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无法执行 cgi 脚本获取 muxserver_listen bind()：权限被拒绝

tag-icon • tag-icon apache-2.2 perl
无法执行 cgi 脚本获取 muxserver_listen bind()：权限被拒绝

当我从浏览器运行 perl CGI 脚本时，Apache 错误日志中出现以下错误。它未从服务器获得响应。当我从命令提示符运行脚本时，它运行正常。

我在我的 perl CGI 脚本中使用下面的代码

my %opts = (
    user        => "uname",
    password    => "password",
    ctl_dir     => "/tmp/.libnet-openssh-perl",
    strict_mode => 0,
);

my $ssh = Net::OpenSSH->new("192.168.0.201",%opts,master_opts => ['-vvv', -o => "StrictHostKeyChecking=no" ] );
    $ssh->system("ls /home/sysadmin/") or
     die "remote command failed: " . $ssh->error;

错误日志： 

[Tue Jul 01 13:05:52 2014] [error] [client 192.168.0.136] debug3: preferred keyboard-interactive,password\r, referer: 
[Tue Jul 01 13:05:52 2014] [error] [client 192.168.0.136] debug3: authmethod_lookup password\r, referer: 
[Tue Jul 01 13:05:52 2014] [error] [client 192.168.0.136] debug3: remaining preferred: ,password\r, referer: 
[Tue Jul 01 13:05:52 2014] [error] [client 192.168.0.136] debug3: authmethod_is_enabled password\r, referer: 
[Tue Jul 01 13:05:52 2014] [error] [client 192.168.0.136] debug1: Next authentication method: password\r, referer: 
[Tue Jul 01 13:05:52 2014] [error] [client 192.168.0.136] debug3: packet_send2: adding 48 (len 62 padlen 18 extra_pad 64)\r, referer: 
[Tue Jul 01 13:05:52 2014] [error] [client 192.168.0.136] debug2: we sent a password packet, wait for reply\r, referer: 
[Tue Jul 01 13:05:52 2014] [error] [client 192.168.0.136] debug1: Authentication succeeded (password).\r, referer: 
[Tue Jul 01 13:05:52 2014] [error] [client 192.168.0.136] Authenticated to 192.168.0.201 ([192.168.0.201]:22).\r, referer:
[Tue Jul 01 13:05:52 2014] [error] [client 192.168.0.136] debug1: setting up multiplex master socket\r, referer: 
**[Tue Jul 01 13:05:52 2014] [error] [client 192.168.0.136] debug3: muxserver_listen: temporary control path /tmp/.libnet-openssh-perl/sysadmin-192.168.0.2-28537-877268.LF0y9f2rHmaMBPaq\r, referer: 
[Tue Jul 01 13:05:52 2014] [error] [client 192.168.0.136] muxserver_listen bind(): Permission denied\r, referer: 
[Tue Jul 01 13:05:52 2014] [error] [client 192.168.0.136] remote command failed: unable to establish master SSH connection: bad password or master process exited unexpectedly at /var/cgi-bin1/GnipReplay.cgi line 43., referer:

答案1

如果您在 RHEL 或 CentOS 上运行，SELinux 可能会阻止脚本启动网络连接。

使用 确认您正在以强制模式运行 SELinux getenforce。

将 SELinux 暂时设置为宽容模式，测试问题是否消失：setenforce 0

如果您现在重试并且您的脚本有效，那么您就找到了罪魁祸首。

恢复 SELinuxsetenforce 1并尝试设置 SELinux 布尔值之一是否可以解决您的问题。在 RHEL/CentOS 6 上setsebool -P httpd_can_network_connect=1可能有一个。

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