(wget) Proxies

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 Proxies
 =======
 
    "Proxies" are special-purpose HTTP servers designed to transfer data
 from remote servers to local clients.  One typical use of proxies is
 lightening network load for users behind a slow connection.  This is
 achieved by channeling all HTTP and FTP requests through the proxy
 which caches the transferred data.  When a cached resource is requested
 again, proxy will return the data from cache.  Another use for proxies
 is for companies that separate (for security reasons) their internal
 networks from the rest of Internet.  In order to obtain information
 from the Web, their users connect and retrieve remote data using an
 authorized proxy.
 
    Wget supports proxies for both HTTP and FTP retrievals.  The
 standard way to specify proxy location, which Wget recognizes, is using
 the following environment variables:
 
 `http_proxy'
      This variable should contain the URL of the proxy for HTTP
      connections.
 
 `ftp_proxy'
      This variable should contain the URL of the proxy for FTP
      connections.  It is quite common that HTTP_PROXY and FTP_PROXY are
      set to the same URL.
 
 `no_proxy'
      This variable should contain a comma-separated list of domain
      extensions proxy should _not_ be used for.  For instance, if the
      value of `no_proxy' is `.mit.edu', proxy will not be used to
      retrieve documents from MIT.
 
    In addition to the environment variables, proxy location and settings
 may be specified from within Wget itself.
 
 `-Y on/off'
 `--proxy=on/off'
 `proxy = on/off'
      This option may be used to turn the proxy support on or off.  Proxy
      support is on by default, provided that the appropriate environment
      variables are set.
 
 `http_proxy = URL'
 `ftp_proxy = URL'
 `no_proxy = STRING'
      These startup file variables allow you to override the proxy
      settings specified by the environment.
 
    Some proxy servers require authorization to enable you to use them.
 The authorization consists of "username" and "password", which must be
 sent by Wget.  As with HTTP authorization, several authentication
 schemes exist.  For proxy authorization only the `Basic' authentication
 scheme is currently implemented.
 
    You may specify your username and password either through the proxy
 URL or through the command-line options.  Assuming that the company's
 proxy is located at `proxy.company.com' at port 8001, a proxy URL
 location containing authorization data might look like this:
 
      http://hniksic:mypassword@proxy.company.com:8001/
 
    Alternatively, you may use the `proxy-user' and `proxy-password'
 options, and the equivalent `.wgetrc' settings `proxy_user' and
 `proxy_passwd' to set the proxy username and password.
 

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