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<H1>[Mageia-sysadm] Installing firewall</H1>
<B>nicolas vigier</B>
<A HREF="mailto:mageia-sysadm%40mageia.org?Subject=Re%3A%20%5BMageia-sysadm%5D%20Installing%20firewall&In-Reply-To=%3C20101113001232.GF21938%40mars-attacks.org%3E"
TITLE="[Mageia-sysadm] Installing firewall">boklm at mars-attacks.org
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<I>Sat Nov 13 01:12:33 CET 2010</I>
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<PRE>On Fri, 12 Nov 2010, Olivier Thauvin wrote:
><i> * nicolas vigier (<A HREF="https://www.mageia.org/mailman/listinfo/mageia-sysadm">boklm at mars-attacks.org</A>) wrote:
</I>><i> > Hello,
</I>><i> >
</I>><i> > The Mageia packages repository will be stored on valstar. As the
</I>><i> > repository will be needed on build nodes, it will have to be either
</I>><i> > mirrored or mounted via nfs (readonly). If we use nfs, I think we should
</I>><i> > first setup a firewall before installing the nfs server. A firewall
</I>><i> > would also be useful to filter connections to the pgsql/mysql servers,
</I>><i> > to the build nodes, etc ...
</I>><i> >
</I>><i> > I suggest using shorewall to manage the firewall configuration. Any
</I>><i> > comment about this ?
</I>><i>
</I>><i> I saw you mostly wrote the shorewall, however, I don't like myself
</I>><i> shroewall. Shorewall is nothing more than a set of scripts over iptables
</I>><i> and I think it add a useless complexity over this last one.
</I>><i>
</I>><i> I widelly prefer to use directly iptables. I believe we are experienced
</I>><i> enough to write iptables rules ourself.
</I>
For me, using shorewall is much more simple than writting iptables
rules directly. I always forget iptables parameters, while shorewall
rules are very simple. I don't know if managing iptables rules in puppet
for different hosts would be as simple.
><i>
</I>><i> >
</I>><i> > I plan to write a shorewall module in puppet, test it on jonund first,
</I>><i> > without installing shorewall (only writting the config files), then
</I>><i> > install shorewall on jonund, and if we didn't lose access to jonund
</I>><i> > install it on other nodes.
</I>><i>
</I>><i> Playing with firewall on computer we can access only by network, woot !
</I>><i>
</I>><i> I think access control can be done w/o using iptables.
</I>
Some programs provide access control, but not all, and it is often more
limited than what you can do with a firewall. It can also be more
vulnerable in case of security issue in one of the services. So I think
using a firewall might be better. Especially for build nodes where we
don't know exactly what services will be installed in the chroot and
maybe running during the builds.
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