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author/C=EU/ST=EU/CN=Pablo Neira Ayuso/emailAddress=pablo@netfilter.org </C=EU/ST=EU/CN=Pablo Neira Ayuso/emailAddress=pablo@netfilter.org>2007-04-16 19:08:42 +0000
committer/C=EU/ST=EU/CN=Pablo Neira Ayuso/emailAddress=pablo@netfilter.org </C=EU/ST=EU/CN=Pablo Neira Ayuso/emailAddress=pablo@netfilter.org>2007-04-16 19:08:42 +0000
commit5eb3bc6d5594fccfff26329a26225f999e971652 (patch)
tree242b74bb06e32ef6d9621a73a0010b1c2ab7da4a /examples
parentad31f852c3454136bdbfeb7f222cb9c175f13c1c (diff)
first step forward to merge conntrackd and conntrack into the same building chain
Diffstat (limited to 'examples')
-rw-r--r--examples/Makefile.am1
-rw-r--r--examples/debian.conntrackd.init.d48
-rw-r--r--examples/stats/Makefile.am1
-rw-r--r--examples/stats/conntrackd.conf69
-rw-r--r--examples/sync/Makefile.am1
-rw-r--r--examples/sync/nack/Makefile.am2
-rw-r--r--examples/sync/nack/README1
-rw-r--r--examples/sync/nack/node1/Makefile.am1
-rw-r--r--examples/sync/nack/node1/conntrackd.conf125
-rw-r--r--examples/sync/nack/node1/keepalived.conf38
-rw-r--r--examples/sync/nack/node2/Makefile.am1
-rw-r--r--examples/sync/nack/node2/conntrackd.conf124
-rw-r--r--examples/sync/nack/node2/keepalived.conf38
-rwxr-xr-xexamples/sync/nack/script_backup.sh3
-rwxr-xr-xexamples/sync/nack/script_master.sh5
-rw-r--r--examples/sync/persistent/Makefile.am2
-rw-r--r--examples/sync/persistent/README1
-rw-r--r--examples/sync/persistent/node1/Makefile.am1
-rw-r--r--examples/sync/persistent/node1/conntrackd.conf130
-rw-r--r--examples/sync/persistent/node1/keepalived.conf38
-rw-r--r--examples/sync/persistent/node2/Makefile.am1
-rw-r--r--examples/sync/persistent/node2/conntrackd.conf130
-rw-r--r--examples/sync/persistent/node2/keepalived.conf38
-rwxr-xr-xexamples/sync/persistent/script_backup.sh3
-rwxr-xr-xexamples/sync/persistent/script_master.sh4
25 files changed, 806 insertions, 0 deletions
diff --git a/examples/Makefile.am b/examples/Makefile.am
new file mode 100644
index 0000000..be83d42
--- /dev/null
+++ b/examples/Makefile.am
@@ -0,0 +1 @@
+SUBDIRS = stats sync
diff --git a/examples/debian.conntrackd.init.d b/examples/debian.conntrackd.init.d
new file mode 100644
index 0000000..ba847dd
--- /dev/null
+++ b/examples/debian.conntrackd.init.d
@@ -0,0 +1,48 @@
+#!/bin/sh
+#
+# /etc/init.d/conntrackd
+#
+# Maximilian Wilhelm <max@rfc2324.org>
+# -- Mon, 06 Nov 2006 18:39:07 +0100
+#
+
+export PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
+
+NAME="conntrackd"
+DAEMON=`command -v conntrackd`
+CONFIG="/etc/conntrack/conntrackd.conf"
+PIDFILE="/var/run/${NAME}.pid"
+
+
+# Gracefully exit if there is no daemon (debian way of life)
+if [ ! -x "${DAEMON}" ]; then
+ exit 0
+fi
+
+# Check for config file
+if [ ! -f /etc/conntrackd/conntrackd.conf ]; then
+ echo "Error: There is no config file for $NAME" >&2
+ exit 1;
+fi
+
+case "$1" in
+ start)
+ echo -n "Starting $NAME: "
+ start-stop-daemon --start --quiet --make-pidfile --pidfile "/var/run/${NAME}.pid" --background --exec "${DAEMON}" && echo "done." || echo "FAILED!"
