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sudo /sbin/iptables -F(Í£Ö¹·À»ðǽ)
sudo /sbin/iptables -L -n(²é¿´ÏÖÓеķÀ»ðǽÅäÖÃ)
µÚ¶þ²½:sudo /sbin/iptables -A INPUT -p tcp -m tcp --sport 21 -vj ACCEPT
sudo /sbin/iptables -A OUTPUT -p tcp -m tcp --dport 21 -j ACCEPT
µÚÈý²½:vim /etc/vsftpd.conf
ÐÞ¸ÄÆäÖеÄanonymous_enables=NO
local_enable=YES
listen_port=21
write_enable=YES
anon_upload_enable=NO
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hp = gethostbyname("www.google.com");
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