diff --git a/helper_scripts/run_json_proxy.py b/helper_scripts/run_json_proxy.py
index 53f4e38..380f0c5 100755
--- a/helper_scripts/run_json_proxy.py
+++ b/helper_scripts/run_json_proxy.py
@@ -45,6 +45,10 @@ def main(args):
             rlist, wlist, _ = select.select([s], [s], [])
             if s in rlist:
                 x = s.recv(1024)
+                if "KO: password required" in x:
+                    s.close()
+                    print("Password protection is enabled MockGeoFix settings. This is not supported.")
+                    sys.exit(2)
                 if x == '':
                     s.close()
                     print("Connection closed.")
diff --git a/helper_scripts/run_sim.py b/helper_scripts/run_sim.py
index 7b57a0d..e219500 100755
--- a/helper_scripts/run_sim.py
+++ b/helper_scripts/run_sim.py
@@ -130,6 +130,10 @@ def start_geofix(args):
             rlist, wlist, _ = select.select([s], [s], [])
             if s in rlist:
                 x = s.recv(1024)
+                if "KO: password required" in x:
+                    s.close()
+                    print("Password protection is enabled MockGeoFix settings. This is not supported.")
+                    sys.exit(2)
                 if x == '':
                     s.close()
                     print("Connection closed.")