1：環境：centos7
2：當在重啟centos7 linux服務器后，再連接ftp客戶端不能鏈接
此時需要檢查以下幾點：
2-1：核查ftp服務是否啟動正常：
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服務沒有啟動起來：則需要執行啟動命令
1 service vsftpd restart
或者是設置ftp服務開機自動啟動；如何設置請參考《CentOS7 搭建FTP服務器》的“七：解決 linux系統重啟后 用ftp工具無法訪問的問題”的內容
2-2:核查firewall防火牆是否啟動正常：
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 服務沒有啟動起來，則需要手動啟動
1 [root@localhost ~]# systemctl restart firewalld.service 2 #並核查下 啟動的端口情況 3 [root@localhost ~]# firewall-cmd --zone=public --list-ports 4 80/tcp 8080/tcp 5 #如果沒有自己想要的端口，則添加端口，然后在重啟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 的狀態是否啟動正常。
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 沒有正常啟動，則需要手動啟動該服務。
1 [root@localhost ~]# service iptables restart 2
設置正常開機啟動該服務：
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 確定命令
以下是 紅色標注的內容是 添加的啟動iptables服務的內容
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 #開機默認啟動nginx服務 21 /etc/init.d/nginx start 22 #開機重啟 ip 防火牆 23service iptables restart
24 [root@localhost rc.d]# 25
如果以上3個服務都啟動正常，則ftp客戶端連接應該是正常的。若還有問題，則需要仔細核查
