diff -NurpP --minimal linux-3.0.1-vs2.3.1-pre9/include/linux/vs_inet.h linux-3.0.1-vs2.3.1-pre9.2/include/linux/vs_inet.h
--- linux-3.0.1-vs2.3.1-pre9/include/linux/vs_inet.h	2011-06-10 22:11:24.000000000 +0200
+++ linux-3.0.1-vs2.3.1-pre9.2/include/linux/vs_inet.h	2011-08-18 17:01:00.000000000 +0200
@@ -253,7 +253,9 @@ int v4_map_sock_addr(struct inet_sock *i
 		} else if (saddr == IPI_LOOPBACK) {
 			if (nx_info_flags(nxi, NXF_LBACK_REMAP, 0))
 				baddr = nxi->v4_lback.s_addr;
-		} else {	/* normal address bind */
+		} else if (!ipv4_is_multicast(saddr) ||
+			!nx_info_ncaps(nxi, NXC_MULTICAST)) {
+			/* normal address bind */
 			if (!v4_addr_in_nx_info(nxi, saddr, NXA_MASK_BIND))
 				return -EADDRNOTAVAIL;
 		}
diff -NurpP --minimal linux-3.0.1-vs2.3.1-pre9/include/linux/vserver/network.h linux-3.0.1-vs2.3.1-pre9.2/include/linux/vserver/network.h
--- linux-3.0.1-vs2.3.1-pre9/include/linux/vserver/network.h	2011-06-10 22:11:24.000000000 +0200
+++ linux-3.0.1-vs2.3.1-pre9.2/include/linux/vserver/network.h	2011-08-18 16:30:48.000000000 +0200
@@ -48,6 +48,8 @@ static inline uint64_t __nxf_init_set(vo
 
 #define NXC_RAW_ICMP		0x00000100
 
+#define NXC_MULTICAST		0x00001000
+
 
 /* address types */