Fedora 19: FirewallD and network bridge

[Anthony Messina]

On Friday, August 23, 2013 05:24:02 PM Mateusz Marzantowicz wrote:
> I'd like to configure FirewallD to protect qemu/kvm host and maybe
> guests but the second one is not so important for me because each guest
> has it's own firewall.
> 
> What I don't understand is how FirewallD works with network bridges.
> Currently, I have bridge (br0) in trusted zone to allow as much traffic
> as possible, and p3p1 (which is NIC connected to switch) in public zone.
> When I put bridge in public zone I cut off networking from guests.
> 
> My question is, should I change rules on bridge or p3p1 and what is the
> correlation between them? What should I configure to pass networking
> traffic to guests but protect all ports on host system?

Take a look at

http://wiki.libvirt.org/page/Networking#Fedora.2FRHEL_Bridging
https://bugzilla.redhat.com/show_bug.cgi?id=512206

I believe the default now is to set the following to disable netfiltering 
traffic for the bridge:

sysctl
 net.bridge.bridge-nf-call-ip6tables = 0
 net.bridge.bridge-nf-call-iptables = 0
 net.bridge.bridge-nf-call-arptables = 0

Then your firewall only needs to consider p3p1.  The hosts on the VM side of 
the bridge will need their own firewalls.  -A

-- 
Anthony - http://messinet.com - http://messinet.com/~amessina/gallery
8F89 5E72 8DF0 BCF0 10BE 9967 92DC 35DC B001 4A4E
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 198 bytes
Desc: This is a digitally signed message part.
URL: <http://lists.fedoraproject.org/pipermail/users/attachments/20130824/b4e761c2/attachment.sig>