Updating upstream with merged content from netfilter conntrack-tools version 1.0.1

7 files changed, 95 insertions, 752 deletions

diff --git a/doc/sync/alarm/conntrackd.conf b/doc/sync/alarm/conntrackd.conf
index 3424e39..deed291 100644
--- a/doc/sync/alarm/conntrackd.conf
+++ b/doc/sync/alarm/conntrackd.conf
@@ -180,6 +180,34 @@ Sync {
 		#
 		# Checksum on
 	# }
+
+	#
+	# Other unsorted options that are related to the synchronization.
+	#
+	# Options {
+		#
+		# TCP state-entries have window tracking disabled by default,
+		# you can enable it with this option. As said, default is off.
+		# This feature requires a Linux kernel >= 2.6.36.
+		#
+		# TCPWindowTracking Off
+
+		# Set this option on if you want to enable the synchronization
+		# of expectations. You have to specify the list of helpers that
+		# you want to enable. Default is off.
+		#
+		# ExpectationSync {
+		#       ftp
+		#       h323
+		#       sip
+		# }
+		#
+		# You can use this alternatively:
+		#
+		# ExpectationSync On
+		#
+		# If you want to synchronize expectations of all helpers.
+	# }
 }
 
 #
@@ -332,7 +360,9 @@ General {
 			TCP
 			SCTP
 			DCCP
+			# UDP
 			# ICMP # This requires a Linux kernel >= 2.6.31
+			# IPv6-ICMP # This requires a Linux kernel >= 2.6.31
 		}
 
 		#
diff --git a/doc/sync/alarm/conntrackd.conf.orig b/doc/sync/alarm/conntrackd.conf.orig
deleted file mode 100644
index ca6e661..0000000
--- a/doc/sync/alarm/conntrackd.conf.orig
+++ /dev/null
@@ -1,348 +0,0 @@
-#
-# Synchronizer settings
-#
-Sync {
-	Mode ALARM {
-		#
-		# 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
-
-		#
-		# This parameter allows you to set an initial fixed timeout
-		# for the committed entries when this node goes from backup
-		# to primary. This mechanism provides a way to purge entries
-		# that were not recovered appropriately after the specified
-		# fixed timeout. If you set a low value, TCP entries in
-		# Established states with no traffic may hang. For example,
-		# an SSH connection without KeepAlive enabled. If not set,
-		# the daemon uses an approximate timeout value calculation
-		# mechanism. By default, this option is not set.
-		#
-		# CommitTimeout 180
-
-		#
-		# If the firewall replica goes from primary to backup,
-		# the conntrackd -t command is invoked in the script. 
-		# This command schedules a flush of the table in N seconds.
-		# This is useful to purge the connection tracking table of
-		# zombie entries and avoid clashes with old entries if you
-		# trigger several consecutive hand-overs. Default is 60 seconds
-		#
-		# PurgeTimeout 60
-	}
-
-	#
-	# 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 {
-		# 
-		# Multicast address: The address that you use as destination
-		# in the synchronization messages. You do not have to add
-		# this IP to any of your existing interfaces. If any doubt,
-		# do not modify this value.
-		#
-		IPv4_address 225.0.0.50
-
-		#
-		# The multicast group that identifies the cluster. If any
-		# doubt, do not modify this value.
-		#
-		Group 3780
-
-		#
-		# IP address of the interface that you are going to use to
-		# send the synchronization messages. Remember that you must
-		# use a dedicated link for the synchronization messages.
-		#
-		IPv4_interface 192.168.100.100
-
-		#
-		# The name of the interface that you are going to use to
-		# send the synchronization messages.
-		#
-		Interface eth2
-
-		# The multicast sender uses a buffer to enqueue the packets
-		# that are going to be transmitted. The default size of this
-		# socket buffer is available at /proc/sys/net/core/wmem_default.
