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#
# This parameter directs the netfilter TCP connection tracking modules
# (nf_conntrack, and others) to either allow or disallow the tracking
# of TCP connections which are "previously established". This
# includes all cases where the three-way connection opening handshake
# was not seen by this machine. That includes the case the connection
# was opened before this machine booted. It also includes cases where
# the packets comprising the three-way handshake were routed via some
# other router.
#
# If this parameter is set to "enable", tracking such connections is
# allowed. If disabled, such tracking is disabled.
# default value - 1
type: txt
help: Policy to track previously established connections
val_help: enable; Allow tracking of previously established connections
val_help: disable; Do not allow tracking of previously established connections
default: "enable"
syntax:expression: $VAR(@) in "enable", "disable"; "must be either enable or disable"
update:
if [ ! -e /proc/sys/net/ipv4/netfilter/ip_conntrack_tcp_loose ]; then
sudo modprobe nf_conntrack_ipv4
fi
if [ "$VAR(@)" = "enable" ]; then
sudo sh -c "echo 1 > \
/proc/sys/net/ipv4/netfilter/ip_conntrack_tcp_loose"
elif [ "$VAR(@)" = "disable" ]; then
sudo sh -c "echo 0 > \
/proc/sys/net/ipv4/netfilter/ip_conntrack_tcp_loose"
else
echo "Invalid parameter: $VAR(@)"
exit 1
fi
delete:
if [ ! -e /proc/sys/net/ipv4/netfilter/ip_conntrack_tcp_loose ]; then
sudo modprobe nf_conntrack_ipv4
fi
sudo sh -c "echo 1 > \
/proc/sys/net/ipv4/netfilter/ip_conntrack_tcp_loose"
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