[libvirt] [PATCH] examples: Add clean-traffic-gateway into nwfilters

[Ales Musil]

This filter should be used to limit traffic between VMs
based on their MAC adddresses. The MAC address can be
set with GATEWAY_MAC and mask with GATEWAY_MAC_MASK
variable.

Signed-off-by: Ales Musil <amusil at redhat.com>
---
 examples/xml/nwfilter/clean-traffic-gateway.xml | 36 +++++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 examples/xml/nwfilter/clean-traffic-gateway.xml

diff --git a/examples/xml/nwfilter/clean-traffic-gateway.xml b/examples/xml/nwfilter/clean-traffic-gateway.xml
new file mode 100644
index 0000000..d1e7c81
--- /dev/null
+++ b/examples/xml/nwfilter/clean-traffic-gateway.xml
@@ -0,0 +1,36 @@
+<filter name='clean-traffic-gateway'>
+    <!-- An example of a traffic filter enforcing clean traffic
+            from a VM by
+              - preventing MAC spoofing -->
+    <filterref filter='no-mac-spoofing'/>
+
+    <!-- preventing IP spoofing on outgoing -->
+    <filterref filter='no-ip-spoofing'/>
+
+    <!-- preventing ARP spoofing/poisoning -->
+    <filterref filter='no-arp-spoofing'/>
+
+    <!-- accept all other incoming and outgoing ARP traffic -->
+    <rule action='accept' direction='inout' priority='-500'>
+        <mac protocolid='arp'/>
+    </rule>
+
+    <!-- accept traffic only from specified MAC address -->
+    <rule action='accept' direction='in'>
+        <mac match='yes' srcmacaddr='$GATEWAY_MAC'
+             srcmacmask='$GATEWAY_MAC_MASK'/>
+    </rule>
+
+    <!-- allow traffic only to specified MAC address -->
+    <rule action='accept' direction='out'>
+        <mac match='yes' dstmacaddr='$GATEWAY_MAC'
+             dstmacmask='$GATEWAY_MAC_MASK'/>
+    </rule>
+
+    <!-- preventing any other traffic than between specified MACs
+    and ARP -->
+    <filterref filter='no-other-l2-traffic'/>
+
+    <!-- allow qemu to send a self-announce upon migration end -->
+    <filterref filter='qemu-announce-self'/>
+</filter>
-- 
1.8.3.1