diff --git a/ReadMe.md b/ReadMe.md
index d04cbc5..397885f 100755
--- a/ReadMe.md
+++ b/ReadMe.md
@@ -300,6 +300,7 @@ vi /opt/etc/smartdns/smartdns.conf
 |log-file|日志文件路径|/var/log/smartdns.log|路径|log-file /var/log/smartdns.log
 |log-size|日志大小|128K|数字+K,M,G|log-size 128K
 |log-num|日志归档个数|2|数字|log-num 2
+|conf-file|附加日志文件|无|文件路径|conf-file /etc/smartdns/smartdns.more.conf
 |server|上游UDP DNS|114.114.114.114|[ip][:port]，可重复| server 8.8.8.8:53
 |server-tcp|上游TCP DNS|无|[IP][:port]，可重复| server-tcp 8.8.8.8:53
 |address|指定域名IP地址|无|address /domain/ip| address /www.example.com/1.2.3.4
diff --git a/package/luci/files/luci/controller/smartdns.lua b/package/luci/files/luci/controller/smartdns.lua
index 281fdcc..c69b422 100644
--- a/package/luci/files/luci/controller/smartdns.lua
+++ b/package/luci/files/luci/controller/smartdns.lua
@@ -27,8 +27,8 @@ function act_status()
 	e.local_port = smartdns.get_config_option("smartdns", "smartdns", "port", nil);
 	if e.redirect == "1" then 
 		if e.local_port ~= nil and e.local_port ~= "53" then
-			e.ipv4_works = luci.sys.call("iptables -t nat -nL PREROUTING | grep REDIRECT | grep dpt:53 | grep %q >/dev/null 2>&1" % e.local_port) == 0
-			e.ipv6_works = luci.sys.call("ip6tables -t nat -nL PREROUTING | grep REDIRECT | grep dpt:53 | grep %q >/dev/null 2>&1" % e.local_port) == 0
+			e.ipv4_works = luci.sys.call("iptables -t nat -nL PREROUTING 2>/dev/null | grep REDIRECT | grep dpt:53 | grep %q >/dev/null 2>&1" % e.local_port) == 0
+			e.ipv6_works = luci.sys.call("ip6tables -t nat -nL PREROUTING 2>/dev/null| grep REDIRECT | grep dpt:53 | grep %q >/dev/null 2>&1" % e.local_port) == 0
 		else
 			e.redirect = 0
 		end
diff --git a/package/luci/files/luci/i18n/smartdns.zh-cn.po b/package/luci/files/luci/i18n/smartdns.zh-cn.po
index 4eaee73..c894668 100644
--- a/package/luci/files/luci/i18n/smartdns.zh-cn.po
+++ b/package/luci/files/luci/i18n/smartdns.zh-cn.po
@@ -13,6 +13,9 @@ msgstr "SmartDNS 服务器"
 msgid "SmartDNS is a local high-performance DNS server, supports finding fastest IP, supports ad filtering, and supports avoiding DNS poisoning."
 msgstr "SmartDNS是一个本地高性能DNS服务器，支持避免域名污染，支持返回最快IP，支持广告过滤。"
 
+msgid "Custom Settings"
+msgstr "自定义设置"
+
 msgid "Server Name"
 msgstr "服务器名称"
 
@@ -67,6 +70,9 @@ msgstr "域名TTL最大值"
 msgid "Maximum TTL for all domain result."
 msgstr "设置所有域名的TTL最大值"
 
+msgid "smartdns custom settings"
+msgstr "smartdns 自定义设置，具体配置参数参考指导"
+
 msgid "Upstream Servers"
 msgstr "上游服务器"
 
diff --git a/package/luci/files/luci/model/cbi/smartdns.lua b/package/luci/files/luci/model/cbi/smartdns.lua
index 5ddb9be..75db311 100644
--- a/package/luci/files/luci/model/cbi/smartdns.lua
+++ b/package/luci/files/luci/model/cbi/smartdns.lua
@@ -15,25 +15,28 @@ m:section(SimpleSection).template  = "smartdns/smartdns_status"
 s = m:section(TypedSection, "smartdns", translate("Settings"), translate("General Settings"))
 s.anonymous = true
 
