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IPv6 — 没有到主机的路由 (113)

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IPv6 — 没有到主机的路由 (113)

我正在尝试通过路由器在 IPv6 中连接两个模块（客户端和服务器）。它在 IPv4 中有效，但在 IPv6 中无效。

这是路由器配置：

$ ifconfig
eno1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
    inet 10.40.56.26  netmask 255.255.255.0  broadcast 10.40.56.255
    inet6 fe80::47dc:3b02:90de:2030  prefixlen 64  scopeid 0x20<link>
    ether 18:31:bf:e0:2c:4f  txqueuelen 1000  (Ethernet)
    RX packets 28116  bytes 3152995 (3.0 MiB)
   RX errors 0  dropped 0  overruns 0  frame 0
    TX packets 5440  bytes 3745444 (3.5 MiB)
    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
    device interrupt 16  memory 0xa1300000-a1320000

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 14900  bytes 1346088 (1.2 MiB)
    RX errors 0  dropped 0  overruns 0  frame 0
    TX packets 14900  bytes 1346088 (1.2 MiB)
    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

tun0: flags=4305<UP,POINTOPOINT,RUNNING,NOARP,MULTICAST>  mtu 1500
    inet 192.168.2.1  netmask 255.255.255.0  destination 192.168.2.1
    inet6 fe80::4fe5:b420:b2db:cdab  prefixlen 64  scopeid 0x20<link>
    unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  txqueuelen 500 (UNSPEC)
    RX packets 7  bytes 308 (308.0 B)
    RX errors 0  dropped 0  overruns 0  frame 0
    TX packets 27  bytes 1412 (1.3 KiB)
    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

tun1: flags=4305<UP,POINTOPOINT,RUNNING,NOARP,MULTICAST>  mtu 1500
    inet6 2001:468:3000:1::  prefixlen 48  scopeid 0x0<global>
    inet6 fe80::476b:d7be:189f:c9ee  prefixlen 64  scopeid 0x20<link>
    unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  txqueuelen 500  (UNSPEC)
    RX packets 15  bytes 960 (960.0 B)
    RX errors 0  dropped 0  overruns 0  frame 0
    TX packets 14  bytes 672 (672.0 B)
    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

tun2: flags=4305<UP,POINTOPOINT,RUNNING,NOARP,MULTICAST>  mtu 1500
    inet 192.168.4.1  netmask 255.255.255.0  destination 192.168.4.1
    inet6 2001:468:3000:1::  prefixlen 48  scopeid 0x0<global>
    inet6 fe80::7d63:28af:13a7:6813  prefixlen 64  scopeid 0x20<link>
    unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  txqueuelen 500  (UNSPEC)
    RX packets 33  bytes 2364 (2.3 KiB)
    RX errors 0  dropped 0  overruns 0  frame 0
    TX packets 14  bytes 672 (672.0 B)
    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

tun3: flags=4305<UP,POINTOPOINT,RUNNING,NOARP,MULTICAST>  mtu 1500
    inet 192.168.5.1  netmask 255.255.255.0  destination 192.168.5.1
    inet6 fe80::1a60:3195:6e42:c469  prefixlen 64  scopeid 0x20<link>
    inet6 2001:468:4000:1::  prefixlen 48  scopeid 0x0<global>
    unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  txqueuelen 500  (UNSPEC)
    RX packets 0  bytes 0 (0.0 B)
    RX errors 0  dropped 0  overruns 0  frame 0
    TX packets 14  bytes 672 (672.0 B)
    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

tun4: flags=4305<UP,POINTOPOINT,RUNNING,NOARP,MULTICAST>  mtu 1500
    inet 192.168.2.1  netmask 255.255.255.0  destination 192.168.2.1
    inet6 fe80::fca3:d3a9:2352:e365  prefixlen 64  scopeid 0x20<link>
    unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  txqueuelen 500  (UNSPEC)
    RX packets 0  bytes 0 (0.0 B)
    RX errors 0  dropped 0  overruns 0  frame 0
    TX packets 14  bytes 672 (672.0 B)
    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

virbr0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
    inet 192.168.124.1  netmask 255.255.255.0  broadcast 192.168.124.255
    ether 52:54:00:cb:49:e5  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

以下是路由命令的输出：

$ route -n -6
Kernel IPv6 routing table
Destination                    Next Hop                   Flag Met Ref Use If
2001:468:3000::/48             ::                         U    256 5    15 tun1
2001:468:3000::/48             ::                         U    256 5    33 tun2
2001:468:3000::/48             ::                         U    1024 1     0 tun1
2001:468:4000::/48             ::                         U    256 1     0 tun3
2001:468:4000::/48             ::                         U    1024 1     0 tun3
fc00::40:56:0/112              ::                         U    100 1     0 eno1
fe80::223:ebff:fea6:4c7f/128   ::                         U    100 1     0 eno1
fe80::/64                      ::                         U    256 1     0 eno1
fe80::/64                      ::                         U    256 1     0 tun0
fe80::/64                      ::                         U    256 1     0 tun1
fe80::/64                      ::                         U    256 1     0 tun2
fe80::/64                      ::                         U    256 1     0 tun3
fe80::/64                      ::                         U    256 1     0 tun4
::/0                           fe80::223:ebff:fea6:4c7f   UG   100 13   401 eno1
::/0                           ::                         !n   -1  1   498 lo
::1/128                        ::                         Un   0   5     8 lo
2001:468:3000:1::/128          ::                         Un   0   2     0 lo
2001:468:3000:1::/128          ::                         Un   0   2     0 lo
2001:468:4000:1::/128          ::                         Un   0   2     0 lo
fe80::1a60:3195:6e42:c469/128  ::                         Un   0   2     0 lo
fe80::476b:d7be:189f:c9ee/128  ::                         Un   0   2     0 lo
fe80::47dc:3b02:90de:2030/128  ::                         Un   0   3    50 lo
fe80::4fe5:b420:b2db:cdab/128  ::                         Un   0   2     0 lo
fe80::7d63:28af:13a7:6813/128  ::                         Un   0   2     0 lo
fe80::fca3:d3a9:2352:e365/128  ::                         Un   0   2     0 lo
ff00::/8                       ::                         U    256 4   429 eno1
ff00::/8                       ::                         U    256 1     0 tun0
ff00::/8                       ::                         U    256 1     0 tun1
ff00::/8                       ::                         U    256 1     0 tun2
ff00::/8                       ::                         U    256 1     0 tun3
ff00::/8                       ::                         U    256 1     0 tun4
::/0                           ::                         !n   -1  1   498 lo

客户端尝试连接服务器套接字时连接失败。控制台输出正在打印error 113 No route to host on connect()。

客户端设备正在获取以下地址：

2001：468：3000：2：5851：F42D：40B1：8CCF

当服务器正在获取：

2001：468：3000：1：5851：F42D：40B1：8CCF

请注意，当我在同一设备上配置客户端和服务器时，它可以正常工作。客户端/服务器设备获取以下地址：

2001：468：3000：1：5851：F42D：40B1：8CCF

答案1

我的路由器上未激活 IPV6 的 IP 转发。以下命令可临时激活它：

sysctl -w net.ipv6.conf.all.forwarding=1

要永久激活，请在文件 /etc/sysctl.conf 中添加以下行：

net.ipv6.conf.all.forwarding=1

然后，要应用更改，请使用以下命令重新加载文件：

sysctl -p /etc/sysctl.conf

答案2

rm /etc/dhcpcd.conf

就我的情况而言，我的 Arch 服务器在原始设置后配置过度。此配置文件是可选的，删除它可让 SSH 的 IPv6 连接不再出现问题。

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