Proxy de squid3

Primero abrimos el terminal de Ubuntu e instalamos squid3 con estas ordenes:
sudo apt-get install squid3 -y
sudo netstat -pluny | grep 3128
sudo service squid3 start
sudo gedit /etc/squid3/squid.conf y hacemos una copia de seguridad del original por si acaso
en el apartado de ALL TYPES hay que configurarlo mas o menos en las lineas 600-900

CONFIGURACION RECOMENDADA PRIMERA

# Recommended minimum configuration:
#
acl manager proto cache_object
acl localhost src 127.0.0.1/32 ::1
acl to_localhost dst 127.0.0.0/8 0.0.0.0/32 ::1

#Set ai1
acl ai1 src 192.168.1.0/24

acl SSL_ports port 443
acl Safe_ports port 80        # http
acl Safe_ports port 21        # ftp
acl Safe_ports port 443        # https
acl Safe_ports port 70        # gopher
acl Safe_ports port 210        # wais
acl Safe_ports port 1025-65535    # unregistered ports
acl Safe_ports port 280        # http-mgmt
acl Safe_ports port 488        # gss-http
acl Safe_ports port 591        # filemaker
acl Safe_ports port 777        # multiling http
acl CONNECT method CONNECT


http_access allow manager localhost
http_access deny manager

# Deny requests to certain unsafe ports
http_access deny !Safe_ports

# Deny CONNECT to other than secure SSL ports
http_access deny CONNECT !SSL_ports



#Add related http_access before localhost
http_access allow ai1
http_access allow localhost

# Squid normally listens to port 3128
http_port 3128


#Setup cache
cache_dir ufs /var/cache/squid 10000 16 256
cache_mem 600 MB
cache_swap_low                  70
cache_swap_high                 85
maximum_object_size             32768 KB

ipcache_size                    1024
ipcache_low                     90
ipcache_high                    95
fqdncache_size                  1024

#Add visible_hostname if you need
visible_hostname ai1pc100.ai1.local


SEGUNDA CONFIGURACION RECOMENDADA

sudo apt-get update
sudo apt-get upgrade


sudo apt-get install squid3 -y


sudo cp /etc/squid3/squid.conf /etc/squid3/squid.conf.original
sudo chmod a-w /etc/squid3/squid.conf.original


sudo gedit /etc/squid3/squid.conf

#    WELCOME TO SQUID 3.3.8
#    ----------------------------

# Recommended minimum configuration:
#

# Example rule allowing access from your local networks.
# Adapt to list your (internal) IP networks from where browsing
# should be allowed
#acl localnet src 10.0.0.0/8    # RFC1918 possible internal network
#acl localnet src 172.16.0.0/12    # RFC1918 possible internal network
#acl localnet src 192.168.0.0/16    # RFC1918 possible internal network
#acl localnet src fc00::/7       # RFC 4193 local private network range
#acl localnet src fe80::/10      # RFC 4291 link-local (directly plugged) machines

acl ai1 src 192.168.1.0/24

acl SSL_ports port 443
acl Safe_ports port 80        # http
acl Safe_ports port 21        # ftp
acl Safe_ports port 443        # https
acl Safe_ports port 70        # gopher
acl Safe_ports port 210        # wais
acl Safe_ports port 1025-65535    # unregistered ports
acl Safe_ports port 280        # http-mgmt
acl Safe_ports port 488        # gss-http
acl Safe_ports port 591        # filemaker
acl Safe_ports port 777        # multiling http
acl CONNECT method CONNECT

#  TAG: http_access
#    Allowing or Denying access based on defined access lists
#
#    Access to the HTTP port:
#    http_access allow|deny [!]aclname ...
#

#
# Recommended minimum Access Permission configuration:
#
# Deny requests to certain unsafe ports
http_access deny !Safe_ports

# Deny CONNECT to other than secure SSL ports
http_access deny CONNECT !SSL_ports

# Only allow cachemgr access from localhost
http_access allow localhost manager
http_access deny manager


# Example rule allowing access from your local networks.
# Adapt localnet in the ACL section to list your (internal) IP networks
# from where browsing should be allowed
#http_access allow localnet
http_access allow localhost
http_access allow ai1

# And finally deny all other access to this proxy
http_access deny all


# NETWORK OPTIONS
# -----------------------------------------------------------------------------

#  TAG: http_port
#    Usage:    port [mode] [options]
#        hostname:port [mode] [options]
#        1.2.3.4:port [mode] [options]
#

# Squid normally listens to port 3128
http_port 3128


sudo service squid3 start
[sudo] password for profes:
squid3 start/running, process 18260

sudo service squid3 status
squid3 start/running, process 18260