All available options are explained in the extensively documented configuration file.
The external interface of the system needs to be set up properly in the firewalls configuration file (EXT_IF). The default behavior of the firewall is to deny all incoming connection attempts.
For additional requirements not covered by the configuration file custom iptables rules can be placed in /etc/arno-iptables-firewall/custom-rules. This file is automatically parsed by the service script.
See the documentation in /usr/share/doc/arno-iptables-firewall for an example how to manage logging of firewall events through syslogd.
The arno-fwfilter script can be used to make the firewall logs more readable for humans (see manpage).
There is currently only very limited support for IPv6. More precisely one can only allow or deny IPv6 traffic completely, but filtering is not possible (yet).
Several plugins for the firewall script are available online. All plugins can be downloaded from http://rocky.eld.leidenuniv.nl/iptables-firewall/plugins and have to be stored in /etc/arno-iptables-firewall/plugins. Please see the documentation in /usr/share/doc/arno-iptables-firewall to learn about how to enable them.
/etc/init.d/arno-iptables-firewall system service script /etc/arno-iptables-firewall/firewall.conf firewall configuration /etc/arno-iptables-firewall/custom-rules custom iptables rules /etc/arno-iptables-firewall/blocked-hosts host blacklist /etc/arno-iptables-firewall/mac-addresses mac filter list
Please note, that the last two files do exist in the initial configuration and their use is disabled in /etc/arno-iptables-firewall/firewall.conf
The http://rocky.eld.leidenuniv.nl/ web site.
This manual page was written by Michael Hanke <firstname.lastname@example.org>, for the Debian project (but may be used by others).