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Add some examples filters

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This patch adds some example filters to libvirt. They are automatically
installed into the proper directory for libvirt to pick them up.
This commit is contained in:
Stefan Berger 2010-03-25 13:46:13 -04:00 committed by Daniel P. Berrange
parent 1130085cf0
commit e3a7137ac2
15 changed files with 170 additions and 2 deletions
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3
Makefile.am
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@ -5,7 +5,8 @@ GENHTML = genhtml
SUBDIRS = gnulib/lib include src daemon tools proxy docs gnulib/tests \
python tests po examples/domain-events/events-c examples/hellolibvirt \
examples/dominfo examples/domsuspend examples/python examples/apparmor
examples/dominfo examples/domsuspend examples/python examples/apparmor \
examples/xml/nwfilter
ACLOCAL_AMFLAGS = -I m4 -I gnulib/m4

3
configure.ac
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@ -1987,7 +1987,8 @@ AC_OUTPUT(Makefile src/Makefile include/Makefile docs/Makefile \
examples/domsuspend/Makefile \
examples/dominfo/Makefile \
examples/python/Makefile \
examples/hellolibvirt/Makefile)
examples/hellolibvirt/Makefile \
examples/xml/nwfilter/Makefile)
AC_MSG_NOTICE([])
AC_MSG_NOTICE([Configuration summary])

30
examples/xml/nwfilter/Makefile.am Normal file
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@ -0,0 +1,30 @@
FILTERS = \
allow-arp.xml \
allow-dhcp-server.xml \
allow-dhcp.xml \
allow-incoming-ipv4.xml \
allow-ipv4.xml \
clean-traffic.xml \
no-arp-spoofing.xml \
no-ip-multicast.xml \
no-ip-spoofing.xml \
no-mac-broadcast.xml \
no-mac-spoofing.xml \
no-other-l2-traffic.xml
confdir = $(sysconfdir)/libvirt
NWFILTER_DIR = "$(DESTDIR)$(sysconfdir)/libvirt/nwfilter"
install-data-local:
$(MKDIR_P) "$(NWFILTER_DIR)"
for f in $(FILTERS); do \
$(INSTALL_DATA) $$f "$(NWFILTER_DIR)"; \
done
uninstall-local::
for f in $(FILTERS); do \
rm -f "$(NWFILTER_DIR)/$$f"; \
done
-test -z $(shell ls $(NWFILTER_DIR)) || rmdir $(NWFILTER_DIR)

3
examples/xml/nwfilter/allow-arp.xml Normal file
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@ -0,0 +1,3 @@
<filter name='allow-arp' chain='arp'>
<rule direction='inout' action='accept'/>
</filter>

24
examples/xml/nwfilter/allow-dhcp-server.xml Normal file
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@ -0,0 +1,24 @@
<filter name='allow-dhcp-server' chain='ipv4'>
<!-- accept outgoing DHCP requests -->
<!-- note, this rule must be evaluated before general MAC broadcast
traffic is discarded since DHCP requests use MAC broadcast -->
<rule action='accept' direction='out' priority='100'>
<ip srcipaddr='0.0.0.0'
dstipaddr='255.255.255.255'
protocol='udp'
srcportstart='68'
dstportstart='67' />
</rule>
<!-- accept incoming DHCP responses from a specific DHCP server
parameter DHPCSERVER needs to be passed from where this filter is
referenced -->
<rule action='accept' direction='in' priority='100' >
<ip srcipaddr='$DHCPSERVER'
protocol='udp'
srcportstart='67'
dstportstart='68'/>
</rule>
</filter>

21
examples/xml/nwfilter/allow-dhcp.xml Normal file
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@ -0,0 +1,21 @@
<filter name='allow-dhcp' chain='ipv4'>
<!-- accept outgoing DHCP requests -->
<!-- not, this rule must be evaluated before general MAC broadcast
traffic is discarded since DHCP requests use MAC broadcast -->
<rule action='accept' direction='out' priority='100'>
<ip srcipaddr='0.0.0.0'
dstipaddr='255.255.255.255'
protocol='udp'
srcportstart='68'
dstportstart='67' />
</rule>
<!-- accept incoming DHCP responses from any DHCP server -->
<rule action='accept' direction='in' priority='100' >
<ip protocol='udp'
srcportstart='67'
dstportstart='68'/>
</rule>
</filter>

