diff --git a/copyparty/ftpd.py b/copyparty/ftpd.py
index b7246291..197ca59d 100644
--- a/copyparty/ftpd.py
+++ b/copyparty/ftpd.py
@@ -68,13 +68,13 @@ class FtpAuth(DummyAuthorizer):
         if ip.startswith("::ffff:"):
             ip = ip[7:]
 
-        ip = ipnorm(ip)
+        ipn = ipnorm(ip)
         bans = self.hub.bans
-        if ip in bans:
-            rt = bans[ip] - time.time()
+        if ipn in bans:
+            rt = bans[ipn] - time.time()
             if rt < 0:
                 logging.info("client unbanned")
-                del bans[ip]
+                del bans[ipn]
             else:
                 raise AuthenticationFailed("banned")
 
diff --git a/copyparty/svchub.py b/copyparty/svchub.py
index 39ac5093..199ccce9 100644
--- a/copyparty/svchub.py
+++ b/copyparty/svchub.py
@@ -433,7 +433,7 @@ class SvcHub(object):
 
         # create netmaps early to avoid firewall gaps,
         # but the mutex blocks multiprocessing startup
-        for zs in "ipu_iu ftp_ipa_nm tftp_ipa_nm".split():
+        for zs in "ipu_nm ftp_ipa_nm tftp_ipa_nm".split():
             try:
                 getattr(args, zs).mutex = threading.Lock()
             except: