--- a/include/net/netns/conntrack.h
+++ b/include/net/netns/conntrack.h
@@ -80,6 +80,7 @@ struct netns_ct {
 	int			sysctl_acct;
 	int			sysctl_tstamp;
 	int			sysctl_checksum;
+	int			skip_filter;
 	unsigned int		sysctl_log_invalid; /* Log invalid packets */
 	int			sysctl_auto_assign_helper;
 	bool			auto_assign_helper_warned;
--- a/net/ipv4/netfilter/iptable_filter.c
+++ b/net/ipv4/netfilter/iptable_filter.c
@@ -15,6 +15,7 @@
 #include <linux/netfilter_ipv4/ip_tables.h>
 #include <linux/slab.h>
 #include <net/ip.h>
+#include <net/netfilter/nf_conntrack.h>
 
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Netfilter Core Team <coreteam@netfilter.org>");
@@ -37,6 +38,7 @@ iptable_filter_hook(unsigned int hook, s
 		    const struct net_device *in, const struct net_device *out,
 		    int (*okfn)(struct sk_buff *))
 {
+	enum ip_conntrack_info ctinfo;
 	const struct net *net;
 
 	if (hook == NF_INET_LOCAL_OUT &&
@@ -46,6 +48,11 @@ iptable_filter_hook(unsigned int hook, s
 		return NF_ACCEPT;
 
 	net = dev_net((in != NULL) ? in : out);
+	nf_ct_get(skb, &ctinfo);
+	if ((ctinfo == IP_CT_ESTABLISHED_REPLY || ctinfo == IP_CT_ESTABLISHED) &&
+	    net->ct.skip_filter)
+	    return NF_ACCEPT;
+
 	return ipt_do_table(skb, hook, in, out, net->ipv4.iptable_filter);
 }
 
--- a/net/ipv6/netfilter/ip6table_filter.c
+++ b/net/ipv6/netfilter/ip6table_filter.c
@@ -13,6 +13,7 @@
 #include <linux/moduleparam.h>
 #include <linux/netfilter_ipv6/ip6_tables.h>
 #include <linux/slab.h>
+#include <net/netfilter/nf_conntrack.h>
 
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Netfilter Core Team <coreteam@netfilter.org>");
@@ -37,6 +38,12 @@ ip6table_filter_hook(unsigned int hook, 
 		     int (*okfn)(struct sk_buff *))
 {
 	const struct net *net = dev_net((in != NULL) ? in : out);
+	enum ip_conntrack_info ctinfo;
+
+	nf_ct_get(skb, &ctinfo);
+	if ((ctinfo == IP_CT_ESTABLISHED_REPLY || ctinfo == IP_CT_ESTABLISHED) &&
+	    net->ct.skip_filter)
+	    return NF_ACCEPT;
 
 	return ip6t_do_table(skb, hook, in, out, net->ipv6.ip6table_filter);
 }
--- a/net/netfilter/nf_conntrack_standalone.c
+++ b/net/netfilter/nf_conntrack_standalone.c
@@ -477,6 +477,13 @@ static ctl_table nf_ct_sysctl_table[] = 
 		.extra2		= &log_invalid_proto_max,
 	},
 	{
+		.procname	= "nf_conntrack_skip_filter",
+		.data		= &init_net.ct.skip_filter,
+		.maxlen		= sizeof(int),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec,
+	},
+	{
 		.procname	= "nf_conntrack_expect_max",
 		.data		= &nf_ct_expect_max,
 		.maxlen		= sizeof(int),
@@ -512,6 +519,7 @@ static int nf_conntrack_standalone_init_
 	table[2].data = &net->ct.htable_size;
 	table[3].data = &net->ct.sysctl_checksum;
 	table[4].data = &net->ct.sysctl_log_invalid;
+	table[5].data = &net->ct.skip_filter;
 
 	/* Don't export sysctls to unprivileged users */
 	if (net->user_ns != &init_user_ns)