#!/bin/ksh93

#############################################################################
#
# Licensed Materials - Property of IBM
#
# 5608-E01
# 5608-E02
#
# (C) Copyright International Business Machines Corp. 2010.
# All rights reserved.
#
# US Government Users Restricted Rights - Use, duplication or disclosure 
# restricted by GSA ADP Schedule Contract with IBM Corp.
#
#############################################################################
#
# NAME:     dsmcvt2tcp
#
# FUNCTION: This script converts a TSM V6 database (TSMDB1) from using IPC 
#           db2 connections to TCP/IP db2 connections.
#
# USAGE:    See the "usage" function further down in the script
# 
#           This script requires the ksh93 version of korn shell.
#
#           This script must be run as root.
#
#           This script will:
#           1. Verify that IP Security is configured for both IPv4 and IPv6,
#              configuring it if requested (-c, and, optionally, -4).
#           2. Verify that the current TSMDB1 database in the instance is 
#              configured for local connections.
#           3. Reconfigure the database to use TCP/IP connections
#           4. Create IP Security filter rules to limit access to the 
#              DB2 service port to the localhost only.  This is not performed
#              if -n is specified.
#
# Change History:
# V1.0 - Initial Version - April 14, 2010
#
#############################################################################


#-------------------------------------------------------------------------------
# DB2 limitations are 8 characters or less for NODENAME, LOCALDB, and REMOTEDB
#-------------------------------------------------------------------------------
NODENAME=LOOPBK
LOCALDB=TSMDB1
REMOTEDB=TSMDB1_L

integer verbose=0    # set to 1 to see progress messages, set to 2 to see even more

#-------------------------------------------------------------------------------
# Do a quick check to make sure we're on AIX
#-------------------------------------------------------------------------------
if [[ "`uname -s`" != "AIX" ]]; then
  echo This script is for AIX only
  exit 9
fi

#-------------------------------------------------------------------------------
# Make sure we're root
#-------------------------------------------------------------------------------
if [[ `id -u` != 0 ]]; then
  echo "This script must be run as root"
  exit 13
fi

#-------------------------------------------------------------------------------
# Usage
#-------------------------------------------------------------------------------
usage()
{
  echo "\n$(basename $1) [-c4nh] instance_name"
  echo "  where"
  echo "    -c\t\t\tspecifies that the IP Security devices (ipsec_v4 and "
  echo "    \t\t\t  ipsec_v6) should be configured"
  echo "    -4\t\t\tspecifies that only IPv4 is to be configured, and that"
  echo "    \t\t\t  only IPv4 filter rules are to be defined"
  echo "    -n\t\t\tspecifies that no IP Security is to be configured and"
  echo "    \t\t\t  that no filter rules are to be defined"
  echo "    -h\t\t\tdisplays this help message"
  echo "    instance_name\tis the name of the instance to modify"
  echo ""
  echo "    Configuring IP Security is a two-step process.  The first step is to turn"
  echo "    on IP Security filtering by creating the ipsec_v4 and ipsec_v6 devices.  The"
  echo "    \"lsdev | grep ipsec\" command will show if they exist, are \"Defined\", or are"
  echo "    \"Available\".  They must be \"Available\" for this script to execute, unless -n"
  echo "    is specified to bypass all IP Security, or -4 is specified to limit setup to"
  echo "    IPv4 only.  If the devices are not \"Available\", the -c option will configure"
  echo "    them.  If you want to set up only IPv4 filtering, you can use -c4 to"
  echo "    configure just the ipsec_v4 device."
  echo ""
  echo "    The second step is to create filter rules to actually block access to the"
  echo "    port from other systems.  This is done after the conversion, and uses the"
  echo "    genfilt and mkfilt commands to create the rules to allow access to the port"
  echo "    from localhost, but deny access to the port from all other systems.  Both"
  echo "    IPv4 and IPv6 filter rules are created, unless -4 is specified to create"
  echo "    only IPv4 rules, or -n is specified to create no rules."
}

#-------------------------------------------------------------------------------
# Parse the command-line flags
#-------------------------------------------------------------------------------
integer v4Only=0
integer noSec=0
integer configSec=0

while getopts h4nc arg
do
  case $arg in
     4) 
       v4Only=1
       ;;
     n)
       noSec=1
       ;;
     c)
       configSec=1
       ;;
     *)
       usage $0
       exit 1
       ;;
   esac
done

if [[ $noSec == 1 && $configSec == 1 ]]; then
  echo "Do not specify both -c and -n"
  usage $0
  exit 10
fi

if [[ $noSec == 1 && $v4Only == 1 ]]; then
  echo "Do not specify both -4 and -n"
  usage $0
  exit 10
fi

shift $(($OPTIND - 1))

