added rate limiting

bin/vmail-domains-add.sh

@@ -13,12 +13,13 @@ help()
   echo "$thisfilename"
   echo "Add domain to vmail system"
   echo ""
-  echo "usage: $thisfilename -d <domain> [-l <limit>] [-q <quota>] [-s <status>]"
+  echo "usage: $thisfilename -d <domain> [-l <limit>] [-q <quota>] [-r <ratelimit>] [-s <status>]"
   echo ""
   echo "  -h              Print this help."
   echo "  -d              Domain to add to vmail system."
   echo "  -l <limit>      Maximum number of mailboxes for this domain."
   echo "  -q <quota>      Default mailbox quota in GB."
+  echo "  -r <ratelimit>  Default mailbox sending rate limit per hour, multiplied by 10 for limit per day."
   echo "  -s <status>     1 for enabled, 0 for disabled."
   echo ""
   echo "                  Defaults for all Options are configured in database."
@@ -80,6 +81,16 @@ if [ "$rowcount" -eq '0' ] ; then
       exit 1
     fi
   fi
+  if [ ! -z "$ratelimit" ] ; then
+    if [[ "$ratelimit" == "NULL" ]]; then
+      dbquery="$dbquery, mbox_ratelimit_default=NULL"
+    elif [[ "$ratelimit" =~ ^[0-9]+$ ]]; then
+      dbquery="$dbquery, mbox_quota_default='$ratelimit'"
+    else
+      echo "ERROR: ratelimit (-r) must numeric or NULL"
+      exit 1
+    fi
+  fi
   dbquery="$dbquery;"
   # add domain to vmail database
   eval $dbcmd $dbcmdopts "\"$dbquery\""

bin/vmail-domains-mod.sh

@@ -12,12 +12,13 @@ help()
   thisfilename=$(basename -- "$0")
   echo "Modify an existing domain."
   echo ""
-  echo "usage: $thisfilename -d domain [OPTIONS]"
+  echo "usage: $thisfilename -d <domain> [OPTIONS]"
   echo ""
   echo "  -h              Print this help."
   echo "  -d              Domain to be modified."
-  echo "  -l LIMIT    Mailbox limit - the maximum number of mailboxes under this domain."
+  echo "  -l <limit>      Mailbox limit - the maximum number of mailboxes under this domain."
-  echo "  -q QUOTA    Mailbox Quota Default in GB - default quota for new mailboxes under this domain."
+  echo "  -q <quota>      Mailbox Quota Default in GB - default quota for new mailboxes under this domain."
+  echo "  -r <ratelimit>  Default mailbox sending rate limit per hour, multiplied by 10 for limit per day."
   echo "  -s <0|1>        Status. 1 for enabled, 0 for disabled. Default is in db structure and is normally set to 1."
   exit
 }
@@ -51,6 +52,18 @@ if [[ -n $quota ]]; then
   fi
 fi
 
+# check for ratelimit update
+if [[ -n $ratelimit ]]; then
+  # make ratelimit uppercase in case it is set to NULL
+  ratelimit=`echo $ratelimit | tr [:lower:] [:upper:]`
+  if [[ "$ratelimit" =~ ^[0-9]+$ ]] || [[ "$ratelimit" == "NULL" ]]; then
+    dbset=" mbox_ratelimit_default=$ratelimit"
+  else
+    echo "ERROR: ratelimit (-r) must numeric or NULL"
+    exit 1
+  fi
+fi
+
 # check for limit update
 if [[  -n $limit ]]; then
   # make limit uppercase in case it is set to NULL

bin/vmail-mboxes-add.sh

@@ -13,12 +13,13 @@ help()
   echo "$thisfilename"
   echo "Add email account to vmail system"
   echo ""
-  echo "usage: $thisfilename -e <email> -p <password> [-q <quota>] [-s <0|1>] [-j <0|1|2>] [-h]"
+  echo "usage: $thisfilename -e <email> -p <password> [-q <quota>] [-r <ratelimit>] [-s <0|1>] [-j <0|1|2>] [-h]"
   echo ""
   echo "  -h              Print this help."
   echo "  -e <email>      Email address to add."
   echo "  -p <password>   Unencrypted Password for new email address."
   echo "  -q <quota>      Set mailbox quota in GB, otherwise default for this domain is used. NULL means no limit."
+  echo "  -r <ratelimit>  Hourly rate limit for sending, multiplied by 10 for the daily limit."
   echo "  -s <0|1>        Status. 1 for enabled, 0 for disabled. Default is in db structure and is normally set to 1."
   echo "  -j <0|1|2>      Filter Junk/Spam messages. 0 = no filtering. 1 = filter Junk only. 2 = filter Junk & Spam. Default is 2."
 }
@@ -69,6 +70,18 @@ if [ "$rowcount" -eq '0' ] ; then
     echo "ERROR: quota (-q) must numeric or NULL"
     exit 1
   fi
+  if [ -z "$ratelimit" ] ; then
+    # get mbox_ratelimit_default from domains table
+    ratelimit=`mysql --defaults-extra-file=$MYSQL_CONNECTION_INFO_FILE -s -r -N -e "SELECT mbox_ratelimit_default from vm_domains WHERE domain='$domain';"`
+  fi
+  if [[ "$ratelimit" == "NULL" ]]; then
+    dbcmd="$dbcmd, ratelimit=NULL"
+  elif [[ "$ratelimit" =~ ^[0-9]+$ ]]; then
+    dbcmd="$dbcmd, ratelimit=\"$ratelimit\""
+  else
+    echo "ERROR: ratelimit (-r) must numeric or NULL"
+    exit 1
+  fi
   dbcmd="$dbcmd;'"
 elif [ "$rowcount" -eq '1' ] ; then
   echo "ERROR: $email already exists in vmail database."

bin/vmail-mboxes-get.sh

@@ -48,7 +48,7 @@ dbquery="SELECT vm_mboxes.mbox, vm_domains.domain"
 if [ -n "$verbose" ]; then
   dbquery="$dbquery, vm_mboxes.passwd"
 fi
-dbquery="$dbquery, vm_mboxes.status, vm_mboxes.quota, vm_mboxes.filter FROM vm_domains, vm_mboxes WHERE vm_domains.id=vm_mboxes.domain_id"
+dbquery="$dbquery, vm_mboxes.status, vm_mboxes.quota, vm_mboxes.ratelimit, vm_mboxes.filter FROM vm_domains, vm_mboxes WHERE vm_domains.id=vm_mboxes.domain_id"
 if [ -n "$mbox" ] && [ -n "$domain" ]; then
   # search for specific email address
   dbquery="$dbquery AND vm_domains.domain='$domain' AND vm_mboxes.mbox='$mbox'"

bin/vmail-mboxes-mod.sh

@@ -19,6 +19,7 @@ help()
   echo "  -e <email>      Email account to modify."
   echo "  -p <password>   Set new password."
   echo "  -q <quota>      Set mailbox quota in GB, otherwise default for this domain is used. NULL means no limit."
+  echo "  -r <ratelimit>  Hourly rate limit for sending, multiplied by 10 for the daily limit."
   echo "  -s <0|1>        1 for enabled, 0 for disabled. Default is in db structure and is normally set to 1."
   echo "  -j <0|1|2>      Filter Junk/Spam message. 0 = no filtering. 1 = filter Junk only. 2 = filter Junk & Spam. Default is 2."
   exit
@@ -55,6 +56,18 @@ if [ -n "$quota" ]; then
   fi
 fi
 