-		# This value determines the chances to have an overrun in the
-		# sender queue. The overrun results packet loss, thus, losing
-		# state information that would have to be retransmitted. If you
-		# notice some packet loss, you may want to increase the size
-		# of the sender buffer. The default size is usually around
-		# ~100 KBytes which is fairly small for busy firewalls.
-		#
-		SndSocketBuffer 1249280
-
-		# The multicast receiver uses a buffer to enqueue the packets
-		# that the socket is pending to handle. The default size of this
-		# socket buffer is available at /proc/sys/net/core/rmem_default.
-		# This value determines the chances to have an overrun in the
-		# receiver queue. The overrun results packet loss, thus, losing
-		# state information that would have to be retransmitted. If you
-		# notice some packet loss, you may want to increase the size of
-		# the receiver buffer. The default size is usually around
-		# ~100 KBytes which is fairly small for busy firewalls.
-		#
-		RcvSocketBuffer 1249280
-
-		# 
-		# Enable/Disable message checksumming. This is a good
-		# property to achieve fault-tolerance. In case of doubt, do
-		# not modify this value.
-		#
-		Checksum on
-	}
-	#
-	# You can specify more than one dedicated link. Thus, if one dedicated
-	# link fails, conntrackd can fail-over to another. Note that adding
-	# more than one dedicated link does not mean that state-updates will
-	# be sent to all of them. There is only one active dedicated link at
-	# a given moment. The `Default' keyword indicates that this interface
-	# will be selected as the initial dedicated link. You can have 
-	# up to 4 redundant dedicated links. Note: Use different multicast 
-	# groups for every redundant link.
-	#
-	# Multicast Default {
-	#	IPv4_address 225.0.0.51
-	#	Group 3781
-	#	IPv4_interface 192.168.100.101
-	#	Interface eth3
-	#	# SndSocketBuffer 1249280
-	#	# RcvSocketBuffer 1249280
-	#	Checksum on
-	# }
-
-	#
-	# You can use Unicast UDP instead of Multicast to propagate events.
-	# Note that you cannot use unicast UDP and Multicast at the same
-	# time, you can only select one.
-	# 
-	# UDP {
-		# 
-		# UDP address that this firewall uses to listen to events.
-		#
-		# IPv4_address 192.168.2.100
-		#
-		# or you may want to use an IPv6 address:
-		#
-		# IPv6_address fe80::215:58ff:fe28:5a27
-
-		#
-		# Destination UDP address that receives events, ie. the other
-		# firewall's dedicated link address.
-		#
-		# IPv4_Destination_Address 192.168.2.101
-		#
-		# or you may want to use an IPv6 address:
-		#
-		# IPv6_Destination_Address fe80::2d0:59ff:fe2a:775c
-
-		#
-		# UDP port used
-		#
-		# Port 3780
-
-		#
-		# The name of the interface that you are going to use to
-		# send the synchronization messages.
-		#
-		# Interface eth2
-
-		# 
-		# The sender socket buffer size
-		#
-		# SndSocketBuffer 1249280
-
-		#
-		# The receiver socket buffer size
-		#
-		# RcvSocketBuffer 1249280
-
-		# 
-		# Enable/Disable message checksumming. 
-		#
-		# Checksum on
-	# }
-}
-
-#
-# General settings
-#
-General {
-	#
-	# Set the nice value of the daemon, this value goes from -20
-	# (most favorable scheduling) to 19 (least favorable). Using a
-	# very low value reduces the chances to lose state-change events.
-	# Default is 0 but this example file sets it to most favourable
-	# scheduling as this is generally a good idea. See man nice(1) for
-	# more information.
-	#
-	Nice -20
-
-	#
-	# Number of buckets in the cache hashtable. The bigger it is,
-	# the closer it gets to O(1) at the cost of consuming more memory.
-	# Read some documents about tuning hashtables for further reference.