+s:tab("settings", translate("General Settings"))
+s:tab("custom", translate("Custom Settings"))
+
 ---- Eanble
-o = s:option(Flag, "enabled", translate("Enable"), translate("Enable or disable smartdns server"))
+o = s:taboption("settings", Flag, "enabled", translate("Enable"), translate("Enable or disable smartdns server"))
 o.default     = o.disabled
 o.rempty      = false
 
 ---- server name
-o = s:option(Value, "server_name", translate("Server Name"), translate("Smartdns server name"))
+o = s:taboption("settings", Value, "server_name", translate("Server Name"), translate("Smartdns server name"))
 o.default     = "smartdns"
 o.datatype    = "hostname"
 o.rempty      = false
 
 ---- Port
-o = s:option(Value, "port", translate("Local Port"), translate("Smartdns local server port"))
+o = s:taboption("settings", Value, "port", translate("Local Port"), translate("Smartdns local server port"))
 o.placeholder = 5353
 o.default     = 5353
 o.datatype    = "port"
 o.rempty      = false
 
-o = s:option(Flag, "redirect", translate("Redirect"), translate("Redirect standard dns query from 53 to smartdns, as default DNS server"))
+o = s:taboption("settings", Flag, "redirect", translate("Redirect"), translate("Redirect standard dns query from 53 to smartdns, as default DNS server"))
 o.rmempty     = false
 o.default     = o.enabled
 o.cfgvalue    = function(...)
@@ -41,21 +44,40 @@ o.cfgvalue    = function(...)
 end
 
 ---- cache-size
-o = s:option(Value, "cache_size", translate("Cache Size"), translate("DNS domain result cache size"))
+o = s:taboption("settings", Value, "cache_size", translate("Cache Size"), translate("DNS domain result cache size"))
 o.rempty      = true
 
 ---- rr-ttl
-o = s:option(Value, "rr_ttl", translate("Domain TTL"), translate("TTL for all domain result."))
+o = s:taboption("settings", Value, "rr_ttl", translate("Domain TTL"), translate("TTL for all domain result."))
 o.rempty      = true
 
 ---- rr-ttl-min
-o = s:option(Value, "rr_ttl_min", translate("Domain TTL Min"), translate("Minimum TTL for all domain result."))
+o = s:taboption("settings", Value, "rr_ttl_min", translate("Domain TTL Min"), translate("Minimum TTL for all domain result."))
 o.rempty      = true
 
 ---- rr-ttl-max
-o = s:option(Value, "rr_ttl_max", translate("Domain TTL Max"), translate("Maximum TTL for all domain result."))
+o = s:taboption("settings", Value, "rr_ttl_max", translate("Domain TTL Max"), translate("Maximum TTL for all domain result."))
 o.rempty      = true
 
+
+----- custom settings
+custom = s:taboption("custom", Value, "Custom Settings",
+	translate(""), 
+	translate("smartdns custom settings"))
+
+custom.template = "cbi/tvalue"
+custom.rows = 20
+
+function custom.cfgvalue(self, section)
+	return nixio.fs.readfile("/etc/smartdns/custom.conf")
+end
+
+function custom.write(self, section, value)
+	value = value:gsub("\r\n?", "\n")
+	nixio.fs.writefile("/etc/smartdns/custom.conf", value)
+end
+
+
 -- Upstream servers
 s = m:section(TypedSection, "server", translate("Upstream Servers"), translate("Upstream Servers, support UDP, TCP protocol. " ..
 	"Please configure multiple DNS servers, including multiple foreign DNS servers."))
diff --git a/package/openwrt/control/conffiles b/package/openwrt/control/conffiles
index b8dc0cf..0fa2363 100644
--- a/package/openwrt/control/conffiles
+++ b/package/openwrt/control/conffiles
@@ -1 +1,3 @@
 /etc/config/smartdns
+/etc/smartdns/address.conf
+/etc/smartdns/custom.conf
diff --git a/package/openwrt/custom.conf b/package/openwrt/custom.conf
new file mode 100644
index 0000000..fd552bc
--- /dev/null
+++ b/package/openwrt/custom.conf
@@ -0,0 +1,11 @@
+# Add custom settings here.
+
+# set log level
+# log-level [level], level=error, warn, info, debug
+# log-level error
+
+# log-size k,m,g
+# log-size 128k
+
+# log-file /var/log/smartdns.log
+# log-num 2
\ No newline at end of file
diff --git a/package/openwrt/files/etc/init.d/smartdns b/package/openwrt/files/etc/init.d/smartdns
index 4eca30f..9f82bb7 100644
--- a/package/openwrt/files/etc/init.d/smartdns
+++ b/package/openwrt/files/etc/init.d/smartdns
@@ -8,6 +8,7 @@ SERVICE_DAEMONIZE=1
 BASECONFIGFILE="/etc/smartdns/smartdns.conf"
 SMARTDNS_CONF="/var/etc/smartdns.conf"
 ADDRESS_CONF="/etc/smartdns/address.conf"
+CUSTOM_CONF="/etc/smartdns/custom.conf"
 SMARTDNS_CONF_TMP="${SMARTDNS_CONF}.tmp"
 
