Installing a http proxy cache like Polipo
can be advantageous in several ways. It makes internet access faster and has a filtering utility. As Polipo is only accessible from the machine on which it is installed, there is less security risk. The Polipo http proxy-cache can be installed in easy steps on a machine with a Linux operating system. Polipo also has a separate DNS cache
and does not access the operating system cache to retrieve DNS information
, but it can be configured to access other cache locations if required. Installing a http proxy cache
can speed up internet access to a great extent.
Installing an HTTP proxy cache on your computer can bring several advantages:
- It allows sharing of the Internet connection
- The cache will display pages faster, even if you do not share your connection
- It offers an optional filtering utility.
Polipo is an efficient and lightweight HTTP proxy cache.
sudo apt-get install polipo
Configure your software (e.g. web browser) to use localhost:8123
as the proxy.
Note that Polipo is accessible only from your machine, thus reducing security constraints.
Some of the configurable settings offered are:
- Setting the memory and disk cache
- Automatic filtering of HTTP headers such as user-agent, http-referer
- URL filter
Allowing hosts on the LAN to connect
If your LAN is 192.168.0.0/24 and your proxy server 192.168.0.1, edit the following file /etc/polipo/config
and add the lines:
proxyAddress = "192.168.0.1"
allowedClients = 127.0.0.1, 192.168.0.0/24
Then type sudo /etc/init.d/polipo restart
to take into account the new configuration.
Changing the port
To change the port on which Polipo listens, add the following proxyPort parameter to /etc/polipo/config
proxyPort = 3128
Remember to use sudo /etc/init.d/polipo restart
to apply changes.
Use a proxy server parent
If you want Polipo sends its own requests to another proxy, add the following parameter:
parentProxy = "squid.example.org: 3128"
Using an alternative DNS server
For enhanced performance, Polipo makes its own DNS resolutions without the use of the operating system.
It uses the DNS registered directly in /etc/resolv.conf
But you can request that Polipo use other DNS servers (e.g. to use OpenDNS). Simply add the following parameter:
dnsNameServer = 126.96.36.199, 188.8.131.52
If you are not using IPv6, add this parameter:
dnsQueryIPv6 = no
Learn more: Installing an HTTP proxy server (Squid)