iptables command

I‘ve setup FTP server at port 21 and 40000:41000 as range of passive ftp. How do I control outgoing traffic for the FTP server/service running on my Debian/CentOS/Ubuntu Linux server?

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How do I disable firewall on CentOS or Red Hat Enterprise Linux server version 5.x/6.x running on my HP micro server?

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I would like to to delete my iptables based firewall rules under Linux. How do I delete rules individually or all at once under CentOS or Fedora Linux or RHEL based servers?

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How do I connect to my MySQL database server from an other server (say Apache or Tomcat app server) in same VLAN under CentOS / Fedora / RHEL / Redhat Linux?

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How do I install iptables under Redhat (RHEL) or CentOS or Fedora Linux operating systems?

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How do I find or check IP’s that are currently banned using iptables command in Linux? How do I verify that IP address 1.2.3.4 is banned or not in Linux?

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How do I block port number with iptables under Linux operating systems?

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