diff --git a/include/common/standard.h b/include/common/standard.h
index a8e1b99..d28ab79 100644
--- a/include/common/standard.h
+++ b/include/common/standard.h
@@ -275,9 +275,10 @@
  * The IPv6 '::' address is IN6ADDR_ANY, so in order to bind to a given port on
  * IPv6, use ":::port". NULL is returned if the host part cannot be resolved.
  * If <pfx> is non-null, it is used as a string prefix before any path-based
- * address (typically the path to a unix socket).
+ * address (typically the path to a unix socket). If use_dns is not true,
+ * the funtion cannot accept the DNS resolution.
  */
-struct sockaddr_storage *str2sa_range(const char *str, int *low, int *high, char **err, const char *pfx, char **fqdn);
+struct sockaddr_storage *str2sa_range(const char *str, int *low, int *high, char **err, const char *pfx, char **fqdn, int use_dns);
 
 /* converts <str> to a struct in_addr containing a network mask. It can be
  * passed in dotted form (255.255.255.0) or in CIDR form (24). It returns 1
diff --git a/src/cfgparse.c b/src/cfgparse.c
index 3b7b390..06a2e0d 100644
--- a/src/cfgparse.c
+++ b/src/cfgparse.c
@@ -240,7 +240,7 @@
 
 		ss2 = str2sa_range(str, &port, &end, err,
 		                   curproxy == global.stats_fe ? NULL : global.unix_bind.prefix,
-		                   NULL);
+		                   NULL, 1);
 		if (!ss2)
 			goto fail;
 
@@ -1598,7 +1598,7 @@
 			}
 		}
 
-		sk = str2sa_range(args[1], &port1, &port2, &errmsg, NULL, NULL);
+		sk = str2sa_range(args[1], &port1, &port2, &errmsg, NULL, NULL, 1);
 		if (!sk) {
 			Alert("parsing [%s:%d] : '%s': %s\n", file, linenum, args[0], errmsg);
 			err_code |= ERR_ALERT | ERR_FATAL;
@@ -2059,7 +2059,7 @@
 		newpeer->last_change = now.tv_sec;
 		newpeer->id = strdup(args[1]);
 
-		sk = str2sa_range(args[2], &port1, &port2, &errmsg, NULL, NULL);
+		sk = str2sa_range(args[2], &port1, &port2, &errmsg, NULL, NULL, 1);
 		if (!sk) {
 			Alert("parsing [%s:%d] : '%s %s' : %s\n", file, linenum, args[0], args[1], errmsg);
 			err_code |= ERR_ALERT | ERR_FATAL;
@@ -2259,7 +2259,7 @@
 		newnameserver->conf.line = linenum;
 		newnameserver->id = strdup(args[1]);
 
-		sk = str2sa_range(args[2], &port1, &port2, &errmsg, NULL, NULL);
+		sk = str2sa_range(args[2], &port1, &port2, &errmsg, NULL, NULL, 1);
 		if (!sk) {
 			Alert("parsing [%s:%d] : '%s %s' : %s\n", file, linenum, args[0], args[1], errmsg);
 			err_code |= ERR_ALERT | ERR_FATAL;
@@ -2443,7 +2443,7 @@
 
 		newmailer->id = strdup(args[1]);
 
-		sk = str2sa_range(args[2], &port1, &port2, &errmsg, NULL, NULL);
+		sk = str2sa_range(args[2], &port1, &port2, &errmsg, NULL, NULL, 1);
 		if (!sk) {
 			Alert("parsing [%s:%d] : '%s %s' : %s\n", file, linenum, args[0], args[1], errmsg);
 			err_code |= ERR_ALERT | ERR_FATAL;
@@ -5611,7 +5611,7 @@
 		else if (warnifnotcap(curproxy, PR_CAP_BE, file, linenum, args[0], NULL))
 			err_code |= ERR_WARN;
 
-		sk = str2sa_range(args[1], &port1, &port2, &errmsg, NULL, NULL);
+		sk = str2sa_range(args[1], &port1, &port2, &errmsg, NULL, NULL, 1);
 		if (!sk) {
 			Alert("parsing [%s:%d] : '%s' : %s\n", file, linenum, args[0], errmsg);
 			err_code |= ERR_ALERT | ERR_FATAL;
@@ -5883,7 +5883,7 @@
 				}
 			}
 
-			sk = str2sa_range(args[1], &port1, &port2, &errmsg, NULL, NULL);
+			sk = str2sa_range(args[1], &port1, &port2, &errmsg, NULL, NULL, 1);
 			if (!sk) {
 				Alert("parsing [%s:%d] : '%s': %s\n", file, linenum, args[0], errmsg);
 				err_code |= ERR_ALERT | ERR_FATAL;
@@ -5935,7 +5935,7 @@
 		curproxy->conn_src.iface_name = NULL;
 		curproxy->conn_src.iface_len = 0;
 