-	#
-	HashSize 32768
-
-	#
-	# Maximum number of conntracks, it should be double of: 
-	# $ cat /proc/sys/net/netfilter/nf_conntrack_max
-	# since the daemon may keep some dead entries cached for possible
-	# retransmission during state synchronization.
-	#
-	HashLimit 131072
-
-	#
-	# Logfile: on (/var/log/conntrackd.log), off, or a filename
-	# Default: off
-	#
-	LogFile on
-
-	#
-	# Syslog: on, off or a facility name (daemon (default) or local0..7)
-	# Default: off
-	#
-	#Syslog on
-
-	#
-	# Lockfile
-	# 
-	LockFile /var/lock/conntrack.lock
-
-	#
-	# Unix socket configuration
-	#
-	UNIX {
-		Path /var/run/conntrackd.ctl
-		Backlog 20
-	}
-
-	#
-	# Netlink event socket buffer size. If you do not specify this clause,
-	# the default buffer size value in /proc/net/core/rmem_default is
-	# used. This default value is usually around 100 Kbytes which is
-	# fairly small for busy firewalls. This leads to event message dropping
-	# and high CPU consumption. This example configuration file sets the
-	# size to 2 MBytes to avoid this sort of problems.
-	#
-	NetlinkBufferSize 2097152
-
-	#
-	# The daemon doubles the size of the netlink event socket buffer size
-	# if it detects netlink event message dropping. This clause sets the
-	# maximum buffer size growth that can be reached. This example file
-	# sets the size to 8 MBytes.
-	#
-	NetlinkBufferSizeMaxGrowth 8388608
-
-	#
-	# If the daemon detects that Netlink is dropping state-change events,
-	# it automatically schedules a resynchronization against the Kernel
-	# after 30 seconds (default value). Resynchronizations are expensive
-	# in terms of CPU consumption since the daemon has to get the full
-	# kernel state-table and purge state-entries that do not exist anymore.
-	# Be careful of setting a very small value here. You have the following
-	# choices: On (enabled, use default 30 seconds value), Off (disabled)
-	# or Value (in seconds, to set a specific amount of time). If not
-	# specified, the daemon assumes that this option is enabled.
-	#
-	# NetlinkOverrunResync On
-
-	# 
-	# By default, the daemon receives state updates following an
-	# event-driven model. You can modify this behaviour by switching to
-	# polling mode with the PollSecs clause. This clause tells conntrackd
-	# to dump the states in the kernel every N seconds. With regards to
-	# synchronization mode, the polling mode can only guarantee that
-	# long-lifetime states are recovered. The main advantage of this method
-	# is the reduction in the state replication at the cost of reducing the
-	# chances of recovering connections.
-	#
-	# PollSecs 15
-
-	#
-	# The daemon prioritizes the handling of state-change events coming
-	# from the core. With this clause, you can set the maximum number of
-	# state-change events (those coming from kernel-space) that the daemon
-	# will handle after which it will handle other events coming from the
-	# network or userspace. A low value improves interactivity (in terms of
-	# real-time behaviour) at the cost of extra CPU consumption.
-	# Default (if not set) is 100.
-	#
-	# EventIterationLimit 100
-
-	#
-	# Event filtering: This clause allows you to filter certain traffic,
-	# There are currently three filter-sets: Protocol, Address and
-	# State. The filter is attached to an action that can be: Accept or
-	# Ignore. Thus, you can define the event filtering policy of the
-	# filter-sets in positive or negative logic depending on your needs.
-	# You can select if conntrackd filters the event messages from 
-	# user-space or kernel-space. The kernel-space event filtering
-	# saves some CPU cycles by avoiding the copy of the event message
-	# from kernel-space to user-space. The kernel-space event filtering
-	# is prefered, however, you require a Linux kernel >= 2.6.29 to
-	# filter from kernel-space. If you want to select kernel-space 
-	# event filtering, use the keyword 'Kernelspace' instead of 
-	# 'Userspace'.
