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Configure Iptables To Protect The FTP Server

Open file /etc/sysconfig/iptables, enter:
# vi /etc/sysconfig/iptables
Add the following lines, ensuring that they appear before the final LOG and DROP lines for the RH-Firewall-1-INPUT:

-A RH-Firewall-1-INPUT -m state --state NEW -p tcp --dport 21 -j ACCEPT

Save and close the file. Restart firewall:


# service iptables restart



(출처 : Red Hat / CentOS VSFTPD FTP Server Configuration)

Anonymous 접속을 허락하지 않는다면,

/etc/vsftpd/vsftpd.conf
anonymous_enable=NO