8:15 p.m.
Signed-off-by: Aleksandr Alekseev <alexander.alekseev(a)virtuozzo.com>
---
src/nwfilter/xml/allow-dhcpv6-server.xml | 27 ++++++++++++++++++++++++
src/nwfilter/xml/allow-dhcpv6.xml | 24 +++++++++++++++++++++
src/nwfilter/xml/allow-incoming-ipv6.xml | 3 +++
src/nwfilter/xml/allow-ipv6.xml | 3 +++
src/nwfilter/xml/meson.build | 6 ++++++
src/nwfilter/xml/no-ipv6-multicast.xml | 9 ++++++++
src/nwfilter/xml/no-ipv6-spoofing.xml | 15 +++++++++++++
7 files changed, 87 insertions(+)
create mode 100644 src/nwfilter/xml/allow-dhcpv6-server.xml
create mode 100644 src/nwfilter/xml/allow-dhcpv6.xml
create mode 100644 src/nwfilter/xml/allow-incoming-ipv6.xml
create mode 100644 src/nwfilter/xml/allow-ipv6.xml
create mode 100644 src/nwfilter/xml/no-ipv6-multicast.xml
create mode 100644 src/nwfilter/xml/no-ipv6-spoofing.xml
diff --git a/src/nwfilter/xml/allow-dhcpv6-server.xml
b/src/nwfilter/xml/allow-dhcpv6-server.xml
new file mode 100644
index 0000000000..214a95f412
--- /dev/null
+++ b/src/nwfilter/xml/allow-dhcpv6-server.xml
@@ -0,0 +1,27 @@
+<filter name='allow-dhcpv6-server' chain='ipv6'>
+
+ <!-- accept outgoing DHCP requests.
+ note, this rule must be evaluated before general MAC broadcast
+ traffic is discarded since DHCP requests use MAC broadcast.
+ according to https://tools.ietf.org/html/rfc3315#section-14,
+ client sends messages to FF02::1:2 from link-local addresses -->
+ <rule action='accept' direction='out' priority='100'>
+ <ipv6 protocol='udp'
+ srcipaddr='FE80::'
+ srcipmask='10'
+ dstipaddr='FF02::1:2'
+ srcportstart='546'
+ dstportstart='547'/>
+ </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' >
+ <ipv6 srcipaddr='$DHCPSERVER'
+ protocol='udp'
+ srcportstart='547'
+ dstportstart='546'/>
+ </rule>
+
+</filter>
diff --git a/src/nwfilter/xml/allow-dhcpv6.xml b/src/nwfilter/xml/allow-dhcpv6.xml
new file mode 100644
index 0000000000..f3512af153
--- /dev/null
+++ b/src/nwfilter/xml/allow-dhcpv6.xml
@@ -0,0 +1,24 @@
+<filter name='allow-dhcpv6' chain='ipv6'>
+
+ <!-- accept outgoing DHCP requests.
+ note, this rule must be evaluated before general MAC broadcast
+ traffic is discarded since DHCP requests use MAC broadcast.
+ according to https://tools.ietf.org/html/rfc3315#section-14,
+ client sends messages to FF02::1:2 from link-local addresses -->
+ <rule action='accept' direction='out' priority='100'>
+ <ipv6 protocol='udp'
+ srcipaddr='FE80::'
+ srcipmask='10'
+ dstipaddr='FF02::1:2'
+ srcportstart='546'
+ dstportstart='547'/>
+ </rule>
+
+ <!-- accept incoming DHCP responses from any DHCP server -->
+ <rule action='accept' direction='in' priority='100' >
+ <ipv6 protocol='udp'
+ srcportstart='547'
+ dstportstart='546'/>
+ </rule>
+
+</filter>
diff --git a/src/nwfilter/xml/allow-incoming-ipv6.xml
b/src/nwfilter/xml/allow-incoming-ipv6.xml
new file mode 100644
index 0000000000..93e1b18784
--- /dev/null
+++ b/src/nwfilter/xml/allow-incoming-ipv6.xml
@@ -0,0 +1,3 @@
+<filter name='allow-incoming-ipv6' chain='ipv6'>
+ <rule direction='in' action='accept'/>
+</filter>
diff --git a/src/nwfilter/xml/allow-ipv6.xml b/src/nwfilter/xml/allow-ipv6.xml
new file mode 100644
index 0000000000..8da5188cb9
--- /dev/null
+++ b/src/nwfilter/xml/allow-ipv6.xml
@@ -0,0 +1,3 @@
+<filter name='allow-ipv6' chain='ipv6'>
+ <rule direction='inout' action='accept'/>
+</filter>
diff --git a/src/nwfilter/xml/meson.build b/src/nwfilter/xml/meson.build
index 95af75bb15..0d96c54ebe 100644
--- a/src/nwfilter/xml/meson.build
+++ b/src/nwfilter/xml/meson.build
@@ -2,8 +2,12 @@ nwfilter_xml_files = [
'allow-arp.xml',
'allow-dhcp-server.xml',
'allow-dhcp.xml',
+ 'allow-dhcpv6-server.xml',
+ 'allow-dhcpv6.xml',
'allow-incoming-ipv4.xml',
+ 'allow-incoming-ipv6.xml',
'allow-ipv4.xml',
+ 'allow-ipv6.xml',
'clean-traffic-gateway.xml',
'clean-traffic.xml',
'no-arp-ip-spoofing.xml',
@@ -11,6 +15,8 @@ nwfilter_xml_files = [
'no-arp-spoofing.xml',
'no-ip-multicast.xml',
'no-ip-spoofing.xml',
+ 'no-ipv6-multicast.xml',
+ 'no-ipv6-spoofing.xml',
'no-mac-broadcast.xml',
'no-mac-spoofing.xml',
'no-other-l2-traffic.xml',
diff --git a/src/nwfilter/xml/no-ipv6-multicast.xml
b/src/nwfilter/xml/no-ipv6-multicast.xml
new file mode 100644
index 0000000000..a736366374
--- /dev/null
+++ b/src/nwfilter/xml/no-ipv6-multicast.xml
@@ -0,0 +1,9 @@
+<filter name='no-ipv6-multicast' chain='ipv6'>
+
+ <!-- drop if destination IP address is in the ff00::/8 subnet -->
+ <rule action='drop' direction='out'>
+ <ipv6 dstipaddr='FF00::' dstipmask='8' />
+ </rule>
+
+ <!-- not doing anything with receiving side ... -->
+</filter>
diff --git a/src/nwfilter/xml/no-ipv6-spoofing.xml
b/src/nwfilter/xml/no-ipv6-spoofing.xml
new file mode 100644
index 0000000000..a9ca690345
--- /dev/null
+++ b/src/nwfilter/xml/no-ipv6-spoofing.xml
@@ -0,0 +1,15 @@
+<filter name='no-ipv6-spoofing' chain='ipv6-ip'
priority='-610'>
+ <!-- allow UDP sent from link-local addresses (DHCP);
+ filter more exact later -->
+ <rule action='return' direction='out' priority='100'>
+ <ipv6 srcipaddr='FE80::' srcipmask='10'
protocol='udp'/>
+ </rule>
+
+ <!-- allow all known IP addresses -->
+ <rule direction='out' action='return' priority='500'>
+ <ipv6 srcipaddr='$IPV6'/>
+ </rule>
+
+ <!-- drop everything else -->
+ <rule direction='out' action='drop' priority='1000'/>
+</filter>
--
2.28.0.97.gdc04167d37