-	#
-	Filter From Userspace {
-		#
-		# Accept only certain protocols: You may want to replicate
-		# the state of flows depending on their layer 4 protocol.
-		#
-		Protocol Accept {
-			TCP
-		}
-
-		#
-		# Ignore traffic for a certain set of IP's: Usually all the
-		# IP assigned to the firewall since local traffic must be
-		# ignored, only forwarded connections are worth to replicate.
-		# Note that these values depends on the local IPs that are
-		# assigned to the firewall.
-		#
-		Address Ignore {
-			IPv4_address 127.0.0.1 # loopback
-			IPv4_address 192.168.0.100 # virtual IP 1
-			IPv4_address 192.168.1.100 # virtual IP 2
-			IPv4_address 192.168.0.1
-			IPv4_address 192.168.1.1
-			IPv4_address 192.168.100.100 # dedicated link ip
-			#
-			# You can also specify networks in format IP/cidr.
-			# IPv4_address 192.168.0.0/24
-		}
-
-		#
-		# Uncomment this line below if you want to filter by flow state.
-		# This option introduces a trade-off in the replication: it
-		# reduces CPU consumption at the cost of having lazy backup 
-		# firewall replicas. The existing TCP states are: SYN_SENT,
-		# SYN_RECV, ESTABLISHED, FIN_WAIT, CLOSE_WAIT, LAST_ACK,
-		# TIME_WAIT, CLOSED, LISTEN.
-		#
-		# State Accept {
-		#	ESTABLISHED CLOSED TIME_WAIT CLOSE_WAIT for TCP
-		# }
-	}
-}
diff --git a/doc/sync/alarm/conntrackd.conf.rej b/doc/sync/alarm/conntrackd.conf.rej
deleted file mode 100644
index 108546f..0000000
--- a/doc/sync/alarm/conntrackd.conf.rej
+++ /dev/null
@@ -1,30 +0,0 @@
-*************** Sync {
-*** 23,36 ****
-  
-  		#
-  		# If the firewall replica goes from primary to backup,
-- 		# the conntrackd -t command is invoked in the script. 
-- 		# This command resets the timers of the conntracks that
-- 		# live in the kernel to this new value. This is useful
-- 		# to purge the connection tracking table of zombie entries
-- 		# and avoid clashes with old entries if you trigger 
-- 		# several consecutive hand-overs.
-  		#
-- 		PurgeTimeout 15
-  
-  		# Set the acknowledgement window size. If you decrease this
-  		# value, the number of acknowlegdments increases. More
---- 23,35 ----
-  
-  		#
-  		# If the firewall replica goes from primary to backup,
-+ 		# the conntrackd -t command is invoked in the script.
-+ 		# This command schedules a flush of the table in N seconds.
-+ 		# This is useful to purge the connection tracking table of
-+ 		# zombie entries and avoid clashes with old entries if you
-+ 		# trigger several consecutive hand-overs. Default is 60 seconds.
-  		#
-+ 		# PurgeTimeout 60
-  
-  		# Set the acknowledgement window size. If you decrease this
-  		# value, the number of acknowlegdments increases. More
diff --git a/doc/sync/ftfw/conntrackd.conf b/doc/sync/ftfw/conntrackd.conf
index df10aca..0304f0f 100644
--- a/doc/sync/ftfw/conntrackd.conf
+++ b/doc/sync/ftfw/conntrackd.conf
@@ -204,6 +204,33 @@ Sync {
 		# Checksum on
 	# }
 
+	# 
+	# Other unsorted options that are related to the synchronization.
+	# 
+	# Options {
+		#
+		# TCP state-entries have window tracking disabled by default,
+		# you can enable it with this option. As said, default is off.
+		# This feature requires a Linux kernel >= 2.6.36.
+		#
+		# TCPWindowTracking Off
+
+		# Set this option on if you want to enable the synchronization
+		# of expectations. You have to specify the list of helpers that
+		# you want to enable. Default is off.
