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기본 설정cp /etc/sysconfig/iptables /etc/sysconfig/iptables_org  기본 open 포트TCP 80, 22, 1985,  vi /etc/sysconfig/iptables # 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 AC..

1. 설정 변경 vi /etc/sysconfig/iptables  ## 재시작 ##service iptables restart ## 저장 ##service iptables save 2. 기본 설정값 # you can edit this manually or use system-config-systemctl mask firewalld# please do not ask us to add additional ports/services to this default configuration*filter:INPUT ACCEPT [0:0]:FORWARD ACCEPT [0:0]:OUTPUT ACCEPT [0:0]-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT-A INP..