User manual

Network Setup
123
Transparent web cache with access control
You may choose to have the web cache and acess controls, including content filtering
and anti-virus, operate transparently. Transparent operation filters and caches web traffic
regardless of whether or not the clients on the LAN have specified an HTTP proxy in their
web browsers.
Select Packet Filtering from the Firewall menu, and click the Custom Firewall Rules
tab. Add the following Custom Firewall Rules:
iptables -t nat -D ContFilt -p tcp --dport 80 -j REDIRECT --to-port 81
iptables -t nat -A ContFilt -p tcp --dport 80 -j REDIRECT --to-port 3128
Click Update.
Select Advanced from the System menu, click the Configuration Files tab. Click the
Modify icon for squid.conf.
Add the following seven lines anywhere in the file:
httpd_accel_host virtual
httpd_accel_port 80
httpd_accel_with_proxy on
httpd_accel_uses_host_header on
cache_peer 127.0.0.1 parent 81 0 no-query default
acl authd proto HTTP
never_direct allow authd
Click Finish.
QoS Traffic Shaping
This advanced feature is provided for expert users to fine tune their network connections.
Traffic shaping allows you to give preference to certain types of network traffic to
maintain quality of service when a network connection is under heavy load.