+ ;;
+ stop)
+ echo -n "Stopping $NAME:"
+ start-stop-daemon --stop --quiet --oknodo --pidfile "/var/run/${NAME}.pid" && echo "done." || echo "FAILED!"
+ ;;
+
+ restart)
+ $0 start
+ $0 stop
+ ;;
+
+ *)
+ echo "Usage: /etc/init.d/conntrackd {start|stop|restart}"
+ exit 1
+esac
+
+exit 0
diff --git a/examples/stats/Makefile.am b/examples/stats/Makefile.am
new file mode 100644
index 0000000..b43c3b8
--- /dev/null
+++ b/examples/stats/Makefile.am
@@ -0,0 +1 @@
+EXTRA_DIST = conntrackd.conf
diff --git a/examples/stats/conntrackd.conf b/examples/stats/conntrackd.conf
new file mode 100644
index 0000000..e514ac0
--- /dev/null
+++ b/examples/stats/conntrackd.conf
@@ -0,0 +1,69 @@
+#
+# General settings
+#
+General {
+ #
+ # Number of buckets in the caches: hash table
+ #
+ HashSize 8192
+
+ #
+ # Maximum number of conntracks:
+ # it must be >= $ cat /proc/sys/net/ipv4/netfilter/ip_conntrack_max
+ #
+ HashLimit 65535
+
+ #
+ # Logfile
+ #
+ LogFile /var/log/conntrackd.log
+
+ #
+ # Lockfile
+ #
+ LockFile /var/lock/conntrack.lock
+
+ #
+ # Unix socket configuration
+ #
+ UNIX {
+ Path /tmp/sync.sock
+ Backlog 20
+ }
+
+ #
+ # Netlink socket buffer size
+ #
+ SocketBufferSize 262142
+
+ #
+ # Increase the socket buffer up to maximun if required
+ #
+ SocketBufferSizeMaxGrown 655355
+}
+
+#
+# Ignore traffic for a certain set of IP's: Usually
+# all the IP assigned to the firewall since local
+# traffic must be ignored, just forwarded connections
+# are worth to replicate
+#
+IgnoreTrafficFor {
+ IPv4_address 127.0.0.1 # loopback
+}
+
+#
+# Do not replicate certain protocol traffic
+#
+IgnoreProtocol {
+ UDP
+# ICMP
+# IGMP
+# VRRP
+ # numeric numbers also valid
+}
+
+#
+# Strip NAT traffic
+#
+StripNAT
diff --git a/examples/sync/Makefile.am b/examples/sync/Makefile.am
new file mode 100644
index 0000000..28e7643
--- /dev/null
+++ b/examples/sync/Makefile.am
@@ -0,0 +1 @@
+SUBDIRS = persistent nack
diff --git a/examples/sync/nack/Makefile.am b/examples/sync/nack/Makefile.am
new file mode 100644
index 0000000..6fd99b1
--- /dev/null
+++ b/examples/sync/nack/Makefile.am
@@ -0,0 +1,2 @@
+EXTRA_DIST = script_backup.sh script_master.sh
+SUBDIRS = node1 node2
diff --git a/examples/sync/nack/README b/examples/sync/nack/README
new file mode 100644
index 0000000..66987f7
--- /dev/null
+++ b/examples/sync/nack/README
@@ -0,0 +1 @@
+This directory contains the files for the NACK based protocol
diff --git a/examples/sync/nack/node1/Makefile.am b/examples/sync/nack/node1/Makefile.am
new file mode 100644
index 0000000..edc0ed7
--- /dev/null
+++ b/examples/sync/nack/node1/Makefile.am
@@ -0,0 +1 @@
+EXTRA_DIST = conntrackd.conf keepalived.conf
diff --git a/examples/sync/nack/node1/conntrackd.conf b/examples/sync/nack/node1/conntrackd.conf
new file mode 100644
index 0000000..f24fa7e
--- /dev/null
+++ b/examples/sync/nack/node1/conntrackd.conf
@@ -0,0 +1,125 @@
+#
+# Synchronizer settings
+#
+Sync {
+ Mode NACK {
+ #
+ # Size of the buffer that hold destroy messages for
+ # possible resends (in bytes)
+ #
+ ResendBufferSize 262144
+
+ #
+ # Entries committed to the connection tracking table
+ # starts with a limited timeout of N seconds until the
+ # takeover process is completed.
