分成更小的单元

utils/init.sh

@@ -61,3 +61,14 @@ net.ipv4.tcp_mtu_probing = 1
 net.ipv4.tcp_fastopen = 3
 EOF
 sysctl -p /etc/sysctl.conf
+
+echo "Configuring Firewall..."
+sudo systemctl stop firewalld
+sudo systemctl mask firewalld
+sudo yum install iptables iptables-services -y
+
+sudo /sbin/iptables -I INPUT -p tcp --dport 22 -j ACCEPT
+sudo /sbin/service iptables save
+
+sudo systemctl restart iptables
+sudo systemctl enable iptables.service