Debian 9 Stretch
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Configure as a Reverse Proxy2017/06/26

 
Configure Squid as a reverse proxy server.
[1] Configure Squid.
root@prox:~#
vi /etc/squid/squid.conf
# near line 1192: add ( allow all http access )

http_access allow all
# line 1612: specify backend Web server

http_port
80 accel defaultsite=www.srv.world
# line 3053: add

cache_peer www.srv.world parent 80 0 no-query originserver
# line 3174: add (memory cache size)

cache_mem 256 MB
# line 3446: add

# number means ⇒ [disk cache size] [number of directories on top level] [number of directories on 2nd level]

cache_dir ufs /var/spool/squid 256 16 256
# line 5658: add (define hostname)

visible_hostname prox.srv.world
root@prox:~#
systemctl restart squid
[2] Change DNS or Router's settings if need, and make it listen http requests on Squid server. It's OK if backend http server responds like follows.
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