+ #
+ CommitTimeout 180
+
+ # Set Acknowledgement window size
+ ACKWindowSize 20
+ }
+
+ #
+ # Multicast IP and interface where messages are
+ # broadcasted (dedicated link). IMPORTANT: Make sure
+ # that iptables accepts traffic for destination
+ # 225.0.0.50, eg:
+ #
+ # iptables -I INPUT -d 225.0.0.50 -j ACCEPT
+ # iptables -I OUTPUT -d 225.0.0.50 -j ACCEPT
+ #
+ Multicast {
+ IPv4_address 225.0.0.50
+ IPv4_interface 192.168.100.100 # IP of dedicated link
+ Group 3780
+ Backlog 20
+ }
+
+ # Enable/Disable message checksumming
+ Checksum on
+
+ # Uncomment this if you want to replicate just certain TCP states.
+ # This option introduces a tradeoff in the replication: it reduces
+ # CPU consumption and lost messages rate at the cost of having
+ # backup replicas that don't contain the current state that the active
+ # replica holds. TCP states are: SYN_SENT, SYN_RECV, ESTABLISHED,
+ # FIN_WAIT, CLOSE_WAIT, LAST_ACK, TIME_WAIT, CLOSE, LISTEN.
+ #
+ # Replicate ESTABLISHED TIME_WAIT for TCP
+}
+
+#
+# General settings
+#
+General {
+ #
+ # Number of buckets in the caches: hash table
+ #
+ HashSize 8192
+
+ #
+ # Maximum number of conntracks:
+ # it must be >= $ cat /proc/sys/net/ipv4/netfilter/ip_conntrack_max
+ #
+ HashLimit 65535
+
+ #
+ # Logfile
+ #
+ LogFile /var/log/conntrackd.log
+
+ #
+ # Lockfile
+ #
+ LockFile /var/lock/conntrack.lock
+
+ #
+ # Unix socket configuration
+ #
+ UNIX {
+ Path /tmp/sync.sock
+ Backlog 20
+ }
+
+ #
+ # Netlink socket buffer size
+ #
+ SocketBufferSize 262142
+
+ #
+ # Increase the socket buffer up to maximum if required
+ #
+ SocketBufferSizeMaxGrown 655355
+}
+
+#
+# Ignore traffic for a certain set of IP's: Usually
+# all the IP assigned to the firewall since local
+# traffic must be ignored, just forwarded connections
+# are worth to replicate
+#
+IgnoreTrafficFor {
+ IPv4_address 127.0.0.1 # loopback
+ IPv4_address 192.168.0.1
+ IPv4_address 192.168.1.1
+ IPv4_address 192.168.100.100 # dedicated link ip
+ IPv4_address 192.168.0.100 # virtual IP 1
+ IPv4_address 192.168.1.100 # virtual IP 2
+}
+
+#
+# Do not replicate certain protocol traffic
+#
+IgnoreProtocol {
+ UDP
+ ICMP
+ IGMP
+ VRRP
+ # numeric numbers also valid
+}
+
+#
+# Strip NAT traffic
+#
+StripNAT
diff --git a/examples/sync/nack/node1/keepalived.conf b/examples/sync/nack/node1/keepalived.conf
new file mode 100644
index 0000000..41aa35b
--- /dev/null
+++ b/examples/sync/nack/node1/keepalived.conf
