Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Squid offers a rich access control, authorization and logging environment to develop web proxy and content serving applications.The Squid caching proxy server can also be configured as a reverse proxy to redirect http (Port 80) connections. When acting as a reverse proxy, the cached content is delivered from the proxy server to the client without exposing the origin of the web server or data on the internal network.
The RPM package containing this service: squid
Service Control
To obtain the squid service, install the squid RPM package using yum.
# yum install squid .... Dependencies Resolved ==================================================================================================================== Package Arch Version ==================================================================================================================== Installing: squid x86_64 7:3.5.20-10.el7 Installing for dependencies: libecap x86_64 1.0.0-1.el7 libtool-ltdl x86_64 2.4.2-22.el7_3 perl-Compress-Raw-Bzip2 x86_64 2.061-3.el7 perl-Compress-Raw-Zlib x86_64 1:2.061-4.el7 perl-DBI x86_64 1.627-4.el7 perl-Data-Dumper x86_64 2.145-3.el7 perl-Digest noarch 1.17-245.el7 perl-Digest-MD5 x86_64 2.52-3.el7 perl-IO-Compress noarch 2.061-2.el7 perl-Net-Daemon noarch 0.48-5.el7 perl-PlRPC noarch 0.2020-14.el7 squid-migration-script x86_64 7:3.5.20-10.el7 Transaction Summary ==================================================================================================================== Install 1 Package (+12 Dependent packages) Total download size: 4.5 M Installed size: 14 M Is this ok [y/d/N]:
To manage the squid service for future system shutdowns and reboots, use the chkconfig tool:
# chkconfig squid on # chkconfig --list squid squid 0:off 1:off 2:on 3:on 4:on 5:on 6:off # chkconfig squid off
To control the squid service immediately, use the service tool:
# service squid
Usage: /etc/init.d/squid {start|stop|status|reload|restart|condrestart} Configuration
The configuration file for squid is /etc/squid/squid.conf :
# cat /etc/squid/squid.conf # WELCOME TO SQUID 2.6.STABLE6 # ---------------------------- # # This is the default Squid configuration file. You may wish # to look at the Squid home page (http://www.squid-cache.org/) # for the FAQ and other documentation. # # The default Squid config file shows what the defaults for # various options happen to be. If you don't need to change the # default, you shouldn't uncomment the line. Doing so may cause # run-time problems. In some cases "none" refers to no default # setting at all, while in other cases it refers to a valid # option - the comments for that keyword indicate if this is the # case. # # NETWORK OPTIONS # ----------------------------------------------------------------------------- # TAG: http_port # Usage: port [options] # hostname:port [options] # 1.2.3.4:port [options] http_port 80 # Port of Squid proxy httpd_accel_host 10.10.1.110 # IP address of web server httpd_accel_port 80 # Port of web server httpd_accel_single_host on # Forward uncached requests to single host httpd_accel_with_proxy on # httpd_accel_uses_host_header off
Here,
http_port 80 – The port 80 is the port that the squid server will be listening on.
httpd_accel_single_host on – This option informs squid that all requests should go to a single host.
httpd_accel_host 10.10.1.110 – This address should be changed to the address of the web server.
httpd_accel_uses_host_header off – This option tells squid not to add any proxy-style headers to any content that will be sent to the client.
httpd_accel_port 80 – This address is the port on which the remote web server is listening on.