It's good that works, I followed your advice :
I have to create a bash script /etc/ebox/hooks/squid.postsetconf as this:
!/bin/sh
echo "cache_peer 127.0.0.1 parent 8118 7 no-query" >> /etc/squid/squid.conf
echo "never_direct allow all" >> /etc/squid/squid.conf
exit 0
Two new lines indeed are to add to the end of the file /etc/squid/squid.conf.
On the other hand in the file /etc/privoxy/config chapter 4. ACCESS CONTROL AND SECURITY section 4.1. listen-address I replaced this line :
listen-address localhost:8118
by
listen-address 127.0.0.1:8118
Curiously without this change that doesn't work.
A restart of HTTP PROXY SQUID and Privoxy. All works correctly, Squid and Privoxy indeed communicates between them
![Smiley :)](https://forum.zentyal.org/Smileys/default/smiley.gif)
Thank you very much, thanks to you I'm finally going to be able to an internet navigation which protects the private life