Script to automate install of Dansguardian with Squid as transparent proxy on Ubuntu without iptables (assuming that proxy is used by a router)

ubuntu_squid_dansguardian_transparent_proxy_setup.sh

#!/bin/bash
#based on https://help.ubuntu.com/community/DansGuardian
#refresh repositories
sudo apt-get update
# install packages
sudo apt-get install clamav-freshclam dansguardian squid curl
#turn squid into transparent proxy 
sudo sed -i 's/http_port 3128/http_port 3128 transparent/g' /etc/squid/squid.conf
#always direct allow all
sudo sed -i 's/#                always_direct allow local-servers/always_direct allow all/g' /etc/squid/squid.conf
#start squid
sudo service squid start
#configure dansguardian
sudo sed -i 's/^UNCONFIGURED .*$/g' /etc/dansguardian/dansguardian.conf
#configure blacklists
curl ftp://ftp.ut-capitole.fr/pub/reseau/cache/squidguard_contrib/blacklists.tar.gz| tar -xzf - -C /etc/dansguardian/lists/blacklists blacklists/
find /etc/dansguardian/lists/blacklists/ -type f -iname "domains"|sed 's/^\(.*\)$/.Include<\1>/g'>/etc/dansguardian/lists/bannedsitelist
find /etc/dansguardian/lists/blacklists/ -type f -iname "urls"|sed 's/^\(.*\)$/.Include<\1>/g'>/etc/dansguardian/lists/bannedurllist
#start dansguardian
sudo service dansguardian start
#refresh list 
sudo dansguardian -r

#configure crontab
echo "
00 00 * * * curl ftp://ftp.ut-capitole.fr/pub/reseau/cache/squidguard_contrib/blacklists.tar.gz| tar -xzf - -C /etc/dansguardian/lists/blacklists blacklists/
05 00 * * * find /etc/dansguardian/lists/blacklists/ -type f -iname 'domains'|sed 's/^\(.*\)$/.Include<\1>/g'>/etc/dansguardian/lists/bannedsitelist
10 00 * * * find /etc/dansguardian/lists/blacklists/ -type f -iname 'urls'|sed 's/^\(.*\)$/.Include<\1>/g'>/etc/dansguardian/lists/bannedurllist
15 00 * * * dansguardian -r" >/tmp/crontab
#set crontab 
crontab /tmp/crontab