@@ -0,0 +1,38 @@
+vrrp_sync_group G1 { # must be before vrrp_instance declaration
+ group {
+ VI_1
+ VI_2
+ }
+ notify_master /etc/conntrackd/script_master.sh
+ notify_backup /etc/conntrackd/script_backup.sh
+}
+
+vrrp_instance VI_1 {
+ interface eth1
+ state SLAVE
+ virtual_router_id 61
+ priority 80
+ advert_int 3
+ authentication {
+ auth_type PASS
+ auth_pass papas_con_tomate
+ }
+ virtual_ipaddress {
+ 192.168.0.100 # default CIDR mask is /32
+ }
+}
+
+vrrp_instance VI_2 {
+ interface eth0
+ state SLAVE
+ virtual_router_id 62
+ priority 80
+ advert_int 3
+ authentication {
+ auth_type PASS
+ auth_pass papas_con_tomate
+ }
+ virtual_ipaddress {
+ 192.168.1.100
+ }
+}
diff --git a/examples/sync/nack/node2/Makefile.am b/examples/sync/nack/node2/Makefile.am
new file mode 100644
index 0000000..edc0ed7
--- /dev/null
+++ b/examples/sync/nack/node2/Makefile.am
@@ -0,0 +1 @@
+EXTRA_DIST = conntrackd.conf keepalived.conf
diff --git a/examples/sync/nack/node2/conntrackd.conf b/examples/sync/nack/node2/conntrackd.conf
new file mode 100644
index 0000000..4f15773
--- /dev/null
+++ b/examples/sync/nack/node2/conntrackd.conf
@@ -0,0 +1,124 @@
+#
+# Synchronizer settings
+#
+Sync {
+ Mode NACK {
+ #
+ # Size of the buffer that hold destroy messages for
+ # possible resends (in bytes)
+ #
+ ResendBufferSize 262144
+
+ # Entries committed to the connection tracking table
+ # starts with a limited timeout of N seconds until the
+ # takeover process is completed.
+ #
+ CommitTimeout 180
+
+ # Set Acknowledgement window size
+ ACKWindowSize 20
+ }
+
+ #
+ # Multicast IP and interface where messages are
+ # broadcasted (dedicated link). IMPORTANT: Make sure
+ # that iptables accepts traffic for destination
+ # 225.0.0.50, eg:
+ #
+ # iptables -I INPUT -d 225.0.0.50 -j ACCEPT
+ # iptables -I OUTPUT -d 225.0.0.50 -j ACCEPT
+ #
+ Multicast {
+ IPv4_address 225.0.0.50
+ IPv4_interface 192.168.100.200 # IP of dedicated link
+ Group 3780
+ Backlog 20
+ }
+
+ # Enable/Disable message checksumming
+ Checksum on
+
+ # Uncomment this if you want to replicate just certain TCP states.
+ # This option introduces a tradeoff in the replication: it reduces
+ # CPU consumption and lost messages rate at the cost of having
+ # backup replicas that don't contain the current state that the active
+ # replica holds. TCP states are: SYN_SENT, SYN_RECV, ESTABLISHED,
+ # FIN_WAIT, CLOSE_WAIT, LAST_ACK, TIME_WAIT, CLOSE, LISTEN.