+		#
+		# ExpectationSync {
+		#	ftp
+		#	h323
+		#	sip
+		# }
+		#
+		# You can use this alternatively:
+		#
+		# ExpectationSync On
+		#
+		# If you want to synchronize expectations of all helpers.
+	# }
 }
 
 #
@@ -357,7 +384,9 @@ General {
 			TCP
 			SCTP
 			DCCP
+			# UDP
 			# ICMP # This requires a Linux kernel >= 2.6.31
+			# IPv6-ICMP # This requires a Linux kernel >= 2.6.31
 		}
 
 		#
diff --git a/doc/sync/ftfw/conntrackd.conf.orig b/doc/sync/ftfw/conntrackd.conf.orig
deleted file mode 100644
index c1208f9..0000000
--- a/doc/sync/ftfw/conntrackd.conf.orig
+++ /dev/null
@@ -1,370 +0,0 @@
-#
-# Synchronizer settings
-#
-Sync {
-	Mode FTFW {
-		#
-		# Size of the resend queue (in objects). This is the maximum
-		# number of objects that can be stored waiting to be confirmed
-		# via acknoledgment. If you keep this value low, the daemon
-		# will have less chances to recover state-changes under message
-		# omission. On the other hand, if you keep this value high,
-		# the daemon will consume more memory to store dead objects.
-		# Default is 131072 objects.
-		#
-		# ResendQueueSize 131072
-
-		#
-		# This parameter allows you to set an initial fixed timeout
-		# for the committed entries when this node goes from backup
-		# to primary. This mechanism provides a way to purge entries
-		# that were not recovered appropriately after the specified
-		# fixed timeout. If you set a low value, TCP entries in
-		# Established states with no traffic may hang. For example,
-		# an SSH connection without KeepAlive enabled. If not set,
-		# the daemon uses an approximate timeout value calculation
-		# mechanism. By default, this option is not set.
-		#
-		# CommitTimeout 180
-
-		#
-		# If the firewall replica goes from primary to backup,
-		# the conntrackd -t command is invoked in the script. 
-		# This command schedules a flush of the table in N seconds.
-		# This is useful to purge the connection tracking table of
-		# zombie entries and avoid clashes with old entries if you
-		# trigger several consecutive hand-overs. Default is 60 seconds.
-		#
-		# PurgeTimeout 60
-
-		# Set the acknowledgement window size. If you decrease this
-		# value, the number of acknowlegdments increases. More
-		# acknowledgments means more overhead as conntrackd has to
-		# handle more control messages. On the other hand, if you
-		# increase this value, the resend queue gets more populated.
-		# This results in more overhead in the queue releasing.
-		# The following value is based on some practical experiments
-		# measuring the cycles spent by the acknowledgment handling
-		# with oprofile. If not set, default window size is 300.
-		#
-		# ACKWindowSize 300
-	}
-
-	#
-	# 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 {
-		# 
-		# Multicast address: The address that you use as destination
-		# in the synchronization messages. You do not have to add
-		# this IP to any of your existing interfaces. If any doubt,
-		# do not modify this value.
-		#
-		IPv4_address 225.0.0.50
-
-		#
-		# The multicast group that identifies the cluster. If any
-		# doubt, do not modify this value.
-		#
-		Group 3780
-
-		#
-		# IP address of the interface that you are going to use to
-		# send the synchronization messages. Remember that you must
-		# use a dedicated link for the synchronization messages.
-		#
-		IPv4_interface 192.168.100.100
-
-		#
-		# The name of the interface that you are going to use to
-		# send the synchronization messages.
-		#
-		Interface eth2
-
-		# The multicast sender uses a buffer to enqueue the packets
-		# that are going to be transmitted. The default size of this
-		# socket buffer is available at /proc/sys/net/core/wmem_default.
-		# This value determines the chances to have an overrun in the
-		# sender queue. The overrun results packet loss, thus, losing
-		# state information that would have to be retransmitted. If you
-		# notice some packet loss, you may want to increase the size
-		# of the sender buffer. The default size is usually around
-		# ~100 KBytes which is fairly small for busy firewalls.
