diff --git a/cloud-init/swarm-manager.yml b/cloud-init/swarm-manager.yml
index 96350b9..171422a 100644
--- a/cloud-init/swarm-manager.yml
+++ b/cloud-init/swarm-manager.yml
@@ -22,6 +22,15 @@ write_files:
     permissions: 0644
     owner: root:root
     content: |
+      *mangle
+      :PREROUTING ACCEPT [0:0]
+      :INPUT ACCEPT [0:0]
+      :FORWARD ACCEPT [0:0]
+      :OUTPUT ACCEPT [0:0]
+      :POSTROUTING ACCEPT [0:0]
+      -A PREROUTING -i eth0 -p tcp -m tcp --dport 2222 -j DROP
+      COMMIT
+
       *filter
       :INPUT DROP [0:0]
       :FORWARD DROP [0:0]
diff --git a/cloud-init/swarm-worker.yml b/cloud-init/swarm-worker.yml
index 2ff0d05..8bd69b5 100644
--- a/cloud-init/swarm-worker.yml
+++ b/cloud-init/swarm-worker.yml
@@ -23,6 +23,15 @@ write_files:
     permissions: 0644
     owner: root:root
     content: |
+      *mangle
+      :PREROUTING ACCEPT [0:0]
+      :INPUT ACCEPT [0:0]
+      :FORWARD ACCEPT [0:0]
+      :OUTPUT ACCEPT [0:0]
+      :POSTROUTING ACCEPT [0:0]
+      -A PREROUTING -i eth0 -p tcp -m tcp --dport 2222 -j DROP
+      COMMIT
+
       *filter
       :INPUT DROP [0:0]
       :FORWARD DROP [0:0]
diff --git a/nextcloud/etc/my.cnf.d/nextcloud.cnf b/nextcloud/etc/my.cnf.d/nextcloud.cnf
index e0b99fe..9e42809 100644
--- a/nextcloud/etc/my.cnf.d/nextcloud.cnf
+++ b/nextcloud/etc/my.cnf.d/nextcloud.cnf
@@ -1,6 +1,6 @@
 [server]
 skip_name_resolve = 1
-innodb_buffer_pool_size = 128M
+innodb_buffer_pool_size = 1G
 innodb_buffer_pool_instances = 1
 innodb_flush_log_at_trx_commit = 2
 innodb_log_buffer_size = 32M
@@ -14,13 +14,14 @@ max_heap_table_size= 64M
 slow_query_log = 1
 slow_query_log_file = /var/log/mysql/slow.log
 long_query_time = 1
+key_buffer_size = 64MB
 
 [client]
 default-character-set = utf8mb4
 
 [mysqld]
 character_set_server = utf8mb4
-collation_server = utf8mb4_general_ci
+collation_server = utf8mb4_bin
 transaction_isolation = READ-COMMITTED
 binlog_format = ROW
 innodb_large_prefix=on
diff --git a/nextcloud/etc/php/conf.d/redis-session.ini b/nextcloud/etc/php/conf.d/redis-session.ini
new file mode 100644
index 0000000..e60e4f0
--- /dev/null
+++ b/nextcloud/etc/php/conf.d/redis-session.ini
@@ -0,0 +1,5 @@
+session.save_handler = redis
+session.save_path = "tcp://redis:6379"
+redis.session.locking_enabled=1
+redis.session.lock_retries=-1
+redis.session.lock_wait_time=10000
diff --git a/nextcloud/var/www/html/nextcloud/config/config.s3.php b/nextcloud/var/www/html/nextcloud/config/config.s3.php
index 369b99d..198aaef 100644
--- a/nextcloud/var/www/html/nextcloud/config/config.s3.php
+++ b/nextcloud/var/www/html/nextcloud/config/config.s3.php
@@ -7,6 +7,10 @@ $CONFIG = array (
   array (
     0 => 'your_domain',
   ),
+  'trusted_proxies' =>
+  array (
+    0 => '10.0.0.0/16',
+  ),
   'datadirectory' => '/var/www/html/nextcloud/data',
   'dbtype' => 'mysql',
   'version' => '23.0.3.2',
@@ -23,6 +27,7 @@ $CONFIG = array (
   'memcache.distributed' => '\\OC\\Memcache\\Redis',
   'memcache.locking' => '\\OC\\Memcache\\Redis',
   'memcache.local' => '\\OC\\Memcache\\Redis',
+  'filelocking.enabled' => true,
   'log_type' => 'syslog',
   'logfile' => '',
   'loglevel' => '3',
@@ -61,7 +66,7 @@ $CONFIG = array (
   'mail_smtppassword' => '',
   'maintenance' => false,
   'default_phone_region' => 'IT',
-	'enable_previews' => true,
+  'enable_previews' => true,
   'preview_max_x' => 4096,
   'preview_max_y' => 4096,
   'preview_max_memory' => 768,