Firewall 設定

# vim /etc/sysconfig/iptables ⏎

INPUT DROP [0

0]

FORWARD DROP [0

0]

OUTPUT ACCEPT [0

0]

SERVICES - [0

0]

-A INPUT -i lo -j ACCEPT
-A INPUT -p icmp --icmp-type echo-request -m limit --limit 1/s --limit-burst 4 -j ACCEPT
-A INPUT -p tcp -m state --state ESTABLISHED,RELATED -j ACCEPT
-A INPUT -p tcp -m state --state NEW -j SERVICES
-A INPUT -p udp --sport 53 -j ACCEPT
-A INPUT -p udp --sport 123 --dport 123 -j ACCEPT
-A SERVICES -p tcp --dport 10022 -j ACCEPT
-A SERVICES -p tcp --dport 80 -j ACCEPT
-A SERVICES -p tcp --dport 443 -j ACCEPT
COMMIT

[Esc]:wq ⏎

-A SERVICES -p tcp --dport 10022 -j ACCEPT
設定したsshのポート番号

# service iptables restart ⏎
# iptables -L ⏎
設定の確認