diff -urN -x ipt_BALANCE.c linux-2.4.5-ac8.old/net/ipv4/netfilter/ipt_SAME.c linux/net/ipv4/netfilter/ipt_SAME.c
--- linux-2.4.5-ac8.old/net/ipv4/netfilter/ipt_SAME.c	Thu Jan  1 01:00:00 1970
+++ linux/net/ipv4/netfilter/ipt_SAME.c	Sun Jul 29 18:43:37 2001
@@ -0,0 +1,197 @@
+/* Same.  Just like SNAT, only try to make the connections
+ * 	  between client A and server B always have the same source ip.
+ *
+ * (C) 2000 Rusty Russell.  GPL.
+ *
+ * 010320 Martin Josefsson <gandalf@wlug.westbo.se>
+ * 	* copied ipt_BALANCE.c to ipt_SAME.c and changed a few things.
+ * 010728 Martin Josefsson <gandalf@wlug.westbo.se>
+ * 	* added --nodst to not include destination-ip in new source
+ * 	  calculations.
+ *	* added some more sanity-checks.
+ * 010729 Martin Josefsson <gandalf@wlug.westbo.se>
+ * 	* fixed a buggy if-statement in same_check(), should have
+ * 	  used ntohl() but didn't.
+ * 	* added support for multiple ranges. IPT_SAME_MAX_RANGE is
+ * 	  defined in linux/include/linux/netfilter_ipv4/ipt_SAME.h
+ * 	  and is currently set to 10.
+ * 	* added support for 1-address range, nice to have now that
+ * 	  we have multiple ranges.
+ */
+#include <linux/types.h>
+#include <linux/ip.h>
+#include <linux/timer.h>
+#include <linux/module.h>
+#include <linux/netfilter.h>
+#include <linux/netdevice.h>
+#include <linux/if.h>
+#include <linux/inetdevice.h>
+#include <net/protocol.h>
+#include <net/checksum.h>
+#include <linux/netfilter_ipv4.h>
+#include <linux/netfilter_ipv4/ip_nat_rule.h>
+#include <linux/netfilter_ipv4/ipt_SAME.h>
+
+#if 0
+#define DEBUGP printk
+#else
+#define DEBUGP(format, args...)
+#endif
+
+static int
+same_check(const char *tablename,
+	      const struct ipt_entry *e,
+	      void *targinfo,
+	      unsigned int targinfosize,
+	      unsigned int hook_mask)
+{
+	unsigned int count, countess, rangeip, index = 0;
+	struct ipt_same_info *mr = targinfo;
+
+	mr->ipnum = 0;
+
+	if (strcmp(tablename, "nat") != 0) {
+		DEBUGP("same_check: bad table `%s'.\n", tablename);
+		return 0;
+	}
+	if (targinfosize != IPT_ALIGN(sizeof(*mr))) {
+		DEBUGP("same_check: size %u.\n", targinfosize);
+		return 0;
+	}
+	if (hook_mask & ~(1 << NF_IP_POST_ROUTING)) {
+		DEBUGP("same_check: bad hooks %x.\n", hook_mask);
+		return 0;
+	}
+	if (mr->rangesize < 1) {
+		DEBUGP("same_check: need at least one dest range.\n");
+		return 0;
+	}
+	if (mr->rangesize > IPT_SAME_MAX_RANGE) {
+		DEBUGP("same_check: too many ranges specified, maximum "
+				"is %u ranges\n",
+				IPT_SAME_MAX_RANGE);
+		return 0;
+	}
+	for (count = 0; count < mr->rangesize; count++) {
+		if (ntohl(mr->range[count].min_ip) >
+				ntohl(mr->range[count].max_ip)) {
+			DEBUGP("same_check: min_ip is larger than max_ip in "
+				"range `%u.%u.%u.%u-%u.%u.%u.%u'.\n",
+				NIPQUAD(mr->range[count].min_ip),
+				NIPQUAD(mr->range[count].max_ip));
+			return 0;
+		}
+		if (!(mr->range[count].flags & IP_NAT_RANGE_MAP_IPS)) {
+			DEBUGP("same_check: bad MAP_IPS.\n");
+			return 0;
+		}
+		rangeip = (ntohl(mr->range[count].max_ip) - 
+					ntohl(mr->range[count].min_ip) + 1);
+		mr->ipnum += rangeip;
+		
+		DEBUGP("same_check: range %u, ipnum = %u\n", count, rangeip);
+	}
+	DEBUGP("same_check: total ipaddresses = %u\n", mr->ipnum);
+	
+	mr->iparray = kmalloc((sizeof(u_int32_t) * mr->ipnum), GFP_KERNEL);