+ #
+ # Replicate ESTABLISHED TIME_WAIT for TCP
+}
+
+#
+# General settings
+#
+General {
+ #
+ # Number of buckets in the caches: hash table
+ #
+ HashSize 8192
+
+ #
+ # Maximum number of conntracks:
+ # it must be >= $ cat /proc/sys/net/ipv4/netfilter/ip_conntrack_max
+ #
+ HashLimit 65535
+
+ #
+ # Logfile
+ #
+ LogFile /var/log/conntrackd.log
+
+ #
+ # Lockfile
+ #
+ LockFile /var/lock/conntrack.lock
+
+ #
+ # Unix socket configuration
+ #
+ UNIX {
+ Path /tmp/sync.sock
+ Backlog 20
+ }
+
+ #
+ # Netlink socket buffer size
+ #
+ SocketBufferSize 262142
+
+ #
+ # Increase the socket buffer up to maximum if required
+ #
+ SocketBufferSizeMaxGrown 655355
+}
+
+#
+# Ignore traffic for a certain set of IP's: Usually
+# all the IP assigned to the firewall since local
+# traffic must be ignored, just forwarded connections
+# are worth to replicate
+#
+IgnoreTrafficFor {
+ IPv4_address 127.0.0.1 # loopback
+ IPv4_address 192.168.0.2
+ IPv4_address 192.168.1.2
+ IPv4_address 192.168.100.200 # dedicated link ip
+ IPv4_address 192.168.0.200 # virtual IP 1
+ IPv4_address 192.168.1.200 # virtual IP 2
+}
+
+#
+# Do not replicate certain protocol traffic
+#
+IgnoreProtocol {
+ UDP
+ ICMP
+ IGMP
+ VRRP
+ # numeric numbers also valid
+}
+
+#
+# Strip NAT traffic
+#
+StripNAT
diff --git a/examples/sync/nack/node2/keepalived.conf b/examples/sync/nack/node2/keepalived.conf
new file mode 100644
index 0000000..41aa35b
--- /dev/null
+++ b/examples/sync/nack/node2/keepalived.conf
@@ -0,0 +1,38 @@
+vrrp_sync_group G1 { # must be before vrrp_instance declaration
+ group {
+ VI_1
+ VI_2
+ }
+ notify_master /etc/conntrackd/script_master.sh
+ notify_backup /etc/conntrackd/script_backup.sh
+}
+
+vrrp_instance VI_1 {
+ interface eth1
+ state SLAVE
+ virtual_router_id 61
+ priority 80
+ advert_int 3
+ authentication {
+ auth_type PASS
+ auth_pass papas_con_tomate
+ }
+ virtual_ipaddress {
+ 192.168.0.100 # default CIDR mask is /32
+ }
+}
+
+vrrp_instance VI_2 {
+ interface eth0
+ state SLAVE
+ virtual_router_id 62
+ priority 80
+ advert_int 3
+ authentication {
+ auth_type PASS
+ auth_pass papas_con_tomate
+ }
+ virtual_ipaddress {
+ 192.168.1.100
+ }
+}
diff --git a/examples/sync/nack/script_backup.sh b/examples/sync/nack/script_backup.sh
new file mode 100755
index 0000000..813e375
--- /dev/null
+++ b/examples/sync/nack/script_backup.sh
@@ -0,0 +1,3 @@
+#!/bin/sh
+
+/usr/sbin/conntrackd -n # request a resync from other nodes via multicast
diff --git a/examples/sync/nack/script_master.sh b/examples/sync/nack/script_master.sh
new file mode 100755
index 0000000..ff1dbc0
--- /dev/null
+++ b/examples/sync/nack/script_master.sh
@@ -0,0 +1,5 @@
+#!/bin/sh
+
+/usr/sbin/conntrackd -c # commit the cache
+/usr/sbin/conntrackd -f # flush the caches
+/usr/sbin/conntrackd -R # resync with kernel conntrack table
diff --git a/examples/sync/persistent/Makefile.am b/examples/sync/persistent/Makefile.am
new file mode 100644
index 0000000..6fd99b1
--- /dev/null
+++ b/examples/sync/persistent/Makefile.am
@@ -0,0 +1,2 @@
+EXTRA_DIST = script_backup.sh script_master.sh
+SUBDIRS = node1 node2
diff --git a/examples/sync/persistent/README b/examples/sync/persistent/README
new file mode 100644
index 0000000..36b5989
--- /dev/null
+++ b/examples/sync/persistent/README
@@ -0,0 +1 @@
+This directory contains the files for the PERSISTENT based protocol
diff --git a/examples/sync/persistent/node1/Makefile.am b/examples/sync/persistent/node1/Makefile.am
new file mode 100644
index 0000000..edc0ed7
--- /dev/null
+++ b/examples/sync/persistent/node1/Makefile.am
@@ -0,0 +1 @@
+EXTRA_DIST = conntrackd.conf keepalived.conf
diff --git a/examples/sync/persistent/node1/conntrackd.conf b/examples/sync/persistent/node1/conntrackd.conf
new file mode 100644
index 0000000..90afeb7
--- /dev/null
+++ b/examples/sync/persistent/node1/conntrackd.conf
@@ -0,0 +1,130 @@
+#
+# Synchronizer settings
+#
+Sync {
+ Mode PERSISTENT {
+ #
+ # If a conntrack entry is not modified in <= 15 seconds, then
+ # a message is broadcasted. This mechanism is used to
+ # resynchronize nodes that just joined the multicast group
+ #
+ RefreshTime 15
+
+ #
+ # If we don't receive a notification about the state of
+ # an entry in the external cache after N seconds, then
+ # remove it.
