arno-iptables-firewall - Single- & multi-homed firewall script with
arno-iptables-firewall is an iptables configuration script. While it
is extremely easy to use one can nevertheless use it in quite
All available options are explained in the extensively documented
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
iptables(8), arno-fwfilter(1), syslog.conf(5)
The http://rocky.eld.leidenuniv.nl/ web site.
arno-iptables-firewall was written by Arno van Amersfoort
This manual page was written by Michael Hanke
<email@example.com>, for the Debian project (but may be used by