BASH: Automate UFW installation on Raspberry Pi

install_UFW_pi.sh

#!/bin/bash

# **************************************************
# FILENAME: install_UFW.sh
# DATE: DEC 2021
# AUTHOR: RCombs
#
# PURPOSE: Install UFW on Raspberry Pi
# **************************************************

if [ "$EUID" -ne 0 ]
  then echo "Please run as root.  Exiting..."
  exit
fi

NOW=$( date '+%F_%H:%M:%S' )
logtemp=/tmp/$(hostname)_install-UFW_log_file_$NOW.log
log=/tmp/$(hostname)_install-UFW_log_file_$NOW.log
NAS=/NAS
NAS=/NAS/nagios

date >> $logtemp
# append date to log file
exec 3>&1 4>&2
trap 'exec 2>&4 1>&3' 0 1 2 3
exec 1>$logtemp 2>&1
set -xv
echo "$(date) : installation of UFW to $(hostname) starting..." >&3
echo >&3
echo "Checking for the NAS Mount, first..... " >&3

if ! test -f $NAS; then
        echo "The NAS does not seem to be configured....Checking fstab..." >&3
        if ! grep -qa 192.168.0.5 /etc/fstab; then
			echo "NAS is not mounted on this host - Exiting"
			exit
		else
			mount $NAS
			echo "NAS drive mounted" >&3
		fi
       if test -f $NAS; then
                echo "Verified - NAS is mounted...Installing UFW" >&3
        else
                echo "There was an error creating the NAS mount" >&3
		exit;
        fi
else
	echo "NAS is mounted - Installing UFW" >&3
fi

apt install ufw -y >&3
echo "ufw limit from 192.168.0.0/24  to any port 22 <---SSH"
ufw limit from 192.168.0.0/24  to any port 22
echo "ufw allow from 192.168.0.0/24  to any port 123 <---NTP"
ufw allow from 192.168.0.0/24  to any port 123
echo "ufw allow from 192.168.0.0/24  to any port 111 <---NAS"
ufw allow from 192.168.0.0/24  to any port 111
echo "ufw allow from 10.10.11.26 to any port 5666 <---Nagios"
ufw allow from 10.10.11.26 to any port 5666
echo "ufw allow from 192.168.0.6 to any port 10050 <---Zabbix"
ufw allow from 192.168.0.6 to any port 10050
echo "ufw allow from 192.168.0.0/24  to any port 80 <---HTTP"
ufw allow from 192.168.0.0/24  to any port 80
echo "ufw allow from 192.168.0.0/24  to any port 10000 <---Webmin"
ufw allow from 192.168.0.0/24  to any port 10000
echo "ufw allow from 192.168.0.5  to any port 2049 <---NAS"
ufw allow from 192.168.0.5  to any port 2049
echo "ufw enable -y"
echo "y" | sudo ufw enable
echo "ufw status verbose"
ufw status verbose
systemctl status ufw >&3
echo "$(date) : UFW installation to $(hostname) completed." >&3
echo >&3
cp $logtemp $log
echo "See $log for details" >&3