check response of the other machine

python/client.py

@@ -0,0 +1,21 @@
+#!/usr/bin/python
+
+import socket
+import hashlib
+import time
+
+ip = "10.0.0.50"
+port = 12345
+s = socket.socket( socket.AF_INET, socket.SOCK_STREAM ) 
+s.connect(( ip, port ))
+
+try: 
+  while True: 
+    s.send( hashlib.sha256( socket.gethostbyname( socket.gethostname() ) ).hexdigest() ) 
+    antwort = s.recv( 1024 ) 
+    if antwort != hashlib.sha256( ip ).hexdigest():
+      print "shutting down now..."
+    time.sleep(10)
+finally: 
+  s.close()
+

python/server.py

@@ -0,0 +1,24 @@
+#!/usr/bin/python
+
+import socket
+import hashlib
+
+ip = "10.0.0.50"
+port = 12345
+
+s = socket.socket( socket.AF_INET, socket.SOCK_STREAM ) 
+s.bind(( ip, port )) 
+s.listen( 1 )
+
+try:
+  while True: 
+    komm, addr = s.accept() 
+    while True: 
+      data = komm.recv( 1024 )
+      if not data: 
+        komm.close() 
+        break
+      antwort = ( hashlib.sha256( socket.gethostbyname( socket.gethostname() ) ).hexdigest() if hashlib.sha256( addr[0] ).hexdigest() == data else hashlib.sha256( "ERROR" ).hexdigest() )
+      komm.send( antwort ) 
+finally: 
+  s.close()