处理ftp服务器在重启后ftp客户端不能连接访问的问题

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1：环境：centos7

2：当在重启centos7 linux服务器后，再连接ftp客户端不能链接

此时需要检查以下几点：

2-1：核查ftp服务是否启动正常：

  1 [root@localhost ~]# service vsftpd status
  2 Redirecting to /bin/systemctl status  vsftpd.service
  3 ● vsftpd.service - Vsftpd ftp daemon
  4    Loaded: loaded (/usr/lib/systemd/system/vsftpd.service; enabled; vendor preset: disabled)
  5    Active: active (running) since Fri 2017-08-25 09:20:59 CST; 30s ago
  6   Process: 4517 ExecStart=/usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf (code=exited, status=0/SUCCESS)
  7  Main PID: 4520 (vsftpd)
  8    CGroup: /system.slice/vsftpd.service
  9            └─4520 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
 10 
 11 Aug 25 09:20:59 localhost.localdomain systemd[1]: Starting Vsftpd ftp daemon...
 12 Aug 25 09:20:59 localhost.localdomain systemd[1]: Started Vsftpd ftp daemon.
 13

如果是ftp服务没有启动起来：则需要执行启动命令

  1 service vsftpd restart

或者是设置ftp服务开机自动启动；如何设置请参考《CentOS7 搭建FTP服务器》的“七：解决 linux系统重启后用ftp工具无法访问的问题”的内容

2-2:核查firewall防火墙是否启动正常：

  1 [root@localhost ~]# systemctl status firewalld.service
  2 ● firewalld.service - firewalld - dynamic firewall daemon
  3    Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor preset: enabled)
  4    Active: active (running) since Fri 2017-08-25 09:00:20 CST; 25min ago
  5      Docs: man:firewalld(1)
  6  Main PID: 803 (firewalld)
  7    CGroup: /system.slice/firewalld.service
  8            └─803 /usr/bin/python -Es /usr/sbin/firewalld --nofork --nopid
  9 
 10 Aug 25 09:00:13 localhost.localdomain systemd[1]: Starting firewalld - dynamic firewall daemon...
 11 Aug 25 09:00:20 localhost.localdomain systemd[1]: Started firewalld - dynamic firewall daemon.
 12

如果是firewall 服务没有启动起来，则需要手动启动

  1 [root@localhost ~]# systemctl restart firewalld.service
  2 #并核查下 启动的端口情况  
  3 [root@localhost ~]# firewall-cmd --zone=public --list-ports
  4 80/tcp 8080/tcp
  5 #如果没有自己想要的端口，则添加端口，然后在重启firewall
  6 [root@localhost ~]# firewall-cmd --zone=public --add-port=21/tcp --permanent  
  7 success
  8 [root@localhost ~]# systemctl restart firewalld.service
  9 [root@localhost ~]# firewall-cmd --zone=public --list-ports
 10 21/tcp 80/tcp 8080/tcp
 11

2-3:核查iptables 的状态是否启动正常。

  1 [root@localhost ~]# service iptables status
  2 Redirecting to /bin/systemctl status  iptables.service
  3 ● iptables.service - IPv4 firewall with iptables
  4    Loaded: loaded (/usr/lib/systemd/system/iptables.service; enabled; vendor preset: disabled)
  5    Active: inactive (dead)
  6 [root@localhost ~]# 
  7

如果没有正常启动，则需要手动启动该服务。

  1 [root@localhost ~]# service iptables restart 
  2

设置正常开机启动该服务：

  1 [root@localhost ~]# cd /etc/rc.d
  2 [root@localhost rc.d]# ls
  3 init.d  rc0.d  rc1.d  rc2.d  rc3.d  rc4.d  rc5.d  rc6.d  rc.local
  4 [root@localhost rc.d]# cat rc.local 
  5 #!/bin/bash
  6 # THIS FILE IS ADDED FOR COMPATIBILITY PURPOSES
  7 #
  8 # It is highly advisable to create own systemd services or udev rules
  9 # to run scripts during boot instead of using this file.
 10 #
 11 # In contrast to previous versions due to parallel execution during boot
 12 # this script will NOT be run after all other services.
 13 #
 14 # Please note that you must run 'chmod +x /etc/rc.d/rc.local' to ensure
 15 # that this script will be executed during boot.
 16 
 17 touch /var/lock/subsys/local
 18 
 19 
 20 
 21 /etc/init.d/nginx start
 22 [root@localhost rc.d]# vi  rc.local 
 23

在rc.loal 文件中添加 service iptables restart 确定命令

以下是红色标注的内容是添加的启动iptables服务的内容

  1 [root@localhost ~]# cd /etc/rc.d/
  2 [root@localhost rc.d]# ls
  3 init.d  rc0.d  rc1.d  rc2.d  rc3.d  rc4.d  rc5.d  rc6.d  rc.local
  4 [root@localhost rc.d]# cat rc.local 
  5 #!/bin/bash
  6 # THIS FILE IS ADDED FOR COMPATIBILITY PURPOSES
  7 #
  8 # It is highly advisable to create own systemd services or udev rules
  9 # to run scripts during boot instead of using this file.
 10 #
 11 # In contrast to previous versions due to parallel execution during boot
 12 # this script will NOT be run after all other services.
 13 #
 14 # Please note that you must run 'chmod +x /etc/rc.d/rc.local' to ensure
 15 # that this script will be executed during boot.
 16 
 17 touch /var/lock/subsys/local
 18 
 19 
 20 #开机默认启动nginx服务
 21 /etc/init.d/nginx start
 22 #开机重启 ip 防火墙 
 23