--- ./include/linux/route.h.arpac	Sun May 20 20:33:03 2001
+++ ./include/linux/route.h	Sun May 20 20:33:03 2001
@@ -59,6 +59,7 @@
 #define RTF_WINDOW	0x0080		/* per route window clamping	*/
 #define RTF_IRTT	0x0100		/* Initial round trip time	*/
 #define RTF_REJECT	0x0200		/* Reject route			*/
+#define RTF_NOARPREPLY	0x0400		/* Do not answer ARP for this route */
 
 /*
  *	<linux/ipv6_route.h> uses RTF values >= 64k
--- ./net/ipv4/arp.c.arpac	Sun May 20 20:33:00 2001
+++ ./net/ipv4/arp.c	Sun May 20 20:45:13 2001
@@ -779,7 +779,8 @@
 		if (addr_type == RTN_LOCAL) {
 			n = neigh_event_ns(&arp_tbl, sha, &sip, dev);
 			if (n) {
-				if (!arp_filter(skb, sip, tip, in_dev))
+				if (!(rt->rt_flags & RTF_NOARPREPLY) &&
+				    !arp_filter(sip, tip, in_dev))
 					arp_send(ARPOP_REPLY,ETH_P_ARP,sip,dev,tip,sha,dev->dev_addr,sha);
 
 				neigh_release(n);
@@ -792,6 +793,9 @@
 				n = neigh_event_ns(&arp_tbl, sha, &sip, dev);
 				if (n)
 					neigh_release(n);
+
+				if (rt->rt_flags & RTF_NOARPREPLY)
+					goto out;
 
 				if (skb->stamp.tv_sec == 0 ||
 				    skb->pkt_type == PACKET_HOST ||