(021) 29427411 ext. 12

    By Default Centos REJECT all incoming connection. To open specific port bellow is simple instruction to allow incoming connection from port 80 and 443:

    iptables -A INPUT -p tcp -m tcp --dport 80 -j ACCEPT
    iptables -A INPUT -p tcp -m tcp --dport 443 -j ACCEPT
    service iptables save
    service iptables restart
    iptables -vnL
    pkts bytes target     prot opt in     out     source               destination         
        0     0 ACCEPT     tcp  --  *      *              tcp dpt:80
      131 21120 ACCEPT     tcp  --  *      *              tcp dpt:443


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