-		#
-		SndSocketBuffer 1249280
-
-		# The multicast receiver uses a buffer to enqueue the packets
-		# that the socket is pending to handle. The default size of this
-		# socket buffer is available at /proc/sys/net/core/rmem_default.
-		# This value determines the chances to have an overrun in the
-		# receiver queue. The overrun results packet loss, thus, losing
-		# state information that would have to be retransmitted. If you
-		# notice some packet loss, you may want to increase the size of
-		# the receiver buffer. The default size is usually around
-		# ~100 KBytes which is fairly small for busy firewalls.
-		#
-		RcvSocketBuffer 1249280
-
-		# 
-		# Enable/Disable message checksumming. This is a good
-		# property to achieve fault-tolerance. In case of doubt, do
-		# not modify this value.
-		#
-		Checksum on
-	}
-	#
-	# You can specify more than one dedicated link. Thus, if one dedicated
-	# link fails, conntrackd can fail-over to another. Note that adding
-	# more than one dedicated link does not mean that state-updates will
-	# be sent to all of them. There is only one active dedicated link at
-	# a given moment. The `Default' keyword indicates that this interface
-	# will be selected as the initial dedicated link. You can have 
-	# up to 4 redundant dedicated links. Note: Use different multicast 
-	# groups for every redundant link.
-	#
-	# Multicast Default {
-	#	IPv4_address 225.0.0.51
-	#	Group 3781
-	#	IPv4_interface 192.168.100.101
-	#	Interface eth3
-	#	# SndSocketBuffer 1249280
-	#	# RcvSocketBuffer 1249280
-	#	Checksum on
-	# }
-
-	#
-	# You can use Unicast UDP instead of Multicast to propagate events.
-	# Note that you cannot use unicast UDP and Multicast at the same
-	# time, you can only select one.
-	# 
-	# UDP {
-		# 
-		# UDP address that this firewall uses to listen to events.
-		#
-		# IPv4_address 192.168.2.100
-		#
-		# or you may want to use an IPv6 address:
-		#
-		# IPv6_address fe80::215:58ff:fe28:5a27
-
-		#
-		# Destination UDP address that receives events, ie. the other
-		# firewall's dedicated link address.
-		#
-		# IPv4_Destination_Address 192.168.2.101
-		#
-		# or you may want to use an IPv6 address:
-		#
-		# IPv6_Destination_Address fe80::2d0:59ff:fe2a:775c
-
-		#
-		# UDP port used
-		#
-		# Port 3780
-
-		#
-		# The name of the interface that you are going to use to
-		# send the synchronization messages.
-		#
-		# Interface eth2
-
-		# 
-		# The sender socket buffer size
-		#
-		# SndSocketBuffer 1249280
-
-		#
-		# The receiver socket buffer size
-		#
-		# RcvSocketBuffer 1249280
-
-		# 
-		# Enable/Disable message checksumming. 
-		#
-		# Checksum on
-	# }
-}
-
-#
-# General settings
-#
-General {
-	#
-	# Set the nice value of the daemon, this value goes from -20
-	# (most favorable scheduling) to 19 (least favorable). Using a
-	# very low value reduces the chances to lose state-change events.
-	# Default is 0 but this example file sets it to most favourable
-	# scheduling as this is generally a good idea. See man nice(1) for
-	# more information.
-	#
-	Nice -20
-
-	#
-	# Select a different scheduler for the daemon, you can select between
-	# RR and FIFO and the process priority (minimum is 0, maximum is 99).
-	# See man sched_setscheduler(2) for more information. Using a RT
-	# scheduler reduces the chances to overrun the Netlink buffer.
-	#
-	# Scheduler {
-	#	Type FIFO
-	#	Priority 99
-	# }
-
-	#
-	# Number of buckets in the cache hashtable. The bigger it is,
-	# the closer it gets to O(1) at the cost of consuming more memory.
