Settings -- Network and Internet -- Proxy
  Automatically detect: Off

Under Manual proxy setup
  Use proxy server: On
  Address: www-cache.fh-lausitz.de
  Port: 3128

<Save>

In your browser, select ‘Use system proxy settings’.

System settings -- Network
Select the network connection you are using:
‘Ethernet’ (if the Mac is connected directly with a LAN cable)   or
‘WLAN’ (if you are using your own WLAN router)
  <More options...>
    <Proxies>
Check the boxes next to HTTP, HTTPS, FTP
and enter the following for each protocol you have selected (HTTP, HTTPS, FTP):
  Web proxy server:   www-cache.fh-lausitz.de : 3128
  Check ‘Require password for proxy server’
  Username and password of the BTU account
<OK>
<Apply>

This method may also work with other UNIX browsers such as Chimera. It has been tested with Lynx and X Mosaic. To do this, a number of environment variables must point to the proxy server.

In ksh and bash, this is done as follows:

export http_proxy=http://www-cache.fh-lausitz.de:3128/
export ftp_proxy=http://www-cache.fh-lausitz.de:3128/
export gopher_proxy=http://www-cache.fh-lausitz.de:3128/
export wais_proxy=http://www-cache.fh-lausitz.de:3128/

In all cases, it is essential to pay attention to the number and arrangement of the ‘/’ characters!