Check Service Port Connection Status

checkportconn.sh

#!/bin/sh
#

# Change "currentserverport" Port 443 if not correct.

currentsship=$(w |grep pts/0 |awk '{print $3}')
currentserverip=$(ifconfig eth0 |grep broadcast |awk '{print $2}')
currentserverport="443"
currentserveripport=$currentserverip":"$currentserverport

if [ -z "$currentsship" ]
then
  echo "Unable get current ssh user ip"
  set -u "$currentsship"
  set -u "$currentserverip"
  set -u "$currentserverport"
  set -u "$currentserveripport"
  exit 0
else
  if [ -z "$currentserverip" ]
  then
    echo "Unable get current server ip"
    set -u "$currentsship"
    set -u "$currentserverip"
    set -u "$currentserverport"
    set -u "$currentserveripport"
    exit 0
  else
    if [ -z "$currentserverport" ]
    then
      echo "Server port set error"
      set -u "$currentsship"
      set -u "$currentserverip"
      set -u "$currentserverport"
      set -u "$currentserveripport"
      exit 0
    else
      echo "Current Client IP is:" "$currentsship"
      echo "Current Server IP and Service Port is:" "$currentserveripport"
      echo "Service Port Connection Status:"
      netstat -nt|grep -v "$currentsship" |grep "$currentserveripport"
      set -u "$currentsship"
      set -u "$currentserverip"
      set -u "$currentserverport"
      set -u "$currentserveripport"
      exit 0
    fi
  fi
fi