Firewall configuration in cooperation with system-config-securitylevel

[Jochen Wiedmann]

Hi,

I would like to do some basic firewall configuration, which extends
the possibilities of system-config-securitylevel. For example, I would
like to add one additionl open port for a single network only.

In order to achieve this, do I have to disable /etc/init.d/iptables
and provide my own startup script? Or is it possible, to stop
system-config-securitylevel from updating /etc/sysconfig/iptables? Or,
even better, do I have a possibility to add rules to that file without
interaction with system-config-securitylevel?

Regards,

Jochen


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Sum. Cogitone?