diff --git a/src/client.py b/src/client.py
--- a/src/client.py
+++ b/src/client.py
@@ -7,11 +7,12 @@ import config as conf
 from networkers import NetworkReader,NetworkWriter
 
 
+filename=sys.argv[1]
+
+
 def connect():
-	HOST = conf.hosts[0]    # The remote host
-	PORT = conf.port              # The same port as used by the server
 	s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
-	s.connect((HOST, PORT))
+	s.connect((conf.hosts[0], conf.port))
 	fr=s.makefile(mode='rb')
 	fw=s.makefile(mode='wb')
 
@@ -27,7 +28,7 @@ def connect():
 
 
 def negotiate(incoming,outcoming):
-	localTree=HashTree.fromFile(open("clientFile.txt",mode="rb"))
+	localTree=HashTree.fromFile(open(filename,mode="rb"))
 	blocksToTransfer=[]
 	nodeStack=collections.deque([0]) # root
 
@@ -56,7 +57,7 @@ def negotiate(incoming,outcoming):
 
 def sendData(outcoming,blocksToTransfer):
 	print(blocksToTransfer)
-	dataFile=open("clientFile.txt",mode="rb")
+	dataFile=open(filename,mode="rb")
 
 	for i in blocksToTransfer:
 		jsonData={"command":"send", "index":i, "dataType":"data"}
diff --git a/src/config.py b/src/config.py
--- a/src/config.py
+++ b/src/config.py
@@ -1,4 +1,4 @@
 version=0
 
-hosts=["10.0.0.33"]
+hosts=["127.0.0.1"]
 port=50009
diff --git a/src/server.py b/src/server.py
--- a/src/server.py
+++ b/src/server.py
@@ -1,19 +1,20 @@
 import socket
 from hashtree import HashTree
-import queue
 from networkers import NetworkReader,NetworkWriter
 import collections
 import sys
 
 # debug copy default file
 import shutil
-shutil.copyfile("serverFile_.txt","serverFile.txt")
+origFilename=sys.argv[1]
+filename=origFilename+"_"
+shutil.copyfile(origFilename,filename)
 
 
-localTree=HashTree.fromFile(open("serverFile.txt",mode="rb"))
+localTree=HashTree.fromFile(open(filename,mode="rb"))
 
-HOST = ''                 # Symbolic name meaning all available interfaces
-PORT = 50009              # Arbitrary non-privileged port
+HOST = ''								 # Symbolic name meaning all available interfaces
+PORT = 50009							# Arbitrary non-privileged port
 s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
 s.bind((HOST, PORT))
 s.listen(1)
@@ -34,36 +35,36 @@ outcoming=networkWriter.input
 
 
 while True:
-  jsonData,binData=incoming.get(timeout=2)
-  
-  if jsonData["command"]=="init":
-    assert jsonData["blockSize"]==localTree.BLOCK_SIZE
-    assert jsonData["blockCount"]==localTree.leafCount
-    
-  elif jsonData["command"]=="req": # !! index out of range
-    print("received request for node #{0}".format(jsonData["index"]))
-    nodeHash=localTree.store[jsonData["index"]]
-    
-    jsonResponse={"command":"send", "index":jsonData["index"], "dataType":"hash"}
-    binResponse=nodeHash
-    
-    outcoming.put((jsonResponse,binResponse),timeout=2)
-  
-  elif jsonData["command"]=="send" and jsonData["dataType"]=="data": # needlessly allow hashes and data in mixed order
-    print("received data block #{0}: {1}...{2}".format(jsonData["index"],binData[:5],binData[-5:]))
-    
-    dataFile=open("serverFile.txt",mode="rb+")
-    dataFile.seek(jsonData["index"]*localTree.BLOCK_SIZE)
-    dataFile.write(binData)
-    dataFile.close()
-    
-    # never update the hash tree
-    
-  elif jsonData["command"]=="end":
-    print("closing...")
-    break
-  
-  else: pass # !! error
+	jsonData,binData=incoming.get(timeout=2)
+	
+	if jsonData["command"]=="init":
+		assert jsonData["blockSize"]==localTree.BLOCK_SIZE
+		assert jsonData["blockCount"]==localTree.leafCount
+		
+	elif jsonData["command"]=="req": # !! index out of range
+		print("received request for node #{0}".format(jsonData["index"]))
+		nodeHash=localTree.store[jsonData["index"]]
+		
+		jsonResponse={"command":"send", "index":jsonData["index"], "dataType":"hash"}
+		binResponse=nodeHash
+		
+		outcoming.put((jsonResponse,binResponse),timeout=2)
+	
+	elif jsonData["command"]=="send" and jsonData["dataType"]=="data": # needlessly allow hashes and data in mixed order
+		print("received data block #{0}: {1}...{2}".format(jsonData["index"],binData[:5],binData[-5:]))
+		
+		dataFile=open(filename,mode="rb+")
+		dataFile.seek(jsonData["index"]*localTree.BLOCK_SIZE)
+		dataFile.write(binData)
+		dataFile.close()
+		
+		# never update the hash tree
+		
+	elif jsonData["command"]=="end":
+		print("closing...")
+		break
+	
+	else: pass # !! error
 
 # fr.close()
 # fw.close()