+ #
+ CacheTimeout 180
+
+ #
+ # Entries committed to the connection tracking table
+ # starts with a limited timeout of N seconds until the
+ # takeover process is completed.
+ #
+ CommitTimeout 180
+ }
+
+ #
+ # Multicast IP and interface where messages are
+ # broadcasted (dedicated link). IMPORTANT: Make sure
+ # that iptables accepts traffic for destination
+ # 225.0.0.50, eg:
+ #
+ # iptables -I INPUT -d 225.0.0.50 -j ACCEPT
+ # iptables -I OUTPUT -d 225.0.0.50 -j ACCEPT
+ #
+ Multicast {
+ IPv4_address 225.0.0.50
+ IPv4_interface 192.168.100.100 # IP of dedicated link
+ Group 3780
+ Backlog 20
+ }
+
+ # Enable/Disable message checksumming
+ Checksum on
+
+ # Uncomment this if you want to replicate just certain TCP states.
+ # This option introduces a tradeoff in the replication: it reduces
+ # CPU consumption and lost messages rate at the cost of having
+ # backup replicas that don't contain the current state that the active
+ # replica holds. TCP states are: SYN_SENT, SYN_RECV, ESTABLISHED,
+ # FIN_WAIT, CLOSE_WAIT, LAST_ACK, TIME_WAIT, CLOSE, LISTEN.
+ #
+ # Replicate ESTABLISHED TIME_WAIT for TCP
+}
+
+#
+# General settings
+#
+General {
+ #
+ # Number of buckets in the caches: hash table
+ #
+ HashSize 8192
+
+ #
+ # Maximum number of conntracks:
+ # it must be >= $ cat /proc/sys/net/ipv4/netfilter/ip_conntrack_max
+ #
+ HashLimit 65535
+
+ #
+ # Logfile
+ #
+ LogFile /var/log/conntrackd.log
+
+ #
+ # Lockfile
+ #
+ LockFile /var/lock/conntrack.lock
+
+ #
+ # Unix socket configuration
+ #
+ UNIX {
+ Path /tmp/sync.sock
+ Backlog 20
+ }
+
+ #
+ # Netlink socket buffer size
+ #
+ SocketBufferSize 262142
+
+ #
+ # Increase the socket buffer up to maximum if required
+ #
+ SocketBufferSizeMaxGrown 655355
+}
+
+#
+# Ignore traffic for a certain set of IP's: Usually
+# all the IP assigned to the firewall since local
+# traffic must be ignored, just forwarded connections
+# are worth to replicate
+#
+IgnoreTrafficFor {
+ IPv4_address 127.0.0.1 # loopback
+ IPv4_address 192.168.0.1
+ IPv4_address 192.168.1.1
+ IPv4_address 192.168.100.100 # dedicated link ip
+ IPv4_address 192.168.0.100 # virtual IP 1
+ IPv4_address 192.168.1.100 # virtual IP 2
+}
+
+#
+# Do not replicate certain protocol traffic
+#
+IgnoreProtocol {
+ UDP
+ ICMP
+ IGMP
+ VRRP
+ # numeric numbers also valid
+}
+
+#
+# Strip NAT traffic
+#
+StripNAT
diff --git a/examples/sync/persistent/node1/keepalived.conf b/examples/sync/persistent/node1/keepalived.conf
new file mode 100644
index 0000000..41aa35b
--- /dev/null
+++ b/examples/sync/persistent/node1/keepalived.conf
@@ -0,0 +1,38 @@
