] ICMP6, echo reply, seq 624
IP6 (hlim 63, next-header ICMPv6 (58) payload length: 40) 2001:0:53aa:64c:1c11:e8c7:8bfe:ad79 > 2401:3800:4001:807::1018: [icmp6 sum ok] ICMP6, echo request, seq 625
IP6 (flowlabel 0x97b84, hlim 56, next-header ICMPv6 (58) payload length: 40) 2401:3800:4001:807::1018 > 2001:0:53aa:64c:1c11:e8c7:8bfe:ad79: [icmp6 sum ok] ICMP6, echo reply, seq 625

^C
root@ubuntu:/home/hp# tcpdump -t -i ppp0 -vv ip6


tcpdump: listening on ppp0, link-type LINUX_SLL (Linux cooked), capture size 262144 bytes
IP6 (hlim 64, next-header ICMPv6 (58) payload length: 40) 213:0:53aa:64c:f443:5fbb:93e3:f0e1 > 2401:3800:4001:807::1018: [icmp6 sum ok] ICMP6, echo request, seq 622
IP6 (hlim 64, next-header ICMPv6 (58) payload length: 40) 213:0:53aa:64c:f443:5fbb:93e3:f0e1 > 2401:3800:4001:807::1018: [icmp6 sum ok] ICMP6, echo request, seq 623
IP6 (hlim 64, next-header ICMPv6 (58) payload length: 40) 213:0:53aa:64c:f443:5fbb:93e3:f0e1 > 2401:3800:4001:807::1018: [icmp6 sum ok] ICMP6, echo request, seq 624
IP6 (hlim 64, next-header ICMPv6 (58) payload length: 40) 213:0:53aa:64c:f443:5fbb:93e3:f0e1 > 2401:3800:4001:807::1018: [icmp6 sum ok] ICMP6, echo request, seq 625
^C

路由信息

root@ubuntu:/home/hp# ip -6 route

213:0:53aa:64c:f443:5fbb:93e3:f0e1 dev ppp0  proto kernel  metric 256  mtu 1400 pref medium
2001:0:53aa:213:7463:dbeb:eead:ac94 dev ppp3  proto kernel  metric 256  mtu 1400 pref medium
2001:0:53aa:213:ac16:729a:bdd8:225f dev ppp2  metric 1024  pref medium
2001::/32 dev teredo  proto kernel  metric 256  pref medium
fe80::/64 dev teredo  proto kernel  metric 256  pref medium
fe80::/10 dev ppp0  metric 1  mtu 1400 pref medium
fe80::/10 dev ppp0  proto kernel  metric 256  mtu 1400 pref medium
default dev teredo  metric 1029  pref medium
root@ubuntu:/home/hp# route -6
Kernel IPv6 routing table
Destination                    Next Hop                   Flag Met Ref Use If
213:0:53aa:64c:f443:5fbb:93e3:f0e1/128 ::                         U    256 0     0 ppp0
2001::/32                      ::                         U    256 5    22 teredo
fe80::/64                      ::                         U    256 0     0 teredo
fe80::/10                      ::                         U    1   1     7 ppp0
fe80::/10                      ::                         U    256 0     0 ppp0
::/0                           ::                         U    1029 7    70 teredo
::/0                           ::                         !n   -1  1  2220 lo
::1/128                        ::                         Un   0   9    44 lo
213:0:53aa:64c:f443:5fbb:93e3:f0e1/128 ::                         Un   0   2    21 lo
2001::/128                     ::                         Un   0   1     0 lo
fe80::/128                     ::                         Un   0   1     0 lo
fe80::/128                     ::                         Un   0   1     0 lo
fe80::/128                     ::                         Un   0   1     0 lo
fe80::/128                     ::                         Un   0   1     0 lo
fe80::/128                     ::                         Un   0   1     0 lo
fe80::/128                     ::                         Un   0   1     0 lo
fe80::2/128                    ::                         Un   0   1     0 lo
fe80::2/128                    ::                         Un   0   1     0 lo
fe80::ffff:ffff:ffff/128       ::                         Un   0   1     0 lo
fe80::f443:5fbb:93e3:f0e1/128   ::                         Un   0   1     0 lo
ff00::/8                       ::                         U    256 4  2096 ens39
ff00::/8                       ::                         U    256 1  2267 ens33
ff00::/8                       ::                         U    256 0     0 ens38
ff00::/8                       ::                         U    256 0     0 teredo
ff00::/8                       ::                         U    256 4    37 ppp0
::/0                           ::                         !n   -1  1  2220 lo

另外,我试验过,在 Ubuntu 上 ping ppp0 的 Global 地址,响应时间是<1ms,ping ppp0 的 ipv4 是 2ms,我推测是 lo 把数据包吃了,,,求大佬们指点,搞这个玩意两星期了。。谷歌查的前几页都眼熟了,,

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