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Under Linux system firewall's establishment method
  Add date: 07/10/2008   Publishing date: 07/10/2008   Hits: 26
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The revision firewall disposition needs to revise /etc/sysconfig/iptables this document, if which port can open, increases one in inside.

- A RH-Firewall-1-INPUT - m state --state NEW - m tcp - p tcp --dport 1521 - j ACCEPT

Might, 1521 were the port numbers which must open, then started linux the firewall service.

Stop/start firewall service order:

Registers after root, execution

service iptables stop --Stop

service iptables start --Start

(service order located at /sbin)

Firewall rule only then in iptables service movement time can activate. Must start the service manually, uses following orders:

/sbin rvice iptables restart

Must guarantee it when system guidance starts, uses following orders:

/sbin/chkconfig --level 345 iptables on

the ipchains service cannot also move with the iptables service. Must determine that the ipchains service is forbid, carries out the following order:

/sbin/chkconfig --level 345 ipchains off
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