+vrrp_sync_group G1 { # must be before vrrp_instance declaration
+ group {
+ VI_1
+ VI_2
+ }
+ notify_master /etc/conntrackd/script_master.sh
+ notify_backup /etc/conntrackd/script_backup.sh
+}
+
+vrrp_instance VI_1 {
+ interface eth1
+ state SLAVE
+ virtual_router_id 61
+ priority 80
+ advert_int 3
+ authentication {
+ auth_type PASS
+ auth_pass papas_con_tomate
+ }
+ virtual_ipaddress {
+ 192.168.0.100 # default CIDR mask is /32
+ }
+}
+
+vrrp_instance VI_2 {
+ interface eth0
+ state SLAVE
+ virtual_router_id 62
+ priority 80
+ advert_int 3
+ authentication {
+ auth_type PASS
+ auth_pass papas_con_tomate
+ }
+ virtual_ipaddress {
+ 192.168.1.100
+ }
+}
diff --git a/examples/sync/persistent/node2/Makefile.am b/examples/sync/persistent/node2/Makefile.am
new file mode 100644
index 0000000..edc0ed7
--- /dev/null
+++ b/examples/sync/persistent/node2/Makefile.am
@@ -0,0 +1 @@
+EXTRA_DIST = conntrackd.conf keepalived.conf
diff --git a/examples/sync/persistent/node2/conntrackd.conf b/examples/sync/persistent/node2/conntrackd.conf
new file mode 100644
index 0000000..aee4a29
--- /dev/null
+++ b/examples/sync/persistent/node2/conntrackd.conf
@@ -0,0 +1,130 @@
+#
+# Synchronizer settings
+#
+Sync {
+ Mode PERSISTENT {
+ #
+ # If a conntrack entry is not modified in <= 15 seconds, then
+ # a message is broadcasted. This mechanism is used to
+ # resynchronize nodes that just joined the multicast group
+ #
+ RefreshTime 15
+
+ #
+ # If we don't receive a notification about the state of
+ # an entry in the external cache after N seconds, then
+ # remove it.
+ #
+ CacheTimeout 180
+
+ #
+ # Entries committed to the connection tracking table
+ # starts with a limited timeout of N seconds until the
+ # takeover process is completed.
+ #
+ CommitTimeout 180
+ }
+
+ #
+ # Multicast IP and interface where messages are
+ # broadcasted (dedicated link). IMPORTANT: Make sure
+ # that iptables accepts traffic for destination
+ # 225.0.0.50, eg:
+ #
+ # iptables -I INPUT -d 225.0.0.50 -j ACCEPT
+ # iptables -I OUTPUT -d 225.0.0.50 -j ACCEPT
+ #
+ Multicast {
+ IPv4_address 225.0.0.50
+ IPv4_interface 192.168.100.200 # IP of dedicated link
+ Group 3780
+ Backlog 20
+ }
+
+ # Enable/Disable message checksumming
+ Checksum on
+
+ # Uncomment this if you want to replicate just certain TCP states.
+ # This option introduces a tradeoff in the replication: it reduces
+ # CPU consumption and lost messages rate at the cost of having
+ # backup replicas that don't contain the current state that the active
+ # replica holds. TCP states are: SYN_SENT, SYN_RECV, ESTABLISHED,
+ # FIN_WAIT, CLOSE_WAIT, LAST_ACK, TIME_WAIT, CLOSE, LISTEN.
