问题

镜像中监听了端口，通过-p进行映射后，netstat已经可以看到了，本机访问正常，其他主机无法访问

  1. [root@code1024 ~]# netstat -lutpn
  2. Active Internet connections (only servers)
  3. Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name
  4. tcp        0      0 127.0.0.1:25            0.0.0.0:*               LISTEN      1238/master
  5. tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      1069/sshd
  6. tcp6       0      0 ::1:25                  :::*                    LISTEN      1238/master
  7. tcp6       0      0 :::15080                :::*                    LISTEN      13772/docker-proxy
  8. tcp6       0      0 :::22                   :::*                    LISTEN      1069/sshd
  9. udp        0      0 0.0.0.0:68              0.0.0.0:*                           876/dhclient

示例中的15080端口即为映射的端口

解决

  1. 查看本机ip转发是否开启，0表示未开启

    1. [root@code1024 ~]# sysctl net.ipv4.ip_forward
    2. net.ipv4.ip_forward = 0

  2. 开启转发

在 /etc/sysctl.conf 中添加：net.ipv4.ip_forward=1

  1. [root@code1024 ~]# vi /etc/sysctl.conf
  2. [root@code1024 ~]# cat /etc/sysctl.conf
  3. net.ipv4.ip_forward=1

  1. 重载配置

    1. [root@code1024 ~]# sysctl -p
    2. net.ipv4.ip_forward = 1
    3. [root@code1024 ~]# sysctl net.ipv4.ip_forward
    4. net.ipv4.ip_forward = 1

  2. 再次从外机进行访问已经可以成功了