diff --git a/data/Dockerfiles/netfilter/server.py b/data/Dockerfiles/netfilter/server.py
index 31b80a9a..38c1ba9c 100644
--- a/data/Dockerfiles/netfilter/server.py
+++ b/data/Dockerfiles/netfilter/server.py
@@ -2,6 +2,7 @@
 
 import re
 import os
+import sys
 import time
 import atexit
 import signal
@@ -39,6 +40,7 @@ BLACKLIST= []
 bans = {}
 
 quit_now = False
+exit_code = 0
 lock = Lock()
 
 def log(priority, message):
@@ -61,6 +63,7 @@ def logInfo(message):
 def refreshF2boptions():
   global f2boptions
   global quit_now
+  global exit_code
   if not r.get('F2B_OPTIONS'):
     f2boptions = {}
     f2boptions['ban_time'] = int
@@ -81,10 +84,12 @@ def refreshF2boptions():
     except ValueError:
       print('Error loading F2B options: F2B_OPTIONS is not json')
       quit_now = True
+      exit_code = 2
 
 def refreshF2bregex():
   global f2bregex
   global quit_now
+  global exit_code
   if not r.get('F2B_REGEX'):
     f2bregex = {}
     f2bregex[1] = 'warning: .*\[([0-9a-f\.:]+)\]: SASL .+ authentication failed'
@@ -103,6 +108,7 @@ def refreshF2bregex():
     except ValueError:
       print('Error loading F2B options: F2B_REGEX is not json')
       quit_now = True
+      exit_code = 2
 
 if r.exists('F2B_LOG'):
   r.rename('F2B_LOG', 'NETFILTER_LOG')
@@ -110,6 +116,7 @@ if r.exists('F2B_LOG'):
 def mailcowChainOrder():
   global lock
   global quit_now
+  global exit_code
   while not quit_now:
     time.sleep(10)
     with lock:
@@ -128,9 +135,11 @@ def mailcowChainOrder():
               if position > 2:
                 logCrit('Error in %s chain order: MAILCOW on position %d, restarting container' % (chain.name, position))
                 quit_now = True
+                exit_code = 2
           if not target_found:
             logCrit('Error in %s chain: MAILCOW target not found, restarting container' % (chain.name))
             quit_now = True
+            exit_code = 2
 
 def ban(address):
   global lock
@@ -559,3 +568,5 @@ if __name__ == '__main__':
 
   while not quit_now:
     time.sleep(0.5)
+
+  sys.exit(exit_code)