这是因为防火墙的原因，把响应端口开启就行了。
# Firewall configuration written by system-config-firewall
# Manual customization of this file is not recommended.
*filter :INPUT ACCEPT [0:0] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [0:0] -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT -A INPUT -p icmp -j ACCEPT -A INPUT -i lo -j ACCEPT #mysql port -A INPUT -m state --state NEW -m tcp -p tcp --dport 3306 -j ACCEPT #nginx -A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT #tomcat -A INPUT -m state --state NEW -m tcp -p tcp --dport 8080 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 5005 -j ACCEPT #ssh port -A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT #vsftpd -A INPUT -m state --state NEW -m tcp -p tcp --dport 61001:62000 -j ACCEPT -A OUTPUT -m state --state NEW -m tcp -p tcp --sport 61001:62000 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 20 -j ACCEPT -A OUTPUT -m state --state NEW -m tcp -p tcp --sport 20 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 21 -j ACCEPT -A OUTPUT -m state --state NEW -m tcp -p tcp --sport 21 -j ACCEPT -A INPUT -j REJECT --reject-with icmp-host-prohibited -A FORWARD -j REJECT --reject-with icmp-host-prohibited COMMIT
二、参考文件
