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<p class="MsoNormal">Over the years there have been several discussions on this list on how to prevent users sshing into compute cluster nodes,<o:p></o:p></p>
<p class="MsoNormal">and so circumventing the batch system.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Reading the PBSPro manual, I just found the Mom parameter $restrict_user<o:p></o:p></p>
<p class="MsoNormal">Set this to true, and any (non-system) users who are not running a batch job on a system are killed after 10 seconds!<o:p></o:p></p>
<p class="MsoNormal">Tried it and it works.<o:p></o:p></p>
<p class="MsoNormal">I am unsure if there are equivalents in other batch systems.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Just goes to show<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="mso-list:Ignore">a)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>There is always something new to learn<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="mso-list:Ignore">b)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>RTFM<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:gray">Dr John Hearns</span></b><b><span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:gray"> | CFD Hardware Specialist |</span></b><span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:gray">
<b>McLaren Racing Limited</b></span><span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:navy"><br>
</span><span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:gray">McLaren Technology Centre, Chertsey Road, Woking, Surrey GU21 4YH, UK</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:gray"><br>
</span><b><span lang="DE" style="font-size:7.5pt;font-family:"Arial","sans-serif";color:red">T:
</span></b><span lang="DE" style="font-size:7.5pt;font-family:"Arial","sans-serif";color:gray"> +44 (0) 1483 262000</span><o:p></o:p></p>
<p class="MsoNormal"><b><span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:red">D: </span></b><span lang="DE" style="font-size:7.5pt;font-family:"Arial","sans-serif";color:gray">+44 (0) 1483 262352</span><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><o:p></o:p></span></p>
<p class="MsoNormal"><b><span lang="DE" style="font-size:7.5pt;font-family:"Arial","sans-serif";color:red">F:</span></b><span lang="DE" style="font-size:7.5pt;font-family:"Arial","sans-serif";color:gray"> +44 (0) 1483 261928 </span><span lang="DE" style="font-size:7.5pt;font-family:"Arial","sans-serif";color:navy"><br>
</span><b><span lang="DE" style="font-size:7.5pt;font-family:"Arial","sans-serif";color:red">E:</span></b><span lang="DE" style="font-size:7.5pt;font-family:"Arial","sans-serif";color:red"> </span><span lang="DE" style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#7F7F7F">john.hearns@mclaren.com</span><o:p></o:p></p>
<p class="MsoNormal"><b><span lang="DE" style="font-size:7.5pt;font-family:"Arial","sans-serif";color:red">W:
</span></b><a href="http://www.mclaren.com/" title="blocked::http://www.mclaren.com/"><span lang="DE" style="font-size:7.5pt;font-family:"Arial","sans-serif";color:gray">www.mclaren.com</span></a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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