1521 포트 허용정책 추가하기# vi /etc/sysconfig/iptables-A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT-A INPUT -m state --state NEW -m tcp -p tcp --dport 1521 -j ACCEPT-A INPUT -j REJECT --reject-with icmp-host-prohibited # service iptables restart