<?xml version="1.0" ?> <!DOCTYPE article PUBLIC "-//KDE//DTD DocBook XML V4.5-Based Variant V1.1//EN" "dtd/kdedbx45.dtd" [ <!ENTITY % addindex "IGNORE"> <!ENTITY % English "INCLUDE" > <!-- change language only here --> ]> <article id="proxy" lang="&language;"> <title>Proxy</title> <articleinfo> <authorgroup> <author>&Krishna.Tateneni; &Krishna.Tateneni.mail;</author> <!-- TRANS:ROLES_OF_TRANSLATORS --> </authorgroup> <date>2016-11-10</date> <releaseinfo>Frameworks 5.29</releaseinfo> <keywordset> <keyword>KDE</keyword> <keyword>Systemsettings</keyword> <keyword>proxy</keyword> <keyword>proxies</keyword> </keywordset> </articleinfo> <sect1 id="proxies"> <title>Proxies</title> <sect2 id="proxies-intro"> <title>Introduction</title> <para>Proxies are programs running on a computer that acts a server on the network you are connected to (whether by modem or other means). These programs receive &HTTP; and &FTP; requests, retrieve the relevant files from the internet, and pass them on to the client computer that made the requests.</para> <para>When you have configured a proxy, &HTTP; and/or &FTP; requests are re-routed through the computer that is acting as a proxy server. However, you can also select specific hosts which should be contacted directly, rather than through the proxy server. If you are on a local network, for example, access to local hosts probably doesn't need to go through a proxy server.</para> <para>You should only need to configure a proxy server if your network administrator requires it (if you are a dial-up user, that would be your internet service provider or <acronym>ISP</acronym>). Otherwise, especially if you are feeling a bit confused about this proxy business, but everything seems to be fine with your internet connection, you don't need to change anything.</para> <para>Please note that using proxy servers is optional, but has the benefit or advantage of giving you faster access to data on the internet.</para> <para>If you are uncertain whether or not you need to use a proxy server to connect to the internet, please consult with your internet service provider's setup guide or your system administrator.</para> </sect2> <sect2 id="proxies-use"> <title>Use</title> <variablelist> <varlistentry> <term><guilabel>No Proxy</guilabel></term> <listitem> <para>Select this option if you do <emphasis>not</emphasis> want to use a proxy server and connect to the Internet directly.</para> </listitem> </varlistentry> </variablelist> <para>If you have decided to use a proxy, you have several methods to configure the settings for it.</para> <variablelist> <varlistentry> <term><guilabel>Detect proxy configuration automatically</guilabel></term> <listitem> <para>Select this option if you want the proxy setup configuration script file to be automatically detected and downloaded.</para> <para>This option only differs from the next choice in that it <emphasis>does not</emphasis> require you to supply the location of the configuration script file. Instead, it will be automatically downloaded using <quote>Web Proxy Auto-Discovery</quote> (<acronym>WPAD</acronym>) protocol.</para> </listitem> </varlistentry> <varlistentry> <term><guilabel>Use proxy auto configuration URL:</guilabel></term> <listitem> <para>Select this option if your proxy support is provided through a script file located at a specific address. You can then enter the address in the location text box, or use the <guiicon>folder</guiicon> icon to browse to it.</para> </listitem> </varlistentry> <varlistentry> <term><guilabel>Use system proxy configuration:</guilabel></term> <listitem> <para>Some systems are setup with $<envar>HTTP_PROXY</envar> to allow graphical as well as non-graphical applications to share the same proxy configuration information.</para> <para>If you know this applies to you, select this option and click on the <guibutton>Auto Detect</guibutton> button to provide the environment variable names used to set the address of the proxy server(s).</para> <!-- Exceptions fields are different for system proxy (envar) + manual proxy list of hosts/IPs? --> <para>In the <guilabel>Exceptions:</guilabel> field enter the environment variable, ⪚ $<envar>NO_PROXY</envar>, used to store the addresses of sites for which the proxy server should not be used.</para> <para>Use <guilabel>Show the value of the environment variables</guilabel> to show the value of an environment variable instead of its name. However it is not possible to edit the values of environment variables in this module.</para> <!-- How to enable Auto Detect button? --> </listitem> </varlistentry> <varlistentry> <term><guilabel>Use manually specified proxy configuration:</guilabel></term> <listitem> <para>The complete addressing information for the proxy includes both the Internet address and a port number. You should enter these into the relevant text boxes. Check <guilabel>Use this proxy server for all protocols</guilabel> to copy the addresses and port of the &HTTP; proxy server into all other proxy fields, in order to help save some typing.</para> <variablelist> <varlistentry> <term><guilabel>Exceptions:</guilabel></term> <listitem> <para>Enter a comma separated list of hostnames or ip addresses that should be excluded from using the above proxy settings. If you want to exclude all hosts for a given domain, then simply enter the domain name preceded by a dot. For example, to exclude all hostnames for kde.org, enter <userinput>.kde.org</userinput>. Wildcard characters such as <userinput>*</userinput> or <userinput>?</userinput> are not supported and will have no effect. Additionally, you can also enter IP addresses, ⪚ 127.0.0.1 and IP addresses with a subnet, ⪚ 192.168.0.1/24.</para> </listitem> </varlistentry> </variablelist> <para>You can also choose <guilabel>Use proxy settings only for addresses in the Exceptions list</guilabel>.</para> <para>Check this box to reverse the use of the exception list, &ie; the proxy servers will only be used when the requested &URL; matches one of the addresses listed here.</para> <para>This feature is useful if all you need is a proxy to access a few specific sites, for example, an internal intranet. If you have more complex requirements you might want to use a configuration script.</para> </listitem> </varlistentry> </variablelist> </sect2> </sect1> </article>
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