-	# Read some documents about tuning hashtables for further reference.
-	#
-	HashSize 32768
-
-	#
-	# Maximum number of conntracks, it should be double of: 
-	# $ cat /proc/sys/net/netfilter/nf_conntrack_max
-	# since the daemon may keep some dead entries cached for possible
-	# retransmission during state synchronization.
-	#
-	HashLimit 131072
-
-	#
-	# Logfile: on (/var/log/conntrackd.log), off, or a filename
-	# Default: off
-	#
-	LogFile on
-
-	#
-	# Syslog: on, off or a facility name (daemon (default) or local0..7)
-	# Default: off
-	#
-	#Syslog on
-
-	#
-	# Lockfile
-	# 
-	LockFile /var/lock/conntrack.lock
-
-	#
-	# Unix socket configuration
-	#
-	UNIX {
-		Path /var/run/conntrackd.ctl
-		Backlog 20
-	}
-
-	#
-	# Netlink event socket buffer size. If you do not specify this clause,
-	# the default buffer size value in /proc/net/core/rmem_default is
-	# used. This default value is usually around 100 Kbytes which is
-	# fairly small for busy firewalls. This leads to event message dropping
-	# and high CPU consumption. This example configuration file sets the
-	# size to 2 MBytes to avoid this sort of problems.
-	#
-	NetlinkBufferSize 2097152
-
-	#
-	# The daemon doubles the size of the netlink event socket buffer size
-	# if it detects netlink event message dropping. This clause sets the
-	# maximum buffer size growth that can be reached. This example file
-	# sets the size to 8 MBytes.
-	#
-	NetlinkBufferSizeMaxGrowth 8388608
-
-	#
-	# If the daemon detects that Netlink is dropping state-change events,
-	# it automatically schedules a resynchronization against the Kernel
-	# after 30 seconds (default value). Resynchronizations are expensive
-	# in terms of CPU consumption since the daemon has to get the full
-	# kernel state-table and purge state-entries that do not exist anymore.
-	# Be careful of setting a very small value here. You have the following
-	# choices: On (enabled, use default 30 seconds value), Off (disabled)
-	# or Value (in seconds, to set a specific amount of time). If not
-	# specified, the daemon assumes that this option is enabled.
-	#
-	# NetlinkOverrunResync On
-
-	# 
-	# By default, the daemon receives state updates following an
-	# event-driven model. You can modify this behaviour by switching to
-	# polling mode with the PollSecs clause. This clause tells conntrackd
-	# to dump the states in the kernel every N seconds. With regards to
-	# synchronization mode, the polling mode can only guarantee that
-	# long-lifetime states are recovered. The main advantage of this method
-	# is the reduction in the state replication at the cost of reducing the
-	# chances of recovering connections.
-	#
-	# PollSecs 15
-
-	#
-	# The daemon prioritizes the handling of state-change events coming
-	# from the core. With this clause, you can set the maximum number of
-	# state-change events (those coming from kernel-space) that the daemon
-	# will handle after which it will handle other events coming from the
-	# network or userspace. A low value improves interactivity (in terms of
-	# real-time behaviour) at the cost of extra CPU consumption.
-	# Default (if not set) is 100.
-	#
-	# EventIterationLimit 100
-
-	#
-	# Event filtering: This clause allows you to filter certain traffic,
-	# There are currently three filter-sets: Protocol, Address and
-	# State. The filter is attached to an action that can be: Accept or
-	# Ignore. Thus, you can define the event filtering policy of the
-	# filter-sets in positive or negative logic depending on your needs.
-	# You can select if conntrackd filters the event messages from 
-	# user-space or kernel-space. The kernel-space event filtering
-	# saves some CPU cycles by avoiding the copy of the event message
-	# from kernel-space to user-space. The kernel-space event filtering
-	# is prefered, however, you require a Linux kernel >= 2.6.29 to
-	# filter from kernel-space. If you want to select kernel-space 
-	# event filtering, use the keyword 'Kernelspace' instead of 
-	# 'Userspace'.
