firewalld

   61  yum install -y httpd firewalld
   62  systemctl enable httpd
   63  systemctl start httpd
   64  echo "This is server1" > /var/www/html/index.html
   65  systemctl mask iptables.service 
   66  systemctl mask ip6tables.service 
   67  systemctl start firewalld
   68  systemctl status firewalld
   69  firewall-cmd --reload 
   70  firewall-cmd --get-default-zone 
   71  firewall-cmd --get-zones
   72  firewall-cmd --list-all
   73  firewall-cmd --list-all-zones 
   74  firewall-cmd --list-services 
   75  firewall-cmd --zone=public --add-port=80/tcp
   76  firewall-cmd --list-all
   77  firewall-cmd --zone=internal --list-all
   78  firewall-cmd --reload 
   79  firewall-cmd --list-all
   80  firewall-cmd --permanent --zone=public --add-port=80/tcp
   81  firewall-cmd --reload 
   82  firewall-cmd --list-all
   83  firewall-cmd --permanent --remove-port=80/tcp
   84  firewall-cmd --reload 
   85  firewall-cmd --list-all
   86  firewall-cmd --permanent --add-source=10.0.0.100/24
   87  firewall-cmd --reload 
   88  firewall-cmd --zone=internal --list-all
   89  ip a s
   90  firewall-cmd --permanent --zone=internal --add-port=80/tcp
   91  firewall-cmd --reload 
   92  ip a s
   93  systemctl status httpd
   94  curl localhost
   95  firewall-cmd --permanent --zone=internal --add-source=10.0.0.100/24
   96  firewall-cmd --permanent --remove-source=10.0.0.100/24
   97  firewall-cmd --permanent --zone=internal --add-source=10.0.0.100/24
   98  firewall-cmd --reload 
   99  firewall-cmd --list-all --zone=internal 
   100 firewall-cmd --panic-on