+# check for ratelimit update
+if [ -n "$ratelimit" ]; then
+  # make ratelimit uppercase in case it is set to NULL
+  ratelimit=`echo $ratelimit | tr [:lower:] [:upper:]`
+  if [[ "$ratelimit" =~ ^[0-9]+$ ]] || [[ "$ratelimit" == "NULL" ]]; then
+    dbset=" ratelimit=$ratelimit"
+  else
+    echo "ERROR: ratelimit (-r) must numeric or NULL"
+    exit 1
+  fi
+fi
+
 # check for password update
 if [ ! -z "$password" ]; then
   passwd=`doveadm -o stats_writer_socket_path= pw -s sha512-crypt -p "$password"`

bin/vmail.sh

@@ -85,7 +85,7 @@ function vmail::yesno() {
 
 function vmail:getoptions () {
   local OPTIND
-  while getopts "ha:b:d:e:f:gj:cp:q:s:tk:gl:m:vx" opt ; do
+  while getopts "ha:b:d:e:f:gj:cp:q:r:s:tk:gl:m:vx" opt ; do
     case "${opt}" in
         h ) # display help and exit
           help
@@ -181,6 +181,9 @@ function vmail:getoptions () {
         q ) # quota
           quota=${OPTARG}
           ;;
+        r ) # ratelimit - hourly limit for sending, multiplied by 10 for daily limit
+          ratelimit=${OPTARG}
+          ;;
         s ) # status - 0 or 1
           status=${OPTARG}
           ;;

etc/exim4/exim4.conf

@@ -364,11 +364,39 @@ acl_rcpt_to:
   accept
     hosts       = : +relay_from_hosts
 
-
   # Accept if the message arrived over an authenticated connection,
   # from any host. Again, these messages are usually from MUAs, so
   # recipient verification is omitted.
   #
+
+  # Get rate limit for user and log current rate.
+  # Hourly rate limit is extracted from db, multiplied by 10 to get daily rate limit.
+  # The idea being that the hourly rate limit should be a maximum, peak rate, not a sustained rate.
+  # The default ratelimit of 100000 is meant to be so high as to never be reached (no limit).
+  # The primary purpose of rate limiting is fighting spam, either by an abusive user or a
+  # compromised account, not to restrict legitimate users. Set your defaults & limits accordignly.
+  warn
+    authenticated = *
+    set acl_m_ratelimit_hourly = ${lookup mysql{SELECT vm_mboxes.ratelimit FROM vm_domains, vm_mboxes WHERE vm_domains.domain='${domain}' AND vm_mboxes.mbox='${local_part}' AND vm_domains.id = vm_mboxes.domain_id AND vm_mboxes.ratelimit IS NOT NULL}{$value}{"100000"}}
+    set acl_m_ratelimit_daily = ${eval: $acl_m_ratelimit_hourly * 10}
+    ratelimit = 0 / 1h / per_mail / strict / $authenticated_id
+    log_message = Sender rate $sender_rate/$sender_rate_period for $authenticated_id
+
+  # enforce hourly rate limit
+  deny
+    authenticated = *
+    ratelimit = $acl_m_ratelimit_hourly / 1h / per_mail / strict / $authenticated_id
+    message = Rate Limit of $sender_rate/$sender_rate_period exceeded. Try again later.
+    log_message = $authenticated_id exceeded rate limit of $sender_rate/$sender_rate_period
+
+  # enforce daily rate limit
+  deny
+    authenticated = *
+    ratelimit = $acl_m_ratelimit_daily / 1d / per_mail / strict / $authenticated_id
+    message = Rate Limit of $sender_rate/$sender_rate_period exceeded. Try again later.
+    log_message = $authenticated_id exceeded rate limit of $sender_rate/$sender_rate_period
+
+  # authenticated user did not exceed rate limits, accept message now
   accept
     authenticated = *
 

vmail.sql

@@ -4,17 +4,9 @@ SET SQL_MODE = "NO_AUTO_VALUE_ON_ZERO";
 START TRANSACTION;
 SET time_zone = "+00:00";
 
-
-/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
-/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
-/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;
-/*!40101 SET NAMES utf8mb4 */;
-
 --
 -- Database: `vmail`
 --
-CREATE DATABASE IF NOT EXISTS `vmail` DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;
-USE `vmail`;
 
 -- --------------------------------------------------------
 
@@ -22,114 +14,77 @@ USE `vmail`;
 -- Table structure for table `vm_aliases`
 --
 
-CREATE TABLE IF NOT EXISTS `vm_aliases` (
+CREATE TABLE `vm_aliases` (
-  `id` int(10) UNSIGNED NOT NULL AUTO_INCREMENT,
+  `id` int(10) UNSIGNED NOT NULL,
   `mbox_id` int(10) UNSIGNED NOT NULL,
-  `alias` varchar(128) NOT NULL,
+  `alias` varchar(128) NOT NULL
-  PRIMARY KEY (`id`),
-  KEY `mbox_delete_aliases` (`mbox_id`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
 
