問題描述

• 使用ftp命令測試發現，可以正常登錄，但不能使用ls、dir等命令

PS C:\Users\dadei> ftp 192.168.0.15 連接到 192.168.0.15。 220 Welcome to lmes FTP service. 200 Always in UTF8 mode. 用戶(192.168.0.15:(none)): dduan 331 Please specify the password. 密碼: 230 Login successful. ftp> ls 200 PORT command successful. Consider using PASV. 425 Failed to establish connection.

問題原因

200 PORT command successful. Consider using PASV.
425 Failed to establish connection.

提示信息可以知道，主要問題在端口被防火墻控住

解決辦法

CentOS、RedHat

• 修改/etc/selinux/config文件中的SELINUX="為disabled"，然后重啟

# This file controls the state of SELinux on the system. # SELINUX= can take one of these three values: # enforcing - SELinux security policy is enforced. # permissive - SELinux prints warnings instead of enforcing. # disabled - No SELinux policy is loaded. SELINUX=disabled # SELINUXTYPE= can take one of three values: # targeted - Targeted processes are protected, # minimum - Modification of targeted policy. Only selected processes are protected. # mls - Multi Level Security protection. SELINUXTYPE=targeted

Ubuntu

• 在 /etc/vsftpd/vsftpd.conf添加如下內容

# 開啟被動模式 pasv_enable=YES # 被動模式最小端口 pasv_min_port=6000 # 被動模式最大端口 pasv_max_port=7000

• 將6000-7000端口也寫入到iptables中白名單中

sudo iptables -A INPUT -p tcp --dport 6000:7000 -j ACCEPT

總結

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