 set_iptable()
@@ -141,8 +142,8 @@ start_service() {
 
 	config_foreach load_server "server"
 
-	echo "# address" >> $SMARTDNS_CONF_TMP
-	grep "^ *address " $ADDRESS_CONF >> $SMARTDNS_CONF_TMP
+	echo "conf-file $ADDRESS_CONF" >> $SMARTDNS_CONF_TMP
+	echo "conf-file $CUSTOM_CONF" >> $SMARTDNS_CONF_TMP
 
 	config_get_bool "enabled" "$section" "enabled" '0'
 	mv $SMARTDNS_CONF_TMP $SMARTDNS_CONF
diff --git a/package/openwrt/make.sh b/package/openwrt/make.sh
index 40a0353..485a69f 100644
--- a/package/openwrt/make.sh
+++ b/package/openwrt/make.sh
@@ -7,6 +7,7 @@ SMARTDNS_DIR=$CURR_DIR/../../
 SMARTDNS_BIN=$SMARTDNS_DIR/src/smartdns
 SMARTDNS_CONF=$SMARTDNS_DIR/etc/smartdns/smartdns.conf
 ADDRESS_CONF=$CURR_DIR/address.conf
+CUSTOM_CONF=$CURR_DIR/custom.conf
 
 showhelp()
 {
@@ -32,6 +33,7 @@ build()
 
     cp $SMARTDNS_CONF  $ROOT/root/etc/smartdns/
     cp $ADDRESS_CONF $ROOT/root/etc/smartdns/
+    cp $CUSTOM_CONF $ROOT/root/etc/smartdns/
     cp $CURR_DIR/files/etc $ROOT/root/ -af
     cp $SMARTDNS_BIN $ROOT/root/usr/sbin
 
diff --git a/src/conf.c b/src/conf.c
index e206d36..9cd900d 100644
--- a/src/conf.c
+++ b/src/conf.c
@@ -28,6 +28,8 @@ int dns_conf_rr_ttl;
 int dns_conf_rr_ttl_min;
 int dns_conf_rr_ttl_max;
 
+int load_conf_file(const char *file);
+
 int config_bind(char *value)
 {
 	/* server bind address */
@@ -116,7 +118,12 @@ int config_address(char *value)
 
 	memset(address, 0, sizeof(*address));
 	len = end - begin;
-	memcpy(domain, begin, len);
+	memcpy(domain + 1, begin, len);
+	
+	/* add dot for subdomain */
+	domain[0] = '.';
+	len++;
+
 	domain[len] = 0;
 	reverse_string(domain_key + 1, domain, len);
 