---
--- RELATIONSHIPS FOR TABLE `vm_aliases`:
---   `mbox_id`
---       `vm_mboxes` -> `id`
---
-
 -- --------------------------------------------------------
 
 --
 -- Table structure for table `vm_autoresponders`
 --
 
-CREATE TABLE IF NOT EXISTS `vm_autoresponders` (
+CREATE TABLE `vm_autoresponders` (
-  `id` int(10) UNSIGNED NOT NULL AUTO_INCREMENT,
+  `id` int(10) UNSIGNED NOT NULL,
   `mbox_id` int(10) UNSIGNED NOT NULL,
   `subject` varchar(128) NOT NULL,
   `body` text NOT NULL,
   `mode` enum('Vacation','Autoresponder') NOT NULL,
   `status` tinyint(1) NOT NULL DEFAULT 1,
   `start` datetime DEFAULT NULL,
-  `end` datetime DEFAULT NULL,
+  `end` datetime DEFAULT NULL
-  PRIMARY KEY (`id`),
-  UNIQUE KEY `autoresponder` (`mbox_id`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
 
---
--- RELATIONSHIPS FOR TABLE `vm_autoresponders`:
---   `mbox_id`
---       `vm_mboxes` -> `id`
---
-
 -- --------------------------------------------------------
 
 --
 -- Table structure for table `vm_domains`
 --
 
-CREATE TABLE IF NOT EXISTS `vm_domains` (
+CREATE TABLE `vm_domains` (
-  `id` int(11) UNSIGNED NOT NULL AUTO_INCREMENT,
+  `id` int(11) UNSIGNED NOT NULL,
   `domain` varchar(255) NOT NULL,
   `status` tinyint(1) NOT NULL DEFAULT 1 COMMENT '1 for enabled, 0 for disabled',
-  `mbox_limit` smallint(6) UNSIGNED DEFAULT NULL COMMENT 'Maximum number of mailboxes for this domain',
+  `mbox_limit` smallint(6) UNSIGNED DEFAULT 10 COMMENT 'Maximum number of mailboxes for this domain',
-  `mbox_quota_default` smallint(6) UNSIGNED DEFAULT NULL COMMENT 'Default mailbox quota in GB',
+  `mbox_quota_default` smallint(6) UNSIGNED DEFAULT 1 COMMENT 'Default mailbox quota in GB',
-  PRIMARY KEY (`id`),
+  `mbox_ratelimit_default` smallint(6) DEFAULT 120 COMMENT 'Default hourly rate limit for new mboxes'
-  KEY `domain` (`domain`(191))
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
 
---
--- RELATIONSHIPS FOR TABLE `vm_domains`:
---
-
 -- --------------------------------------------------------
 
 --
 -- Table structure for table `vm_filters`
 --
 
-CREATE TABLE IF NOT EXISTS `vm_filters` (
+CREATE TABLE `vm_filters` (
-  `id` int(10) UNSIGNED NOT NULL AUTO_INCREMENT,
+  `id` int(10) UNSIGNED NOT NULL,
   `mbox_id` int(11) UNSIGNED NOT NULL,
-  `filter` text NOT NULL,
+  `filter` text NOT NULL
-  PRIMARY KEY (`id`),
-  KEY `mbox_delete_filters` (`mbox_id`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
 
---
--- RELATIONSHIPS FOR TABLE `vm_filters`:
---   `mbox_id`
---       `vm_mboxes` -> `id`
---
-
 -- --------------------------------------------------------
 