-	#
-	Filter From Userspace {
-		#
-		# Accept only certain protocols: You may want to replicate
-		# the state of flows depending on their layer 4 protocol.
-		#
-		Protocol Accept {
-			TCP
-			SCTP
-			DCCP
-		}
-
-		#
-		# Ignore traffic for a certain set of IP's: Usually all the
-		# IP assigned to the firewall since local traffic must be
-		# ignored, only forwarded connections are worth to replicate.
-		# Note that these values depends on the local IPs that are
-		# assigned to the firewall.
-		#
-		Address Ignore {
-			IPv4_address 127.0.0.1 # loopback
-			IPv4_address 192.168.0.100 # virtual IP 1
-			IPv4_address 192.168.1.100 # virtual IP 2
-			IPv4_address 192.168.0.1
-			IPv4_address 192.168.1.1
-			IPv4_address 192.168.100.100 # dedicated link ip
-			#
-			# You can also specify networks in format IP/cidr.
-			# IPv4_address 192.168.0.0/24
-		}
-
-		#
-		# Uncomment this line below if you want to filter by flow state.
-		# This option introduces a trade-off in the replication: it
-		# reduces CPU consumption at the cost of having lazy backup 
-		# firewall replicas. The existing TCP states are: SYN_SENT,
-		# SYN_RECV, ESTABLISHED, FIN_WAIT, CLOSE_WAIT, LAST_ACK,
-		# TIME_WAIT, CLOSED, LISTEN.
-		#
-		# State Accept {
-		#	ESTABLISHED CLOSED TIME_WAIT CLOSE_WAIT for TCP
-		# }
-	}
-}
diff --git a/doc/sync/notrack/conntrackd.conf b/doc/sync/notrack/conntrackd.conf
index f8bccc4..34e7b32 100644
--- a/doc/sync/notrack/conntrackd.conf
+++ b/doc/sync/notrack/conntrackd.conf
@@ -242,6 +242,34 @@ Sync {
 		#
 		# Checksum on
 	# }
+
+	#
+	# Other unsorted options that are related to the synchronization.
+	#
+	# Options {
+		#
+		# TCP state-entries have window tracking disabled by default,
+		# you can enable it with this option. As said, default is off.
+		# This feature requires a Linux kernel >= 2.6.36.
+		#
+		# TCPWindowTracking Off
+
+		# Set this option on if you want to enable the synchronization
+		# of expectations. You have to specify the list of helpers that
+		# you want to enable. Default is off.
+		#
+		# ExpectationSync {
+		#       ftp
+		#       h323
+		#       sip
+		# }
+		#
+		# You can use this alternatively:
+		#
+		# ExpectationSync On
+		#
+		# If you want to synchronize expectations of all helpers.
+	# }
 }
 
 #
@@ -394,7 +422,9 @@ General {
 			TCP
 			SCTP
 			DCCP
+			# UDP
 			# ICMP # This requires a Linux kernel >= 2.6.31
+			# IPv6-ICMP # This requires a Linux kernel >= 2.6.31
 		}
 
 		#
diff --git a/doc/sync/primary-backup.sh b/doc/sync/primary-backup.sh
index 34c1cfa..fb74adc 100755
--- a/doc/sync/primary-backup.sh
+++ b/doc/sync/primary-backup.sh
@@ -1,9 +1,11 @@
 #!/bin/sh
-# 
-# (C) 2008 by Pablo Neira Ayuso <pablo@netfilter.org>
 #
-# This software may be used and distributed according to the terms
-# of the GNU General Public License, incorporated herein by reference.
+# (C) 2006-2011 by Pablo Neira Ayuso <pablo@netfilter.org>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
 #
 # Description:
 #