@@ -209,6 +216,8 @@ int config_log_level(char *value)
 		dns_conf_log_level = TLOG_WARN;
 	} else if (strncmp("error", value, MAX_LINE_LEN) == 0) {
 		dns_conf_log_level = TLOG_ERROR;
+	} else {
+		return -1;
 	}
 
 	return 0;
@@ -297,6 +306,18 @@ int config_rr_ttl_max(char *value)
 	return 0;
 }
 
+int config_addtional_file(char *value)
+{
+	char *file_path = value;
+
+	if (access(file_path, R_OK) != 0) {
+		tlog(TLOG_WARN, "conf file %s is not readable.", file_path);
+		return 0;
+	}
+
+	return load_conf_file(file_path);
+}
+
 
 struct config_item {
 	const char *item;
@@ -318,6 +339,7 @@ struct config_item config_item[] = {
 	{"rr-ttl", config_rr_ttl},
 	{"rr-ttl-min", config_rr_ttl_min},
 	{"rr-ttl-max", config_rr_ttl_max},
+	{"conf-file", config_addtional_file},
 };
 int config_item_num = sizeof(config_item) / sizeof(struct config_item);
 
@@ -333,7 +355,7 @@ void load_exit(void)
 	config_address_destroy();
 }
 
-int load_conf(const char *file)
+int load_conf_file(const char *file)
 {
 	FILE *fp = NULL;
 	char line[MAX_LINE_LEN];
@@ -343,8 +365,6 @@ int load_conf(const char *file)
 	int line_num = 0;
 	int i;
 
-	load_conf_init();
-
 	fp = fopen(file, "r");
 	if (fp == NULL) {
 		tlog(TLOG_ERROR, "config file %s not exist.", file);
@@ -386,9 +406,17 @@ int load_conf(const char *file)
 
 	return 0;
 errout:
-	printf("invalid config at line %d: %s", line_num, line);
+	printf("invalid config at file %s:%d, %s", file, line_num, line);
+	tlog(TLOG_ERROR, "invalid config at file %s:%d, %s", file, line_num, line);
 	if (fp) {
 		fclose(fp);
 	}
 	return -1;
 }
+
+int load_conf(const char *file)
+{
+	load_conf_init();
+
+	return load_conf_file(file);
+}
diff --git a/src/dns_client.c b/src/dns_client.c
index ece404b..9ccc9eb 100644
--- a/src/dns_client.c
+++ b/src/dns_client.c
@@ -870,7 +870,7 @@ static void *_dns_client_work(void *arg)
 	unsigned long now = {0};
 	unsigned int sleep = 100;
 	int sleep_time;
-	unsigned int expect_time = 0;
+	unsigned long expect_time = 0;
 
 	sleep_time = sleep;
 	now = get_tick_count() - sleep;
diff --git a/src/dns_server.c b/src/dns_server.c
index 90274ad..a1b0ac6 100644
--- a/src/dns_server.c
+++ b/src/dns_server.c
@@ -773,6 +773,9 @@ static struct dns_address *_dns_server_get_address_by_domain(char *domain, int q
 	reverse_string(domain_key + 1, domain, domain_len);
 	domain_key[0] = type;
 	domain_len++;
+	domain_key[domain_len] = '.';
+	domain_len++;
+	domain_key[domain_len] = 0;
 
 	if (likely(dns_conf_log_level > TLOG_INFO)) {
 		return art_substring(&dns_conf_address, (unsigned char *)domain_key, domain_len, NULL, NULL);
diff --git a/src/smartdns.c b/src/smartdns.c
index 6c2f39b..4f3ece5 100644
--- a/src/smartdns.c
+++ b/src/smartdns.c
@@ -182,11 +182,11 @@ int smartdns_init(void)
 	char logname[DNS_MAX_PATH];
 
 	if (dns_conf_log_file[0] != 0) {
-		strncpy(logdir, dns_conf_log_file, DNS_MAX_PATH);
-		strncpy(logname, dns_conf_log_file, DNS_MAX_PATH);
-
-		dirname(logdir);
-		basename(logname);
+		char dns_log_file[DNS_MAX_PATH];
+		strncpy(dns_log_file, dns_conf_log_file, DNS_MAX_PATH);
+		strncpy(logdir, dirname(dns_log_file), DNS_MAX_PATH);
+		strncpy(dns_log_file, dns_conf_log_file, DNS_MAX_PATH);
+		strncpy(logname, basename(dns_log_file), DNS_MAX_PATH);
 	} else {
 		strncpy(logdir, SMARTDNS_LOG_PATH, DNS_MAX_PATH);
 		strncpy(logname, SMARTDNS_LOG_FILE, DNS_MAX_PATH);