#-------------------------------------------------------------------------------
# Get the instance name from the command
#-------------------------------------------------------------------------------
INSTANCE=$1
if [[ "$INSTANCE" == "" ]]; then
  echo "Instance name not specified"
  usage $0
  exit 14
fi

#-------------------------------------------------------------------------------
# Validate that the instance exists
#-------------------------------------------------------------------------------
id $INSTANCE >/dev/null 2>&1
if [[ $? != 0 ]]; then
  echo "Instance user $INSTANCE does not exist"
  exit 14
fi

/opt/tivoi/tsm/db2/instance/db2ilist $INSTANCE >/dev/null 2>&1
if [[ $? != 0 ]]; then
  echo "$INSTANCE is not a valid TSM instance"
  exit 15
fi

db2cmd="su - $INSTANCE -c LANG=C db2"

#-------------------------------------------------------------------------------
# Before proceeding, let's make sure the IPSEC stuff is configured.
#-------------------------------------------------------------------------------
if [[ $noSec == 0 ]]; then
  v4Status=`/usr/sbin/ipsecstat -d | grep ipsec_v4 | awk '{print $2}'`
  v6Status=`/usr/sbin/ipsecstat -d | grep ipsec_v6 | awk '{print $2}'`

  if [[ "$verbose" != 0 ]]; then
    echo "IPSec for IPv4 status: $v4Status"
    echo "IPSec for IPv6 status: $v6Status"
  fi

  if [[ "$v4Status" != "Available" ]]; then
    if [[ $configSec == 1 ]]; then
      echo "Configuring IP Security for IPv4"
      /usr/sbin/mkdev -c ipsec -t 4
      /usr/sbin/mkfilt -v 4 -u -z p
    else
      echo "IP Security for IPv4 is not configured"
      echo "Configure it manually, or specify -c to autoconfigure it"
      exit 10
    fi
  fi

  if [[ "$v6Status" != "Available" ]]; then
    if [[ $v4Only != 1 ]]; then
      if [[ $configSec == 1 ]]; then
        echo "Configuring IP Security for IPv6"
        /usr/sbin/mkdev -c ipsec -t 6
        /usr/sbin/mkfilt -v 6 -u -z p
      else
        echo "IP Security for IPv6 is not configured"
        echo "Configure it manually, specify -c to autoconfigure it, or specify -4 to bypass"
        exit 11
      fi
    fi
  fi
fi

SERVICE=DB2_${INSTANCE}

#-------------------------------------------------------------------------------
# The following arrays are for the database directory
#-------------------------------------------------------------------------------
integer dbCount dbIndex dbExists dbIsLocal
set -A dbAlias
set -A dbNode
set -A dbName
set -A dbType
set -A dbDir


#-------------------------------------------------------------------------------
# The following arrays are for the node directory
#-------------------------------------------------------------------------------
integer nodeCount nodeIndex nodeExists
set -A nodeName
set -A nodeType
set -A nodeHostname
set -A nodeService

#-------------------------------------------------------------------------------
# DB2 must be running for this to work, but all connections must be stopped
#-------------------------------------------------------------------------------
$db2cmd stop dbm force
$db2cmd start dbm

#-------------------------------------------------------------------------------
# This function parses the information from DB2 LIST DATABASE DIRECTORY
# into a series of arrays for use by other functions.
#-------------------------------------------------------------------------------
parseDbDirectory()
{
  integer i=0
  dbCount=-1

  while read a b c d e f g h i j; do
    case $a in
      Database)
        case $b in
          alias)
             dbAlias[$dbCount]=$d
             ;;
          name)
             dbName[$dbCount]=$d
             ;; 
          *)
             if [[ "$c" == "entry:" ]]; then
               dbCount=dbCount+1
             fi
            ;;
        esac
        ;;

      Directory)
        if [[ "$b" == "entry" && "$c" == "type" ]]; then
          dbType[$dbCount]=$e    # Either Indirect or Remote
        fi
	;;

      Local)
        if [[ "$b" == "database" && "$c" == "directory" ]]; then
          dbDir[$dbCount]=$e
        fi 
        ;;

      Node)
        dbNode[$dbCount]=$d
        ;;

