无法启动vncserver: bind:无法分配请求的地址(99)

Question

我在我的覆盆子Pi中使用vnc over ssh。它已经运行了一段时间，但是在跟踪这些指示之后，在运行Raspbian的Raspberry上设置了openvpn。我发现我无法再访问Raspberry Pi上的VNC服务器。

在ssh上转发D4是有效的，但是很明显，vnc server无法访问它的端口，因此甚至没有启动。

$ sudo systemctl status vncserver-x11-serviced -l

● vncserver-x11-serviced.service - VNC Server in Service Mode daemon
   Loaded: loaded (/usr/lib/systemd/system/vncserver-x11-serviced.service; enabled)
   Active: active (running) since Sun 2018-01-21 14:25:11 GMT; 1s ago
Main PID: 8896 (vncserver-x11-s)
   CGroup: /system.slice/vncserver-x11-serviced.service
       ├─8896 /usr/bin/vncserver-x11-serviced -fg
       ├─8898 /usr/bin/vncserver-x11-core -service
       └─8913 /usr/bin/vncagent service 14

Jan 21 14:25:11 raspberrypi vncserver-x11[8898]: TcpListenerManager: not accepting connections: failed to listen on at least one address.
Jan 21 14:25:11 raspberrypi vncserver-x11[8898]: TcpListenerManager: not listening on [::1]::5900: bind: Cannot assign requested address (99)
Jan 21 14:25:11 raspberrypi vncserver-x11[8898]: TcpListenerManager: not accepting connections: failed to listen on at least one address.
Jan 21 14:25:11 raspberrypi vncserver-x11[8898]: TcpListenerManager: not listening on [::1]::5900: bind: Cannot assign requested address (99)
Jan 21 14:25:11 raspberrypi vncserver-x11[8898]: TcpListenerManager: not accepting connections: failed to listen on at least one address.
Jan 21 14:25:11 raspberrypi vncserver-x11[8898]: TcpListenerManager: not listening on [::1]::5900: bind: Cannot assign requested address (99)
Jan 21 14:25:11 raspberrypi vncserver-x11[8898]: TcpListenerManager: not accepting connections: failed to listen on at least one address.
Jan 21 14:25:11 raspberrypi vncserver-x11[8898]: TcpListenerManager: not listening on [::1]::5900: bind: Cannot assign requested address (99)
Jan 21 14:25:11 raspberrypi vncserver-x11[8898]: TcpListenerManager: not accepting connections: failed to listen on at least one address.
Jan 21 14:25:11 raspberrypi vncserver-x11[8898]: ConsoleDisplay: Found running X server (pid=1001)

那个港口上似乎没有任何东西在运行。这是lsof的输出：

$ sudo lsof -i tcp

COMMAND    PID       USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
cupsd      752       root   10u  IPv4  13511      0t0  TCP localhost:ipp (LISTEN)
cups-brow  756       root    5u  IPv4 313573      0t0  TCP localhost:48450->localhost:ipp (CLOSE_WAIT)
dnsmasq    914    dnsmasq    5u  IPv4  11726      0t0  TCP *:domain (LISTEN)
dnsmasq    914    dnsmasq    7u  IPv6  11728      0t0  TCP *:domain (LISTEN)
sshd       976       root    3u  IPv4  11842      0t0  TCP *:2718 (LISTEN)
tor        998 debian-tor    4u  IPv4  12125      0t0  TCP 192.168.254.159:49042->ks3352401.kimsufi.com:8090 (ESTABLISHED)
tor        998 debian-tor    7u  IPv4  14489      0t0  TCP localhost:9050 (LISTEN)
tor        998 debian-tor   11u  IPv4  15915      0t0  TCP 172.94.70.220:47186->166.70.170.234:https (ESTABLISHED)
sshd      5550       root    3u  IPv4 315897      0t0  TCP 192.168.254.159:2718->192.168.254.47:64500 (ESTABLISHED)
sshd      6322      morey    3u  IPv4 315897      0t0  TCP 192.168.254.159:2718->192.168.254.47:64500 (ESTABLISHED)
sshd      6322      morey   10u  IPv4 319584      0t0  TCP localhost:6010 (LISTEN)

以下是一些可能有用的其他信息：

$ uname -a
Linux raspberrypi 4.9.35-v7+ #1014 SMP Fri Jun 30 14:47:43 BST 2017 armv7l GNU/Linux

$ vncserver --help
VNC(R) Server 6.1.1 (r28093) ARMv6 (May 19 2017 12:59:35)

这可能与对iptables的更改或在/etc/sysctl.conf中禁用ip6有关，但我不知道如何排除它。任何想法都将不胜感激。

Answer 1

Jan 21 14:25:11 raspberrypi vncserver-x11[8898]: TcpListenerManager: not accepting connections: failed to listen on at least one address.
Jan 21 14:25:11 raspberrypi vncserver-x11[8898]: TcpListenerManager: not listening on [::1]::5900: bind: Cannot assign requested address (99)

::1是IPv6与127.0.0.1的等价物。因此，如果您禁用了IPv6，那么是的，听::1变得不可能了。

你有两个选择：

• 首先，在我看来，推荐的是重新启用IPv6。在现代世界中，没有真正的理由禁用IPv6 (事实上，几年后，如果没有IPv6，您可能无法访问互联网)，而且它可能会引起比这个更多的问题。
• 配置vncserver-x11，使其不再试图侦听::1或任何其他IPv6地址(::将是最有可能的其他候选地址)。

vncserver-x11-serviced似乎是特定于RealVNC的，我找不到任何说明如何为其配置侦听地址的文档，因此您可能需要自己找出最后一点。

Answer 2

Jan 21 14:25:11 raspberrypi vncserver-x11[8898]: TcpListenerManager: not accepting connections: failed to listen on at least one address.
Jan 21 14:25:11 raspberrypi vncserver-x11[8898]: TcpListenerManager: not listening on [::1]::5900: bind: Cannot assign requested address (99)

侦听地址无效。端口应该用一个:与地址分开，而不是在IPv6地址中用作缩略语的双::。

无论您在何处配置了[::1]::5900，都要更改为[::1]:5900

Answer 3

我禁用了ipv6，使用-IpListenAddresses=0.0.0.0修复了RealVnc的相同问题。

确保从参数中删除-localhost

以下是参数详细信息

IpListenAddresses -逗号分隔的IP地址列表，用于侦听TCP/UDP连接，或空以侦听所有可用的IP地址。注意，如果localhost参数设置为True，则忽略此参数。(default=)