diff --git a/interface/ri_tk_cmd.py b/interface/ri_tk_cmd.py
index 23cdf35..c6eb82f 100644
--- a/interface/ri_tk_cmd.py
+++ b/interface/ri_tk_cmd.py
@@ -125,6 +125,13 @@ def network_init():
     display.var_dict['network_primary_dns'].  set(value=ri_data.Network.primary_dns)
     display.var_dict['network_secondary_dns'].set(value=ri_data.Network.secondary_dns)
 
+def check_address(n):
+	if (re.match("^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$",n) and \
+			len([i for i in n.split('.') if (0<= int(i) <=255)])==4):
+		return True
+	else:
+		return False
+
 def network_quit():
     ''' network quit '''
     ri_data.Network.hostname       = display.var_dict['network_host_name'].get()
@@ -139,13 +146,14 @@ def network_quit():
     if not ri_data.Network.hostname:
         ri_widget.MessageBox.dict['check_ip_hostname'].show()
         ri_widget.Sequence.previous()
-    elif ri_data.Network.configuration == "static" and \
-          (not re.match("^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$",ri_data.Network.ip) or \
-           not re.match("^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$",ri_data.Network.mask) or \
-           not re.match("^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$",ri_data.Network.gateway) or \
-           not re.match("^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$",ri_data.Network.primary_dns)):
+    elif (ri_data.Network.configuration == "static" and \
+			((not check_address(ri_data.Network.ip) )or \
+			 (not check_address(ri_data.Network.mask) )or \
+			 (not check_address(ri_data.Network.gateway) )or \
+			 (not check_address(ri_data.Network.primary_dns)) ) ):
         ri_widget.MessageBox.dict['check_ip_hostname'].show()
         ri_widget.Sequence.previous()
+		#IP		0.0.0.0--255.255.255.255
 
 def ncm_dynamic():
     ''' when radio button ncm dynamic is checked, several data entry will be set 'disable' '''