      *)
        ;;
    esac
  done

  if [[ $verbose == 2 ]]; then
    while [[ $i -le $dbCount ]]; do
      echo "For entry " $i
      echo "  dbName is   " ${dbName[$i]}
      echo "  dbAlias is  " ${dbAlias[$i]}
      echo "  dbType is   " ${dbType[$i]}
      echo "  dbDir is    " ${dbDir[$i]}
      echo "  dbNode is   " ${dbNode[$i]}
      ((i+=1))
    done
  fi
}


#-------------------------------------------------------------------------------
# This function checks to see if the indicated database exists
#-------------------------------------------------------------------------------
checkDBExists()
{
  integer i=0
  typeset -u dbToCheck=$1

  dbExists=0

  if [[ $verbose != 0 ]]; then
    echo "Checking to see if database $dbToCheck exists"
  fi

  while [[ $i -le $dbCount ]]; do
    if [[ "${dbName[$i]}" == "$dbToCheck" ]]; then
      echo "$dbToCheck exists as a database name"
      dbExists=1
    fi

    if [[ "${dbAlias[$i]}" == "$dbToCheck" ]]; then
      echo "$dbToCheck exists as a database alias"
      dbExists=1
    fi
    ((i+=1))
  done

  if [[ $verbose != 0 ]]; then
    if [[ $dbExists == 1 ]]; then
      echo "Database $dbToCheck exists"
    else
      echo "Database $dbToCheck does not exist"
    fi
  fi
}


#-------------------------------------------------------------------------------
# This function checks to see if the indicated database is local.  A
# database is local if the name and alias are the same and the type 
# is indirect.  Anything else means a non-standard configuration
#-------------------------------------------------------------------------------
checkDBLocal()
{
  integer i=0
  typeset -u dbToCheck=$1

  dbExists=0
  dbIsLocal=1

  if [[ $verbose != 0 ]]; then
    echo "Checking to see if database $dbToCheck exists and is local"
  fi

  while [[ $i -le $dbCount ]]; do
    if [ "${dbName[$i]}" == "$dbToCheck" ]; then

      if [[ $verbose != 0 ]]; then
        echo "Database $dbToCheck exits - validating"
      fi

      dbExists=1
      dbIndex=$i

      if [[ "${dbType[$i]}" != "Indirect" ]]; then
        echo "Database type of $dbToCheck is not Indirect"
        dbIsLocal=0
      fi

      if [[ "${dbName[$i]}" != "${dbAlias[$i]}" ]]; then
        echo "Database name (${dbName[$i]}) does not match alias (${dbAlias[$i]})"
        dbIsLocal=0
      fi

      if [[ $verbose != 0 ]]; then
        if [[ $dbIsLocal == 1 ]]; then
          echo "Checking complete - database is local"
        else
          echo "Checking complete - database is not local"
        fi
      fi
      break;
    fi
    ((i+=1))
  done

  if [[ $verbose != 0 && $dbExists = 0 ]]; then
    echo "Database $dbToCheck does not exist"
  fi  
}

#-------------------------------------------------------------------------------
# This function parses the information from DB2 LIST NODE DIRECTORY
# into a series of arrays for use by other functions.
#-------------------------------------------------------------------------------
parseNodeDirectory()
{
  integer i
  nodeCount=-1

  while read a b c d e f g h i j; do
    case $a in
      Node)
        case $b in
          name)
             nodeName[$nodeCount]=$d
             ;;
          *)
             if [[ "$c" == "entry:" ]]; then
               nodeCount=nodeCount+1
             fi
            ;;
        esac
        ;;

      Directory)
        if [[ "$b" == "entry" && "$c" == "type" ]]; then
          nodeType[$nodeCount]=$e    # Should be LOCAL
        fi
	;;

      Hostname)
        nodeHostname[$nodeCount]=$c
        ;;

      Service)
        if [[ "$b" == "name" ]]; then
          nodeService[$nodeCount]=$d
        fi
        ;;

      *)
        ;;
    esac
  done

  if [[ $verbose == 2 ]]; then
    while [[ $i -le $nodeCount ]]; do
      echo "For entry " $i
      echo "  nodeName is     " ${nodeName[$i]}
      echo "  nodeType is     " ${nodeType[$i]}
      echo "  nodeHost is     " ${nodeHostname[$i]}
      echo "  nodeService is  " ${nodeService[$i]}
      ((i+=1))
     done
  fi
}