 --
 -- Table structure for table `vm_forwards`
 --
 
-CREATE TABLE IF NOT EXISTS `vm_forwards` (
+CREATE TABLE `vm_forwards` (
-  `id` int(10) UNSIGNED NOT NULL AUTO_INCREMENT,
+  `id` int(10) UNSIGNED NOT NULL,
   `mbox_id` int(10) UNSIGNED NOT NULL,
   `forward_to` varchar(128) NOT NULL,
-  `save_local` tinyint(1) NOT NULL DEFAULT 0,
+  `save_local` tinyint(1) NOT NULL DEFAULT 0
-  PRIMARY KEY (`id`),
-  UNIQUE KEY `mbox_id` (`mbox_id`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
 
---
--- RELATIONSHIPS FOR TABLE `vm_forwards`:
---   `mbox_id`
---       `vm_mboxes` -> `id`
---
-
 -- --------------------------------------------------------
 
 --
 -- Table structure for table `vm_greylisting`
 --
 
-CREATE TABLE IF NOT EXISTS `vm_greylisting` (
+CREATE TABLE `vm_greylisting` (
-  `id` bigint(20) UNSIGNED NOT NULL AUTO_INCREMENT,
+  `id` bigint(20) UNSIGNED NOT NULL,
   `relay_hostname` varchar(255) DEFAULT NULL,
   `relay_ip` varchar(80) DEFAULT NULL,
   `sender` varchar(255) DEFAULT NULL,
@@ -140,56 +95,151 @@ CREATE TABLE IF NOT EXISTS `vm_greylisting` (
   `create_time` datetime NOT NULL DEFAULT '1000-01-01 00:00:00',
   `type` enum('AUTO','MANUAL') NOT NULL DEFAULT 'MANUAL',
   `passcount` bigint(20) NOT NULL DEFAULT 0,
-  `blockcount` bigint(20) NOT NULL DEFAULT 0,
+  `blockcount` bigint(20) NOT NULL DEFAULT 0
-  PRIMARY KEY (`id`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
 
---
--- RELATIONSHIPS FOR TABLE `vm_greylisting`:
---
-
 -- --------------------------------------------------------
 
 --
 -- Table structure for table `vm_greylisting_resenders`
 --
 
-CREATE TABLE IF NOT EXISTS `vm_greylisting_resenders` (
+CREATE TABLE `vm_greylisting_resenders` (
-  `id` bigint(20) NOT NULL AUTO_INCREMENT,
+  `id` bigint(20) NOT NULL,
   `hostname` varchar(255) NOT NULL,
   `count` bigint(20) UNSIGNED NOT NULL DEFAULT 1,
-  `timestamp` timestamp NOT NULL DEFAULT current_timestamp(),
+  `timestamp` timestamp NOT NULL DEFAULT current_timestamp()
-  PRIMARY KEY (`id`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
 
---
--- RELATIONSHIPS FOR TABLE `vm_greylisting_resenders`:
---
-
 -- --------------------------------------------------------
 
 --
 -- Table structure for table `vm_mboxes`
 --
 
-CREATE TABLE IF NOT EXISTS `vm_mboxes` (
+CREATE TABLE `vm_mboxes` (
-  `id` int(10) UNSIGNED NOT NULL AUTO_INCREMENT,
+  `id` int(10) UNSIGNED NOT NULL,
   `domain_id` int(10) UNSIGNED NOT NULL,
   `mbox` varchar(128) NOT NULL,
+  `username` varchar(128) NOT NULL,
   `passwd` char(128) NOT NULL,
   `status` tinyint(1) NOT NULL DEFAULT 1,
   `quota` int(10) UNSIGNED DEFAULT NULL,
-  `filter` tinyint(1) NOT NULL DEFAULT 2,
+  `ratelimit` smallint(6) DEFAULT NULL,
-  PRIMARY KEY (`id`),
+  `filter` tinyint(4) NOT NULL DEFAULT 2
-  KEY `email` (`domain_id`,`mbox`) USING BTREE
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
 
 --
--- RELATIONSHIPS FOR TABLE `vm_mboxes`:
+-- Indexes for dumped tables
---   `domain_id`
---       `vm_domains` -> `id`
 --
 