+ #
+ # Replicate ESTABLISHED TIME_WAIT for TCP
+}
+
+#
+# General settings
+#
+General {
+ #
+ # Number of buckets in the caches: hash table
+ #
+ HashSize 8192
+
+ #
+ # Maximum number of conntracks:
+ # it must be >= $ cat /proc/sys/net/ipv4/netfilter/ip_conntrack_max
+ #
+ HashLimit 65535
+
+ #
+ # Logfile
+ #
+ LogFile /var/log/conntrackd.log
+
+ #
+ # Lockfile
+ #
+ LockFile /var/lock/conntrack.lock
+
+ #
+ # Unix socket configuration
+ #
+ UNIX {
+ Path /tmp/sync.sock
+ Backlog 20
+ }
+
+ #
+ # Netlink socket buffer size
+ #
+ SocketBufferSize 262142
+
+ #
+ # Increase the socket buffer up to maximum if required
+ #
+ SocketBufferSizeMaxGrown 655355
+}
+
+#
+# Ignore traffic for a certain set of IP's: Usually
+# all the IP assigned to the firewall since local
+# traffic must be ignored, just forwarded connections
+# are worth to replicate
+#
+IgnoreTrafficFor {
+ IPv4_address 127.0.0.1 # loopback
+ IPv4_address 192.168.0.2
+ IPv4_address 192.168.1.2
+ IPv4_address 192.168.100.200 # dedicated link ip
+ IPv4_address 192.168.0.200 # virtual IP 1
+ IPv4_address 192.168.1.200 # virtual IP 2
+}
+
+#
+# Do not replicate certain protocol traffic
+#
+IgnoreProtocol {
+ UDP
+ ICMP
+ IGMP
+ VRRP
+ # numeric numbers also valid
+}
+
+#
+# Strip NAT traffic
+#
+StripNAT
diff --git a/examples/sync/persistent/node2/keepalived.conf b/examples/sync/persistent/node2/keepalived.conf
new file mode 100644
index 0000000..41aa35b
--- /dev/null
+++ b/examples/sync/persistent/node2/keepalived.conf
@@ -0,0 +1,38 @@
+vrrp_sync_group G1 { # must be before vrrp_instance declaration
+ group {
+ VI_1
+ VI_2
+ }
+ notify_master /etc/conntrackd/script_master.sh
+ notify_backup /etc/conntrackd/script_backup.sh
+}
+
+vrrp_instance VI_1 {
+ interface eth1
+ state SLAVE
+ virtual_router_id 61
+ priority 80
+ advert_int 3
+ authentication {
+ auth_type PASS
+ auth_pass papas_con_tomate
+ }
+ virtual_ipaddress {
+ 192.168.0.100 # default CIDR mask is /32
+ }
+}
+
+vrrp_instance VI_2 {
+ interface eth0
+ state SLAVE
+ virtual_router_id 62
+ priority 80
+ advert_int 3
+ authentication {
+ auth_type PASS
+ auth_pass papas_con_tomate
+ }
+ virtual_ipaddress {
+ 192.168.1.100
+ }
+}
diff --git a/examples/sync/persistent/script_backup.sh b/examples/sync/persistent/script_backup.sh
new file mode 100755
index 0000000..8ea2ad8
--- /dev/null
+++ b/examples/sync/persistent/script_backup.sh
@@ -0,0 +1,3 @@
+#!/bin/sh
+
+/usr/sbin/conntrackd -B
diff --git a/examples/sync/persistent/script_master.sh b/examples/sync/persistent/script_master.sh
new file mode 100755
index 0000000..70c26c9
--- /dev/null
+++ b/examples/sync/persistent/script_master.sh
@@ -0,0 +1,4 @@
+#!/bin/sh
+
+/usr/sbin/conntrackd -c
+/usr/sbin/conntrackd -R