#-------------------------------------------------------------------------------
# This function checks to see if the node exists.  We cannot catalog a node
# that already exists, so we need to make sure it doesn't exist.  However,
# if it does exist, and is properly configured, we can use it.
#-------------------------------------------------------------------------------
checkNode()
{
  integer i
  typeset -u nodeToCheck=$1

  if [ $verbose != 0 ]; then
    echo "Checking to see if node $nodeToCheck exists"
  fi

  nodeExists=0
  nodeOk=1

  while [[ $i -le $nodeCount ]]; do
    if [[ "${nodeName[$i]}" == "$nodeToCheck" ]]; then

      if [[ $verbose != 0 ]]; then
        echo "Node $nodeToCheck exits - validating"
      fi
      nodeExists=1
      nodeIndex=$i

      if [[ "${nodeType[$i]}" != "LOCAL" ]]; then
        echo "Node type of node $nodeToCheck is not LOCAL"
        nodeOk=0
      fi

      if [[ "${nodeHostname[$i]}" != "127.0.0.1" &&
            "${nodeHostname[$i]}" != "localhost" ]]; then
        echo "Hostname for node $nodeToCheck is not 127.0.0.1 or localhost"
        nodeOk=0
      fi

      #
      # Make sure the service is configured properly
      #
      checkService ${nodeService[$i]}

      if [[ $serviceExists == 0 ]]; then
        echo "Service ${nodeService[$i]} does not exist in /etc/services"
        nodeOk=0
      fi

      if [ $verbose != 0 ]; then
        if [ $nodeOk == 1 ]; then
          echo "Checking complete - node is valid"
        else
          echo "Checking complete - node is invalid"
        fi
      fi
      break;
    fi
    ((i+=1))
  done

  if [[ $verbose != 0 && $nodeExists == 0 ]]; then
    echo "Node $nodeToCheck does not exist"
  fi  
}


#-------------------------------------------------------------------------------
# This function checks to see if the named service exists in /etc/services.
# If it doesn't exist, this would indicate a setup failure for the instance.
#-------------------------------------------------------------------------------
checkService()
{
  service=$1

  if [[ $verbose != 0 ]]; then
    echo "Validating service $service in /etc/services"
  fi

  grep -q $service /etc/services
  if [[ $? != 0 ]]; then
    echo "Entry ${service} is missing from /etc/services"
    serviceExists=0
  fi

  grep -q ${service}_1 /etc/services
  if [[ $? != 0 ]]; then
    echo "Entry ${service}_1 is missing from /etc/services"
    serviceExists=0
  fi

  grep -q ${service}_2 /etc/services
  if [[ $? != 0 ]]; then
    echo "Entry ${service}_2 is missing from /etc/services"
    serviceExists=0
  fi

  grep -q ${service}_END /etc/services
  if [[ $? != 0 ]]; then
    echo "Entry ${service}_END is missing from /etc/services"
    serviceExists=0
  fi
}

#-------------------------------------------------------------------------------
# As part of error recovery, this recatalogs the local database
#-------------------------------------------------------------------------------
recatalogDB()
{
  echo "Cleaning up from failed conversion"
  $db2cmd uncatalog database $LOCALDB
  $db2cmd uncatalog database $REMOTEDB
  $db2cmd catalog database $LOCALDB on ${dbDir[$dbIndex]}
  if [[ $? == 0 ]]; then
    echo "Recataloged local database $LOCALDB"
  else
    echo "An error occurred recataloging database"
    echo "The command to use is:  db2 catalog database $LOCALDB on ${dbDir[$dbIndex]}"
  fi
  $db2cmd stop dbm
}

#-------------------------------------------------------------------------------
# Set up the NODE arrays
#-------------------------------------------------------------------------------
if [[ $verbose != 0 ]]; then
  echo "Parsing output of DB2 LIST NODE DIRECTORY command"
fi
$db2cmd list node directory | parseNodeDirectory

#
# Make sure the loopbk node isn't defined, or if it is defined,
# it is set up properly
#
checkNode $NODENAME

if [[ $nodeExists == 1 && $nodeOk == 0 ]]; then
  echo "Node LOOPBK already exists but is not configured correctly"
  exit 1
fi