+	if (!mr->iparray) {
+		DEBUGP("same_check: Couldn't allocate %u bytes "
+			"for %u ipaddresses!\n", 
+			(sizeof(u_int32_t) * mr->ipnum), mr->ipnum);
+		return 0;
+	}
+	DEBUGP("same_check: Allocated %u bytes for %u ipaddresses.\n",
+			(sizeof(u_int32_t) * mr->ipnum), mr->ipnum);
+	
+	for (count = 0; count < mr->rangesize; count++) {
+		for (countess = ntohl(mr->range[count].min_ip);
+				countess <= ntohl(mr->range[count].max_ip);
+					countess++) {
+			mr->iparray[index] = countess;
+			DEBUGP("same_check: Added ipaddress `%u.%u.%u.%u' "
+				"in index %u.\n",
+				HIPQUAD(countess), index);
+			index++;
+		}
+	}
+	return 1;
+}
+
+static void 
+same_destroy(void *targinfo,
+		unsigned int targinfosize)
+{
+	struct ipt_same_info *mr = targinfo;
+
+	kfree(mr->iparray);
+	
+	DEBUGP("same_destroy: Deallocated %u bytes for %u ipaddresses.\n",
+			(sizeof(u_int32_t) * mr->ipnum), mr->ipnum);
+}
+
+static unsigned int
+same_target(struct sk_buff **pskb,
+		unsigned int hooknum,
+		const struct net_device *in,
+		const struct net_device *out,
+		const void *targinfo,
+		void *userinfo)
+{
+	struct ip_conntrack *ct;
+	enum ip_conntrack_info ctinfo;
+	u_int32_t tmpip, aindex, new_ip;
+	const struct ipt_same_info *mr = targinfo;
+	struct ip_nat_multi_range newrange;
+	const struct ip_conntrack_tuple *t;
+
+	IP_NF_ASSERT(hooknum == NF_IP_POST_ROUTING);
+	ct = ip_conntrack_get(*pskb, &ctinfo);
+
+	t = &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple;
+
+	/* Base new source on real src ip and optionally dst ip,
+	   giving some hope for consistency across reboots.
+	   Here we calculate the index in mr->iparray which
+	   holds the ipaddress we should use */
+	
+	tmpip = ntohl(t->src.ip);
+
+	if (!(mr->info & IPT_SAME_NODST))
+		tmpip += ntohl(t->dst.ip);
+	
+	aindex = tmpip % mr->ipnum;
+		
+	new_ip = htonl(mr->iparray[aindex]);
+
+	DEBUGP("ipt_SAME: src=%u.%u.%u.%u dst=%u.%u.%u.%u, "
+			"new src=%u.%u.%u.%u\n",
+			NIPQUAD(t->src.ip), NIPQUAD(t->dst.ip),
+			NIPQUAD(new_ip));
+
+	/* Transfer from original range. */
+	newrange = ((struct ip_nat_multi_range)
+		{ 1, { { mr->range[0].flags | IP_NAT_RANGE_MAP_IPS,
+			 new_ip, new_ip,
+			 mr->range[0].min, mr->range[0].max } } });
+
+	/* Hand modified range to generic setup. */
+	return ip_nat_setup_info(ct, &newrange, hooknum);
+}
+
+static struct ipt_target same_reg
+= { { NULL, NULL }, "SAME", same_target, same_check, same_destroy,
+    THIS_MODULE };
+
+static int __init init(void)
+{
+	return ipt_register_target(&same_reg);
+}
+
+static void __exit fini(void)
+{
+	ipt_unregister_target(&same_reg);
+}
+
+module_init(init);
+module_exit(fini);
+
diff -urN -x ipt_BALANCE.h linux-2.4.5-ac8.old/include/linux/netfilter_ipv4/ipt_SAME.h linux/include/linux/netfilter_ipv4/ipt_SAME.h
--- linux-2.4.5-ac8.old/include/linux/netfilter_ipv4/ipt_SAME.h	Thu Jan  1 01:00:00 1970
+++ linux/include/linux/netfilter_ipv4/ipt_SAME.h	Sun Jul 29 13:33:28 2001
@@ -0,0 +1,22 @@
+#ifndef _IPT_SAME_H
+#define _IPT_SAME_H
+
+#define IPT_SAME_MAX_RANGE	10
+
+#define IPT_SAME_NODST		0x01
+
+struct ipt_same_info
+{
+	unsigned char info;
+
+	unsigned int rangesize;
+
+	unsigned int ipnum;
+
+	u_int32_t *iparray;
+
+	/* hangs off end. */
+	struct ip_nat_range range[IPT_SAME_MAX_RANGE];
+};
+
+#endif /*_IPT_SAME_H*/