3
examples/xml/nwfilter/allow-incoming-ipv4.xml Normal file
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@ -0,0 +1,3 @@
<filter name='allow-incoming-ipv4' chain='ipv4'>
<rule direction='in' action='accept'/>
</filter>

3
examples/xml/nwfilter/allow-ipv4.xml Normal file
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@ -0,0 +1,3 @@
<filter name='allow-ipv4' chain='ipv4'>
<rule direction='inout' action='accept'/>
</filter>

17
examples/xml/nwfilter/clean-traffic.xml Normal file
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@ -0,0 +1,17 @@
<filter name='clean-traffic'>
<!-- 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, allow all IPv4 in incoming -->
<filterref filter='no-ip-spoofing'/>
<filterref filter='allow-incoming-ipv4'/>
<!-- preventing ARP spoofing/poisoning -->
<filterref filter='no-arp-spoofing'/>
<!-- preventing any other traffic than IPv4 and ARP -->
<filterref filter='no-other-l2-traffic'/>
</filter>

29
examples/xml/nwfilter/no-arp-spoofing.xml Normal file
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@ -0,0 +1,29 @@
<filter name='no-arp-spoofing' chain='arp'>
<uuid>f88f1932-debf-4aa1-9fbe-f10d3aa4bc95</uuid>
<!-- no arp spoofing -->
<!-- drop if ipaddr or macaddr does not belong to guest -->
<rule action='drop' direction='out' priority='400' >
<arp match='no' arpsrcmacaddr='$MAC'/>
</rule>
<rule action='drop' direction='out' priority='400' >
<arp match='no' arpsrcipaddr='$IP' />
</rule>
<!-- drop if ipaddr or macaddr odes not belong to guest -->
<rule action='drop' direction='in' priority='400' >
<arp match='no' arpdstmacaddr='$MAC'/>
<arp opcode='reply'/>
</rule>
<rule action='drop' direction='in' priority='400' >
<arp match='no' arpdstipaddr='$IP' />
</rule>
<!-- accept only request or reply packets -->
<rule action='accept' direction='inout' priority='500' >
<arp opcode='request'/>
</rule>
<rule action='accept' direction='inout' priority='500' >
<arp opcode='reply'/>
</rule>
<!-- drop everything else -->
<rule action='drop' direction='inout' priority='1000' />
</filter>

9
examples/xml/nwfilter/no-ip-multicast.xml Normal file
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@ -0,0 +1,9 @@
<filter name='no-ip-multicast' chain='ipv4'>
<!-- drop if destination IP address is in the 224.0.0.0/4 subnet -->
<rule action='drop' direction='out'>
<ip dstipaddr='224.0.0.0' dstipmask='4' />
</rule>
<!-- not doing anything with receiving side ... -->
</filter>

7
examples/xml/nwfilter/no-ip-spoofing.xml Normal file
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@ -0,0 +1,7 @@
<filter name='no-ip-spoofing' chain='ipv4'>
<!-- drop if srcipaddr is not the IP address of the guest -->
<rule action='drop' direction='out'>
<ip match='no' srcipaddr='$IP' />
</rule>
</filter>

8
examples/xml/nwfilter/no-mac-broadcast.xml Normal file
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@ -0,0 +1,8 @@
<filter name='no-mac-broadcast' chain='ipv4'>
<!-- drop if destination mac is bcast mac addr. -->
<rule action='drop' direction='out'>
<mac dstmacaddr='ff:ff:ff:ff:ff:ff' />
</rule>
<!-- not doing anything with receiving side ... -->
</filter>

5
examples/xml/nwfilter/no-mac-spoofing.xml Normal file
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@ -0,0 +1,5 @@
<filter name='no-mac-spoofing' chain='ipv4'>
<rule action='drop' direction='out' priority='10'>
<mac match='no' srcmacaddr='$MAC' />
</rule>
</filter>

7
examples/xml/nwfilter/no-other-l2-traffic.xml Normal file
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@ -0,0 +1,7 @@
<filter name='no-other-l2-traffic'>
<!-- drop all other l2 traffic than for which rules have been
written for; i.e., drop all other than arp and ipv4 traffic -->
<rule action='drop' direction='inout' priority='1000'/>
</filter>