#-------------------------------------------------------------------------------
# Set up the DB arrays
#-------------------------------------------------------------------------------
if [[ $verbose != 0 ]]; then
  echo "Parsing output of DB2 LIST DATABASE DIRECTORY command"
fi
$db2cmd list database directory | parseDbDirectory

checkDBExists $REMOTEDB
if [[ $dbExists == 1 ]]; then
  echo "Database $REMOTEDB exists - Terminating"
  exit 2
fi

checkDBLocal ${LOCALDB}
if [[ $dbExists == 1 ]]; then
  if [[ $dbIsLocal == 0 ]]; then
    echo "Database $LOCALDB cannot be converted - database is not local"
    exit 3
  fi
else
  echo "Database $LOCALDB cannot be convert - database not found"
  exit 4
fi

#-------------------------------------------------------------------------------
# Make sure the service for the instance is set up properly
#-------------------------------------------------------------------------------
checkService ${INSTANCE}
if [[ $serviceExists == 0 ]]; then
  echo "Entries in /etc/services for instance $INSTANCE are missing"
  exit 4
fi


#-------------------------------------------------------------------------------
# At this point, we know that the database exists and is local.  We also know that  
# the "remote" variation of the name does not exist, and we know that the node 
# either doesn't exist, or is configured properly.  Furthermore, the service we
# are going to use is set up in /etc/services.  We're all set to proceed.
#-------------------------------------------------------------------------------

#-------------------------------------------------------------------------------
# First, uncatalog the local database
#-------------------------------------------------------------------------------
if [[ $verbose != 0 ]]; then
  echo "Uncataloging local database $LOCALDB"
fi
$db2cmd uncatalog database $LOCALDB
if [[ $? != 0 ]]; then
  echo "Error uncataloging local database $LOCALDB"
  exit 5
fi

#-------------------------------------------------------------------------------
# Next, catalog the node if we need to
#-------------------------------------------------------------------------------
if [[ $nodeExists == 0 ]]; then
  if [[ $verbose != 0 ]]; then
    echo "Cataloging TCPIP node $NODENAME"
  fi
  $db2cmd catalog tcpip node $NODENAME remote 127.0.0.1 server ${SERVICE}
  if [[ $? != 0 ]]; then
    echo "Error cataloging node $NODENAME for 127.0.0.1 using service $SERVICE"
    recatalogDB
    exit 5
  fi
  echo "Created node $NODENAME for localhost using service $SERVICE"
fi

#-------------------------------------------------------------------------------
# Next, recatalog the database using the remote alias.
#-------------------------------------------------------------------------------
if [[ $verbose != 0 ]]; then
  echo "Cataloging database $LOCALDB as alias $REMOTEDB"
fi
$db2cmd catalog database $LOCALDB as $REMOTEDB on ${dbDir[$dbIndex]}
if [[ $? != 0 ]]; then
  echo "Error cataloging $LOCALDB under name $REMOTEDB"
  recatalogDB
  exit 6
fi

#-------------------------------------------------------------------------------
# Next, catalog the local name as an alias to the remote name using
# the node we just set up
#-------------------------------------------------------------------------------
if [[ $verbose != 0 ]]; then
  echo "Cataloging database $REMOTEDB as alias to $LOCALDB using node $NODENAME"
fi
$db2cmd catalog database $REMOTEDB as $LOCALDB at node $NODENAME
if [[ $? != 0 ]]; then
  echo "Error cataloging $REMOTEDB under name $LOCALDB on remote node $NODENAME"
  recatalogDB
  exit 6
fi

#-------------------------------------------------------------------------------
# Next, configure the DB2 instance to use TCPIP with the correct service
#-------------------------------------------------------------------------------
if [[ $verbose != 0 ]]; then
  echo "Updating the DBM CONFIG for instance $INSTANCE"
fi
$db2cmd update dbm cfg using AUTHENTICATION CLIENT
if [[ $? != 0 ]]; then
  echo "Error updating DBM CONFIG to use CLIENT authentication"
  recatalogDB
  exit 7
fi

$db2cmd update dbm cfg using TRUST_CLNTAUTH CLIENT
if [[ $? != 0 ]]; then
  echo "Error updating DBM CONFIG to use CLIENT for TRUST_CLNTAUTH"
  recatalogDB
  exit 7
fi

$db2cmd update dbm cfg using SVCENAME ${SERVICE}
if [[ $? != 0 ]]; then
  echo "Error updating DBM CONFIG to use service $SERVICE"
  recatalogDB
  exit 7
fi

