diff --git a/src/moulinette/yunohost/app.py b/src/moulinette/yunohost/app.py
index 70d8f978..d1b84c38 100644
--- a/src/moulinette/yunohost/app.py
+++ b/src/moulinette/yunohost/app.py
@@ -610,7 +610,7 @@ def app_removeaccess(apps, users):
 
 def app_setting(app, key, value=None, delete=False):
     """
-    Set ou get an app setting value
+    Set or get an app setting value
 
     Keyword argument:
         value -- Value to set
diff --git a/src/moulinette/yunohost/firewall.py b/src/moulinette/yunohost/firewall.py
index ae83a7cc..1c4529c5 100644
--- a/src/moulinette/yunohost/firewall.py
+++ b/src/moulinette/yunohost/firewall.py
@@ -138,10 +138,14 @@ def firewall_reload(upnp=False):
 
     add_portmapping('TCP', upnp, False, 'r')
     add_portmapping('UDP', upnp, False, 'r')
+    ipv6 = False
 
     if os.path.exists("/proc/net/if_inet6"):
         add_portmapping('TCP', upnp, True, 'r')
         add_portmapping('UDP', upnp, True, 'r')
+        ipv6 = True
+    
+    hook_callback('post_iptable_rules', [upnp, ipv6])
 
     os.system("iptables -A INPUT -i lo -j ACCEPT")
     os.system("iptables -A INPUT -p icmp -j ACCEPT")
diff --git a/src/moulinette/yunohost/hook.py b/src/moulinette/yunohost/hook.py
index 2aea8706..4d7c7838 100644
--- a/src/moulinette/yunohost/hook.py
+++ b/src/moulinette/yunohost/hook.py
@@ -114,8 +114,8 @@ def hook_check(file):
         raise YunoHostError(22, _("Invalid app package"))
 
     action = file[file.index('scripts/') + 8:]
-    if action in manifest["arguments"]:
-        return manifest["arguments"][action]
+    if 'arguments' in manifest and action in manifest['arguments']:
+        return manifest['arguments'][action]
     else:
         return {}
 
diff --git a/src/moulinette/yunohost/tools.py b/src/moulinette/yunohost/tools.py
index 1300063c..4c8e0db0 100644
--- a/src/moulinette/yunohost/tools.py
+++ b/src/moulinette/yunohost/tools.py
@@ -224,8 +224,10 @@ def tools_postinstall(domain, password, dyndns=False):
                 os.system('touch /etc/yunohost/light')
             else:
                 os.system('service dspam stop')
+                os.system('chmod -x /etc/cron.daily/dspam')
                 os.system('update-rc.d dspam remove')
                 os.system('sed -i "s/yes/no/g" /etc/default/dspam')
+                os.system('sed -i "s/dspam=no/dspam=yes/" /etc/yunohost/yunohost.conf')
                 os.system('apt-get install -y -qq yunohost-config-amavis')
                 os.system('service amavis start')
                 os.system('apt-get install --reinstall -y -qq yunohost-config-postfix yunohost-config-dovecot')
diff --git a/yunohost.tac b/yunohost.tac
index af917180..b3d1ac61 100755
--- a/yunohost.tac
+++ b/yunohost.tac
@@ -42,8 +42,10 @@ def http_exec(request, **kwargs):
 
     # Simple HTTP auth
     elif installed:
-        authorized = request.getUser() == 'admin'
+        authorized = False
         pwd = request.getPassword()
+        if request.getUser() == 'admin' and pwd != '':
+            authorized = True
         if dev and 'api_key' in request.args:
             pwd = request.args['api_key'][0]
             authorized = True