+--
+-- Indexes for table `vm_aliases`
+--
+ALTER TABLE `vm_aliases`
+  ADD PRIMARY KEY (`id`),
+  ADD KEY `mbox_delete_aliases` (`mbox_id`);
+
+--
+-- Indexes for table `vm_autoresponders`
+--
+ALTER TABLE `vm_autoresponders`
+  ADD PRIMARY KEY (`id`),
+  ADD UNIQUE KEY `autoresponder` (`mbox_id`);
+
+--
+-- Indexes for table `vm_domains`
+--
+ALTER TABLE `vm_domains`
+  ADD PRIMARY KEY (`id`),
+  ADD KEY `domain` (`domain`(191));
+
+--
+-- Indexes for table `vm_filters`
+--
+ALTER TABLE `vm_filters`
+  ADD PRIMARY KEY (`id`),
+  ADD KEY `mbox_delete_filters` (`mbox_id`);
+
+--
+-- Indexes for table `vm_forwards`
+--
+ALTER TABLE `vm_forwards`
+  ADD PRIMARY KEY (`id`),
+  ADD UNIQUE KEY `mbox_id` (`mbox_id`);
+
+--
+-- Indexes for table `vm_greylisting`
+--
+ALTER TABLE `vm_greylisting`
+  ADD PRIMARY KEY (`id`);
+
+--
+-- Indexes for table `vm_greylisting_resenders`
+--
+ALTER TABLE `vm_greylisting_resenders`
+  ADD PRIMARY KEY (`id`);
+
+--
+-- Indexes for table `vm_mboxes`
+--
+ALTER TABLE `vm_mboxes`
+  ADD PRIMARY KEY (`id`),
+  ADD UNIQUE KEY `username` (`username`),
+  ADD KEY `email` (`domain_id`,`mbox`) USING BTREE;
+
+--
+-- AUTO_INCREMENT for dumped tables
+--
+
+--
+-- AUTO_INCREMENT for table `vm_aliases`
+--
+ALTER TABLE `vm_aliases`
+  MODIFY `id` int(10) UNSIGNED NOT NULL AUTO_INCREMENT;
+
+--
+-- AUTO_INCREMENT for table `vm_autoresponders`
+--
+ALTER TABLE `vm_autoresponders`
+  MODIFY `id` int(10) UNSIGNED NOT NULL AUTO_INCREMENT;
+
+--
+-- AUTO_INCREMENT for table `vm_domains`
+--
+ALTER TABLE `vm_domains`
+  MODIFY `id` int(11) UNSIGNED NOT NULL AUTO_INCREMENT;
+
+--
+-- AUTO_INCREMENT for table `vm_filters`
+--
+ALTER TABLE `vm_filters`
+  MODIFY `id` int(10) UNSIGNED NOT NULL AUTO_INCREMENT;
+
+--
+-- AUTO_INCREMENT for table `vm_forwards`
+--
+ALTER TABLE `vm_forwards`
+  MODIFY `id` int(10) UNSIGNED NOT NULL AUTO_INCREMENT;
+
+--
+-- AUTO_INCREMENT for table `vm_greylisting`
+--
+ALTER TABLE `vm_greylisting`
+  MODIFY `id` bigint(20) UNSIGNED NOT NULL AUTO_INCREMENT;
+
+--
+-- AUTO_INCREMENT for table `vm_greylisting_resenders`
+--
+ALTER TABLE `vm_greylisting_resenders`
+  MODIFY `id` bigint(20) NOT NULL AUTO_INCREMENT;
+
+--
+-- AUTO_INCREMENT for table `vm_mboxes`
+--
+ALTER TABLE `vm_mboxes`
+  MODIFY `id` int(10) UNSIGNED NOT NULL AUTO_INCREMENT;
+
 --
 -- Constraints for dumped tables
 --
@@ -224,7 +274,3 @@ ALTER TABLE `vm_forwards`
 ALTER TABLE `vm_mboxes`
   ADD CONSTRAINT `domain_delete_mboxes` FOREIGN KEY (`domain_id`) REFERENCES `vm_domains` (`id`) ON DELETE CASCADE ON UPDATE NO ACTION;
 COMMIT;
-
-/*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */;
-/*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS */;
-/*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */;