= Squid =

**Summary**: How to install a squid proxy server. \\
**Date**: Around 2014 \\
**Refactor**: 22 March 2025: Checked links and formatting. \\
{{tag>apache linux}}

This is the article on installing and configuring squid on SLES11. The SLES 11 server is installed like [[sles11|this]]. Squid is in the support channel for SLES 11, so you'll also need to add the update repository to the server. See [[slesinstallationupdateserver11]] on how to do that. The end situation will be two networks (private and public), with squid in the middle and protected by the firewall for the public network.

= Firewall =

Yast -> 'Security and Users' -> 'Firewall'.

Config:

* Start automatically on boot
* Set eth0 as Internal zone
* Set eth1 as Demilitarized zone

Default Allowed services for internal zone are fine.

= Installing Squid =

Go to yast -> 'Software' -> 'Software Management'. Search for squid, and select the appropriate version in the list with search results. That is currently 2.7.STABLE5-2.4.1. Click 'Accept'.

= Configure Squid =

Can be done with yast -> 'Network Services' -> Squid.

* Service start when booting
* Squid HTTP port: 3128
* Cache setting default
* Cache directory default (/var/cache/squid)
* Access Control default
* Logging, Timeouts and Miscellaneous all default

== Extra Config ==

There is an extra configuration option which is a nice to have for troubleshooting and log handling etc. Configure the visible_hostname for this:

<code>
#  TAG: visible_hostname
#       If you want to present a special hostname in error messages, etc,
#       define this.  Otherwise, the return value of gethostname()
#       will be used. If you have multiple caches in a cluster and
#       get errors about IP-forwarding you must set them to have individual
#       names with this setting.
#
#Default:
# none
visib
le_hostname proxy.getshifting.com
</code>

== Proxy.pac ==

To make proxy.pac work create a file in the documentroot of apache. So we need apache:

Go to yast -> 'Software' -> 'Software Management'. Search for apache, and select the appropriate version in the list with search results. That is currently 2.2.10-2.24.5. Click 'Accept', as well as for the dependencies.

For further configuration check [[proxypac|here]].

== Apache Auto Start ==
Yast -> system -> runlevel

Change the runlevel for Apache to automatic.