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<H2 ALIGN=center>Remote Access to Athena</H2>
<BR>

<hr>

Note: The information below is intended as a quick reference guide only.
Computer security is taken very seriously at MIT, and it is important
that you use secure programs to avoid compromising your own account,
machines you access remotely, and MITnet as a whole -- in particular,
you should be aware that regular telnet and FTP clients transmit data
(including your password) across the network without any protection.
Please see our pages on secure methods of <a href="login.html">remote
login</a> and <a href="filetransfer.html">file transfer</a> before using the
information below.
<hr>


<h2> If you are connecting via:</h2>

<ul>
  <li><strong> direct network connection <a
       href="http://web.mit.edu/is/help/network/">(MITnet)</a></strong>
  <li><strong> modem with MIT's</strong> <a
       href="http://web.mit.edu/is/help/tether/">Tether</a>
       <strong>service</strong>   
  <li><strong> modem with outside ISP (Internet Service Provider)</strong>
</ul>

<p>
The following addresses can be used for general remote access to Athena
through a network connection.  For information on supported programs for
connecting securely, see the ACS Notes on <a href="login.html">remote
login</a> and <a href="filetransfer.html">file transfer</a>.


<pre>
        athena.dialup.mit.edu           [regular access, no X]
        express.dialup.mit.edu          [short sessions, no X]
        athena-x.dialup.mit.edu         [for X applications]

</pre>
<p>
The addresses above connect you to a pool of machines known for historical
reasons as the Athena "Dialups".  There are three varieties in this pool:
regular, express, and x-enabled.

The "express" dialups are designed to give better performance to 
users who only need to log in briefly (e.g., to read or send mail).
Users are limited to 15 minutes of connect time when there are more than
10 users logged on the same machine; for more information, see the OLC
stock answer on <a
href="http://web.mit.edu/answers/dialup/dialup_express.html">Dialup
Express</a> 

The athena-x dialups are the only dialups on which use of X windows is
enabled; this keeps the load down on the regular and express dialups for
general use.  

<h3><a name="xwindows"> Running X Windows applications remotely </a></h3>

As noted above, remote use of X Windows is not enabled on the regular
and express dialups.  If you need to run X applications remotely, log
into athena-x.dialup.mit.edu or a private workstation, and follow the
instructions in the OLC stock answer on <a
href="http://web.mit.edu/answers/dialup/networks_rlogin.html">running X
Windows remotely</a>.



<h3><a name="coursework"> Alternatives for course staff </a></h3>

ACS maintains a few remote-access Athena workstations for the use of faculty
and TAs doing course-related work; see <a
href="http://web.mit.edu/acs/www/chordform.html">ACS Course Work
systems</a> for more information. 

<h2><a name="dialin"> If you are connecting via: </a></h2>

<ul>
  <li><strong> modem (without an Internet Service Provider)</strong>
</ul>

If you are not using Tether or an outside ISP, you can access Athena
with a modem or ISDN phone as described in the the <a
href="http://web.mit.edu/olh/Dialup/">Dialing into Athena (AC-15)</a>
publication.  There is also an OLC stock answer on <a
href="http://web.mit.edu/answers/dialup/dialup_isdn.html">dialing into
Athena from an ISDN phone</a>.

<h2><a name="help"> For help with... </a></h2>

<table cellpadding=3>

<tr>
<td valign=top><strong>connecting to Athena,<br>general Athena questions</strong></td>
<td><a href ="http://web.mit.edu/consult/www/">Athena Consultants</a><br>phone: x3-4435<br>from Athena, type: olc</td>
</tr>

<tr>
<td valign=top><strong>Tether/MITnet help,<br>Mac and PC software</strong></td>
<td><a href ="http://web.mit.edu/helpdesk/">Computing Help
Desk</a><br>Mac: x3-1101, <a href="mailto:mac-help@@mit.edu">mac-help@@mit.edu</a><br>PC:
x3-1102, <a href="mailto:pc-help@@mit.edu">pc-help@@mit.edu</a></td>
</tr>

<tr>
<td valign=top><a href ="http://web.mit.edu/acs/www/chordform.html">ACS
course work systems</a>,<br><strong>instructional computing</strong></td>
<td><a href ="http://web.mit.edu/acs/www/f_l.html">Faculty
Liaisons</a><br>x3-0115, <a href="mailto:f_l@@mit.edu">f_l@@mit.edu</a></td>
</tr>

</table>

<hr>
<center>
<strong>related ACS notes: </strong><a href="login.html">Remote Login Guide</a> |
<a href="filetransfer.html">File Transfer Guide</a> | <a
href="ssh.html">SSH Overview</a> 
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