Disabling telnet/rlogin/tn3270 URLs

<title>Disabling Telnet URLs</title>

<h1>Disabling telnet/rlogin/tn3270 URLs</h1>

It is possible to disable Mosaic processing of all telnet, rlogin, or
tn3270 URLs. This is a temporary fix until Mosaic 2.3 is available
with secure telnet/rlogin/tn3270 URLs.
<p>

There are three environment variables which if set to the value
<code>none</code> prior to startup of Mosaic will disable Mosaic
processing of the URLs that are vulnerable. The environment variable names
depend on the version of Mosaic for X that you
are using. (You can find out which version of Mosaic you have by
selecting the <i>On Version</i> item on the Mosaic <i>Help</i>
pull-down menu.)

<pre>
     Version 2.2             2.1 and earlier
     -----------             ----------------
     telnet_proxy            WWW_telnet_GATEWAY
     tn3270_proxy            WWW_tn3270_GATEWAY
     rlogin_proxy            WWW_rlogin_GATEWAY
     
Example csh commands for Mosaic 2.2 and earlier
-----------------------------------------------
     setenv telnet_proxy none
     setenv tn3270_proxy none
     setenv rlogin_proxy none
     
Example ksh commands for Mosaic 2.2 and earlier
-----------------------------------------------
     export telnet_proxy=none
     export tn3270_proxy=none
     export rlogin_proxy=none
</pre>