diff --git a/data/sql/default.sql b/data/sql/default.sql
index 284befc6c..55f269e7b 100755
--- a/data/sql/default.sql
+++ b/data/sql/default.sql
@@ -47,7 +47,8 @@ CREATE TABLE IF NOT EXISTS `firewall` (
 INSERT INTO `firewall` (`id`, `port`, `ps`, `addtime`) VALUES
 (1, '80', '网站默认端口', '0000-00-00 00:00:00'),
 (2, '7200', 'WEB面板', '0000-00-00 00:00:00'),
-(3, '22', 'SSH远程管理服务', '0000-00-00 00:00:00');
+(3, '22', 'SSH远程管理服务', '0000-00-00 00:00:00')
+(3, '888', 'phpMyAdmin默认端口', '0000-00-00 00:00:00');
 
 
 
diff --git a/plugins/simdht/workers/simdht_worker.py b/plugins/simdht/workers/simdht_worker.py
index 984d9c367..46bd332a5 100755
--- a/plugins/simdht/workers/simdht_worker.py
+++ b/plugins/simdht/workers/simdht_worker.py
@@ -129,6 +129,28 @@ def get_neighbor(target, nid, end=10):
     return target[:end] + nid[end:]
 
 
+def writeFile(filename, str):
+    # 写文件内容
+    try:
+        fp = open(filename, 'w+')
+        fp.write(str)
+        fp.close()
+        return True
+    except:
+        return False
+
+
+def readFile(filename):
+    # 读文件内容
+    try:
+        fp = open(filename, 'r')
+        fBody = fp.read()
+        fp.close()
+        return fBody
+    except:
+        return False
+
+
 class KNode(object):
 
     def __init__(self, nid, ip, port):
@@ -480,13 +502,26 @@ class DBDataCheck(Master):
         Master.__init__(self)
         self.setDaemon(True)
 
+    def get_start_id(self):
+        file = '../start_pos.pl'
+        if os.path.exists(file):
+            c = readFile(file)
+            return int(c)
+        else:
+            return 0
+
+    def set_start_id(self, start_id):
+        file = '../start_pos.pl'
+        writeFile(file, str(start_id))
+        return True
+
     def check_db_data(self):
 
         max_data = self.query('select max(id) from search_hash')
         max_id = max_data[0][0]
 
-        min_data = self.query('select min(id) from search_hash')
-        min_id = min_data[0][0]
+        min_id = self.get_start_id()
+        self.set_start_id(max_id)
 
         print 'min_id', min_id, 'max_id', max_id, 'ok!'
 
diff --git a/scripts/install_centos.sh b/scripts/install_centos.sh
index f1191636c..9e23bde96 100755
--- a/scripts/install_centos.sh
+++ b/scripts/install_centos.sh
@@ -16,6 +16,37 @@ if [ ! -f /usr/bin/applydeltarpm ];then
 fi
 
 
+if [ -f "/etc/init.d/iptables" ];then
+
+	iptables -I INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT
+	iptables -I INPUT -p tcp -m state --state NEW -m tcp --dport 80 -j ACCEPT
+	iptables -I INPUT -p tcp -m state --state NEW -m tcp --dport 888 -j ACCEPT
+	iptables -I INPUT -p tcp -m state --state NEW -m tcp --dport 7200 -j ACCEPT
+	iptables -I INPUT -p tcp -m state --state NEW -m tcp --dport 30000:40000 -j ACCEPT
+	service iptables save
+
+	iptables_status=`service iptables status | grep 'not running'`
+	if [ "${iptables_status}" == '' ];then
+		service iptables restart
+	fi
+fi
+
+if [ "${isVersion}" == '' ];then
+	if [ ! -f "/etc/init.d/iptables" ];then
+		yum install firewalld -y
+		systemctl enable firewalld
+		systemctl start firewalld
+
+		firewall-cmd --permanent --zone=public --add-port=22/tcp
+		firewall-cmd --permanent --zone=public --add-port=80/tcp
+		firewall-cmd --permanent --zone=public --add-port=888/tcp
+		firewall-cmd --permanent --zone=public --add-port=7200/tcp
+		firewall-cmd --permanent --zone=public --add-port=30000-40000/tcp
+		firewall-cmd --reload
+	fi
+fi
+
+
 yum install -y wget curl unzip zip
 
 # if [ ! -d '/www/server/mdserver-web' ];then