$db2cmd update dbm cfg using NUM_POOLAGENTS 0
if [[ $? != 0 ]]; then
  echo "Error updating DBM CONFIG to turn off connection pooling"
fi

if [[ $verbose != 0 ]]; then
  echo "Setting instance $INSTANCE to use TCPIP"
fi
${db2cmd}set -i $INSTANCE DB2COMM=TCPIP
if [[ $? != 0 ]]; then
  echo "Error setting instance $INSTANCE to use TCP/IP communications"
  echo "Issue the \"db2set -i $INSTANCE DB2COMM=TCPIP\" command"
  ${db2cmd} stop dbm
  exit 7
fi

if [[ $verbose != 0 ]]; then
  echo "Stopping DB2"
fi

${db2cmd} stop dbm

#-------------------------------------------------------------------------------
# Define the filters to protect the main port
#-------------------------------------------------------------------------------
if [[ $noSec == 0 ]]; then
  mainPort=`grep DB2_${INSTANCE} /etc/services | grep -v DB2_${INSTANCE}_ | awk '{print $2}'`
  mainPort=${mainPort%%/tcp}

  #-----------------------------------------------------------------------------
  # The following rule permits access to the main IP port by localhost
  #-----------------------------------------------------------------------------
  /usr/sbin/genfilt -v 4 -a P -s 127.0.0.1 -m 255.255.255.255 -d 0.0.0.0 -i all \
                    -M 0.0.0.0 -c tcp -o any -p 0 -O eq -P $mainPort -w I
  if [[ $? != 0 ]]; then
    echo "Error creating IP Security filter rule - please do this manually:"
    echo "/usr/sbin/genfilt -v 4 -a P -s 127.0.0.1 -m 255.255.255.255 -d 0.0.0.0"\
         " -M 0.0.0.0 -c tcp -o any -p 0 -O eq -P $mainPort -w I"
  fi

  #-----------------------------------------------------------------------------
  # The following rule denies access to the main IP port by all other systems
  #-----------------------------------------------------------------------------
  /usr/sbin/genfilt -v 4 -a D -s 0.0.0.0 -m 0.0.0.0 -d 0.0.0.0 -M 0.0.0.0  -c tcp \
                    -o any -p 0 -O eq -P $mainPort -w I -i all
  if [[ $? != 0 ]]; then
    echo "Error creating IP Security filter rule - please do this manually:"
    echo "/usr/sbin/genfilt -v 4 -a D -s 0.0.0.0 -m 0.0.0.0 -d 0.0.0.0 -M 0.0.0.0"\
         " -c tcp -o any -p 0 -O eq -P $mainPort -w I"
  fi

  #-----------------------------------------------------------------------------
  # The following command activates the 2 rules we just created
  #-----------------------------------------------------------------------------
  /usr/sbin/mkfilt -v4 -u
  if [[ $? != 0 ]]; then
    echo "Error activating the IP Security filter rules - please do this manually:"
    echo "/usr/sbin/mkfilt -v4 -u"
  fi

  if [[ $v4Only == 0 ]]; then
    #---------------------------------------------------------------------------
    # The following rule permits access to the main IP port by localhost
    #---------------------------------------------------------------------------
    /usr/sbin/genfilt -v 6 -a P -s "::1" -m "128" -d 0 -M 0 -i all \
                      -c tcp -o any -p 0 -O eq -P $mainPort -w I
    if [[ $? != 0 ]]; then
      echo "Error creating IP Security filter rule - please do this manually:"
      echo "/usr/sbin/genfilt -v 6 -a P -s "::1" -m "128" -d 0 -i all " \
                            " -M 0 -c tcp -o any -p 0 -O eq -P $mainPort -w I"
    fi

    #---------------------------------------------------------------------------
    # The following rule denies access to the main IP port by all other systems
    #---------------------------------------------------------------------------
    /usr/sbin/genfilt -v 6 -a D -s 0 -m 0 -d 0 -M 0 -i all \
                      -c tcp -o any -p 0 -O eq -P $mainPort -w I
    if [[ $? != 0 ]]; then
      echo "Error creating IP Security filter rule - please do this manually:"
      echo "/usr/sbin/genfilt -v 6 -a D -s 0 -m 0 -d 0 -M 0 -i all " \
                            " -c tcp -o any -p 0 -O eq -P $mainPort -w I"
    fi

    #---------------------------------------------------------------------------
    # The following command activates the 2 rules we just created
    #---------------------------------------------------------------------------
    /usr/sbin/mkfilt -v6 -u
    if [[ $? != 0 ]]; then
      echo "Error activating the IP Security filter rules - please do this manually:"
      echo "/usr/sbin/mkfilt -v6 -u"
    fi
  fi
fi

echo "Conversion completed successfully"