centos7 iptable 사용하기

# systemctl stop firewalld  (firewalld 중지)

# systemctl mask firewalld
Created symlink from /etc/systemd/system/firewalld.service to /dev/null.

# systemctl status firewalld (서비스 상태 확인)
● firewalld.service
Loaded: masked (/dev/null; bad)
Active: inactive (dead) since 수 2019-09-25 15:21:35 KST; 1min 18s ago
Main PID: 765 (code=exited, status=0/SUCCESS)

# systemctl list-units | grep firewalld

# systemctl enable iptables
Created symlink from /etc/systemd/system/basic.target.wants/iptables.service to /usr/lib/systemd/system/iptables.service.

# systemctl start iptables

# systemctl status iptables
● iptables.service – IPv4 firewall with iptables
Loaded: loaded (/usr/lib/systemd/system/iptables.service; enabled; vendor preset: disabled)
Active: active (exited) since 수 2019-09-25 15:45:41 KST; 26s ago
Process: 1886 ExecStart=/usr/libexec/iptables/iptables.init start (code=exited, status=0/SUCCESS)
Main PID: 1886 (code=exited, status=0/SUCCESS)

# systemctl list-units | grep iptables
iptables.service         loaded active exited IPv4 firewall with iptables