-		sk = str2sa_range(args[1], &port1, &port2, &errmsg, NULL, NULL);
+		sk = str2sa_range(args[1], &port1, &port2, &errmsg, NULL, NULL, 1);
 		if (!sk) {
 			Alert("parsing [%s:%d] : '%s %s' : %s\n",
 			      file, linenum, args[0], args[1], errmsg);
@@ -6020,7 +6020,7 @@
 				} else {
 					struct sockaddr_storage *sk;
 
-					sk = str2sa_range(args[cur_arg + 1], &port1, &port2, &errmsg, NULL, NULL);
+					sk = str2sa_range(args[cur_arg + 1], &port1, &port2, &errmsg, NULL, NULL, 1);
 					if (!sk) {
 						Alert("parsing [%s:%d] : '%s %s' : %s\n",
 						      file, linenum, args[cur_arg], args[cur_arg+1], errmsg);
diff --git a/src/server.c b/src/server.c
index a34b850..bc92c3c 100644
--- a/src/server.c
+++ b/src/server.c
@@ -907,7 +907,7 @@
 			 *  - IP:+N => port=+N, relative
 			 *  - IP:-N => port=-N, relative
 			 */
-			sk = str2sa_range(args[2], &port1, &port2, &errmsg, NULL, &fqdn);
+			sk = str2sa_range(args[2], &port1, &port2, &errmsg, NULL, &fqdn, 1);
 			if (!sk) {
 				Alert("parsing [%s:%d] : '%s %s' : %s\n", file, linenum, args[0], args[1], errmsg);
 				err_code |= ERR_ALERT | ERR_FATAL;
@@ -1174,7 +1174,7 @@
 				int port1, port2;
 				struct protocol *proto;
 
-				sk = str2sa_range(args[cur_arg + 1], &port1, &port2, &errmsg, NULL, NULL);
+				sk = str2sa_range(args[cur_arg + 1], &port1, &port2, &errmsg, NULL, NULL, 1);
 				if (!sk) {
 					Alert("parsing [%s:%d] : '%s' : %s\n",
 					      file, linenum, args[cur_arg], errmsg);
@@ -1383,7 +1383,7 @@
 				}
 
 				newsrv->conn_src.opts |= CO_SRC_BIND;
-				sk = str2sa_range(args[cur_arg + 1], &port_low, &port_high, &errmsg, NULL, NULL);
+				sk = str2sa_range(args[cur_arg + 1], &port_low, &port_high, &errmsg, NULL, NULL, 1);
 				if (!sk) {
 					Alert("parsing [%s:%d] : '%s %s' : %s\n",
 					      file, linenum, args[cur_arg], args[cur_arg+1], errmsg);
@@ -1483,7 +1483,7 @@
 							struct sockaddr_storage *sk;
 							int port1, port2;
 
-							sk = str2sa_range(args[cur_arg + 1], &port1, &port2, &errmsg, NULL, NULL);
+							sk = str2sa_range(args[cur_arg + 1], &port1, &port2, &errmsg, NULL, NULL, 1);
 							if (!sk) {
 								Alert("parsing [%s:%d] : '%s %s' : %s\n",
 								      file, linenum, args[cur_arg], args[cur_arg+1], errmsg);
diff --git a/src/standard.c b/src/standard.c
index 7964b88..a468700 100644
--- a/src/standard.c
+++ b/src/standard.c
@@ -760,10 +760,12 @@
  *     that the caller will have to free(),
  *   - NULL if there was an explicit address that doesn't require resolution.
  *
+ * Hostnames are only resolved if <resolve> is non-null.
+ *
  * When a file descriptor is passed, its value is put into the s_addr part of
  * the address when cast to sockaddr_in and the address family is AF_UNSPEC.
  */
-struct sockaddr_storage *str2sa_range(const char *str, int *low, int *high, char **err, const char *pfx, char **fqdn)
+struct sockaddr_storage *str2sa_range(const char *str, int *low, int *high, char **err, const char *pfx, char **fqdn, int resolve)
 {
 	static struct sockaddr_storage ss;
 	struct sockaddr_storage *ret = NULL;
@@ -862,7 +864,7 @@
 
 		if (str2ip2(str2, &ss, 0) == NULL) {
 			use_fqdn = 1;
-			if (str2ip(str2, &ss) == NULL) {
+			if (!resolve || str2ip2(str2, &ss, 1) == NULL) {
 				memprintf(err, "invalid address: '%s' in '%s'\n", str2, str);
 				goto out;
 			}