diff -uNr original/linux/include/linux/netfilter_ipv4/ipt_nth.h linux/include/linux/netfilter_ipv4/ipt_nth.h
--- original/linux/include/linux/netfilter_ipv4/ipt_nth.h	Wed Dec 31 16:00:00 1969
+++ linux/include/linux/netfilter_ipv4/ipt_nth.h	Thu Sep 27 10:56:27 2001
@@ -0,0 +1,19 @@
+#ifndef _IPT_NTH_H
+#define _IPT_NTH_H
+
+#include <linux/param.h>
+#include <linux/types.h>
+
+#ifndef IPT_NTH_NUM_COUNTERS
+#define IPT_NTH_NUM_COUNTERS 16
+#endif
+
+struct ipt_nth_info {
+	u_int8_t every;
+	u_int8_t not;
+	u_int8_t startat;
+	u_int8_t counter;
+	u_int8_t packet;
+};
+
+#endif /*_IPT_NTH_H*/
diff -uNr original/linux/net/ipv4/netfilter/ipt_nth.c linux/net/ipv4/netfilter/ipt_nth.c
--- original/linux/net/ipv4/netfilter/ipt_nth.c	Wed Dec 31 16:00:00 1969
+++ linux/net/ipv4/netfilter/ipt_nth.c	Thu Sep 27 10:56:41 2001
@@ -0,0 +1,170 @@
+/*
+  This is a module which is used for match support for every Nth packet
+  This file is distributed under the terms of the GNU General Public
+  License (GPL). Copies of the GPL can be obtained from:
+     ftp://prep.ai.mit.edu/pub/gnu/GPL
+
+  2001-07-18 Fabrice MARIE <fabrice@celestix.com> : initial implementation.
+  2001-09-20 Richard Wagner (rwagner@cloudnet.com)
+        * added support for multiple counters
+        * added support for matching on individual packets
+          in the counter cycle
+
+*/
+
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/ip.h>
+#include <net/tcp.h>
+#include <linux/spinlock.h>
+#include <linux/netfilter_ipv4/ip_tables.h>
+#include <linux/netfilter_ipv4/ipt_nth.h>
+
+/*
+ * State information.
+ */
+struct state {
+	spinlock_t lock;
+	u_int16_t number;
+};
+
+static struct state states[IPT_NTH_NUM_COUNTERS];
+
+static int
+ipt_nth_match(const struct sk_buff *pskb,
+	      const struct net_device *in,
+	      const struct net_device *out,
+	      const void *matchinfo,
+	      int offset,
+	      const void *hdr,
+	      u_int16_t datalen,
+	      int *hotdrop)
+{
+	/* Parameters from userspace */
+	const struct ipt_nth_info *info = matchinfo;
+        unsigned counter = info->counter;
+       	if((counter < 0) || (counter >= IPT_NTH_NUM_COUNTERS)) 
+      	{
+       		printk(KERN_WARNING "nth: invalid counter %u. counter between 0 and %u\n", counter, IPT_NTH_NUM_COUNTERS-1);
+               return 0;
+        };
+
+        spin_lock(&states[counter].lock);
+
+        /* Are we matching every nth packet?*/
+        if (info->packet == 0xFF)
+        {
+		/* We're matching every nth packet and only every nth packet*/
+		/* Do we match or invert match? */
+		if (info->not == 0)
+		{
+			if (states[counter].number == 0)
+			{
+				++states[counter].number;
+				goto match;
+			}
+			if (states[counter].number >= info->every)
+				states[counter].number = 0; /* reset the counter */
+			else
+				++states[counter].number;
+			goto dontmatch;
+		}
+		else
+		{
+			if (states[counter].number == 0)
+			{
+				++states[counter].number;
+				goto dontmatch;
+			}
+			if (states[counter].number >= info->every)
+				states[counter].number = 0;
+			else
+				++states[counter].number;
+			goto match;
+		}
+        }
+        else
+        {
+		/* We're using the --packet, so there must be a rule for every value */
+		if (states[counter].number == info->packet)
+		{
+			/* only increment the counter when a match happens */
+			if (states[counter].number >= info->every)
+				states[counter].number = 0; /* reset the counter */
+			else
+				++states[counter].number;
+			goto match;
+		}
+		else
+			goto dontmatch;
+	}
+
+ dontmatch:
+	/* don't match */
+	spin_unlock(&states[counter].lock);
+	return 0;
+
+ match:
+	spin_unlock(&states[counter].lock);
+	return 1;
+}
+
+static int
+ipt_nth_checkentry(const char *tablename,
+		   const struct ipt_ip *e,
+		   void *matchinfo,
+		   unsigned int matchsize,
+		   unsigned int hook_mask)
+{
+	/* Parameters from userspace */
+	const struct ipt_nth_info *info = matchinfo;
+        unsigned counter = info->counter;
+        if((counter < 0) || (counter >= IPT_NTH_NUM_COUNTERS)) 
+	{
+		printk(KERN_WARNING "nth: invalid counter %u. counter between 0 and %u\n", counter, IPT_NTH_NUM_COUNTERS-1);
+               	return 0;
+       	};
+
+	if (matchsize != IPT_ALIGN(sizeof(struct ipt_nth_info))) {
+		printk("nth: matchsize %u != %u\n", matchsize,
+		       IPT_ALIGN(sizeof(struct ipt_nth_info)));
+		return 0;
+	}
+
+	states[counter].number = info->startat;
+
+	return 1;
+}
+
+static struct ipt_match ipt_nth_reg = { 
+	{NULL, NULL},
+	"nth",
+	ipt_nth_match,
+	ipt_nth_checkentry,
+	NULL,
+	THIS_MODULE };
+
+static int __init init(void)
+{
+	unsigned counter;
+        memset(&states, 0, sizeof(states));
+	if (ipt_register_match(&ipt_nth_reg))
+		return -EINVAL;
+
+        for(counter = 0; counter < IPT_NTH_NUM_COUNTERS; counter++) 
+	{
+		spin_lock_init(&(states[counter].lock));
+        };
+
+	printk("ipt_nth match loaded\n");
+	return 0;
+}
+
+static void __exit fini(void)
+{
+	ipt_unregister_match(&ipt_nth_reg);
+	printk("ipt_nth match unloaded\n");
+}
+
+module_init(init);
+module_exit(fini);
