Ubuntu Wiki

Directions to set up an internet proxy server for v. 8.0.4:

Description: Theses are instructions to setup and administer a Squid Proxy Server Procedure:

• Installation of Proxy Server
  • Install Squid using apt
    • apt-get install squid squid common
    • At this stage Squid is already running
  • Edit the Squid Configuration File for our needs
    • Add the following lines
      • http_port 3128 transparent

        • This sets the port number squid listens for http requests, it will also make squid a transparent proxy in the same step

      • acl our_networks src 192.168.1.0/24
        • adds the name our_networks to the acl with the value of 192.168.1.0/24
      • http_access allow our_networks
        • Uses the created acl our_networks to allow http_access to the internal network
      • cache_dir ufs /var/spool/squid 5000 16 256
        • This option increases the size of the cache to 5 GB (This may have to be raised. We need monitoring instructions so we can determine usage once the server is in use.)
• Todo
  • Direct all http traffic through the proxy using iptables (Will need to be done when this can be tested
    • iptables -t nat -A PREROUTING -i eth0 -p tcp -m tcp --dport 80 -j DNAT --to-destination 192.168.1.1:3128
    • iptables -t nat -A PREROUTING -i eth1 -p tcp -m tcp –dport 80 -j REDIRECT --to-ports 3128

  • Setup authentication and filtering based on group policy in ManageGroups

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