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<p class="MsoNormal">Rene,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We had a similar issue with an Ellucian application.<o:p></o:p></p>
<p class="MsoNormal">Which unexplained IdP reboots seemed to clear items up but wasn’t the cause it was just coincidental it worked.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Our issue was an open file limit on our linux application side (Ellucian banner, not IdP).
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="color:black">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="color:black">Taylor<o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><b><span style="font-family:"Tahoma",sans-serif;color:black"> </span></b><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><b><span style="font-family:"Tahoma",sans-serif;color:black">--------------------------------</span></b><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><b><span style="font-family:"Tahoma",sans-serif;color:black">Taylor Hucker</span></b><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black"><br>
Applications System Administrator<br>
Texas A&M University - Corpus Christi<br>
</span><span style="color:black;background:white"><a href="mailto:Taylor.Hucker@tamucc.edu"><span style="color:#0563C1">Taylor.Hucker@tamucc.edu</span></a></span><span style="color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="font-size:12.0pt;color:black">From:
</span></b><span style="font-size:12.0pt;color:black">users <users-bounces@shibboleth.net> on behalf of Rene Paquin <rpaquin@wlu.ca><br>
<b>Date: </b>Friday, March 26, 2021 at 1:43 PM<br>
<b>To: </b>Shib Users <users@shibboleth.net><br>
<b>Subject: </b>CAS authentication issue<o:p></o:p></span></p>
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<p class="MsoNormal">Since moving to IDP 4.01 we are having some CAS authentication issues. It seems quite random, maybe 2 -3 times a week and a reboot of one or sometimes both IDP servers resolves the issue until it happens again. Here is what is happening<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<ol style="margin-top:0in" start="1" type="1">
<li class="MsoNormal" style="mso-list:l0 level1 lfo3"><span style="mso-fareast-language:EN-CA">User browser accesses CAS application</span><o:p></o:p></li><li class="MsoNormal" style="mso-list:l0 level1 lfo3"><span style="mso-fareast-language:EN-CA">Browser is redirected to IDP login page</span><o:p></o:p></li><li class="MsoNormal" style="mso-list:l0 level1 lfo3"><span style="mso-fareast-language:EN-CA">User enters credential (browser) authenticated at IDP</span><o:p></o:p></li><li class="MsoNormal" style="mso-list:l0 level1 lfo3"><span style="mso-fareast-language:EN-CA">IDP sent a CAS ticket back to the browser, and redirect the browser back to CAS application</span><o:p></o:p></li><li class="MsoNormal" style="mso-list:l0 level1 lfo3"><span style="mso-fareast-language:EN-CA">Browser presents the CAS ticket number to CAS application</span><o:p></o:p></li><li class="MsoNormal" style="mso-list:l0 level1 lfo3"><span style="mso-fareast-language:EN-CA">CAS application server sends ticket validation request to IDP server</span><o:p></o:p></li><li class="MsoNormal" style="mso-list:l0 level1 lfo3"><span style="mso-fareast-language:EN-CA">IDP validates the ticket, and return to the CAS application server a SOAP wrapped SAML response.
</span><o:p></o:p></li><li class="MsoNormal" style="mso-list:l0 level1 lfo3"><span style="mso-fareast-language:EN-CA">User only sees a blank page in the browser</span><o:p></o:p></li></ol>
<p class="MsoNormal"><span style="mso-fareast-language:EN-CA"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-CA">When it’s working, between step 7 and 8, it should be the CAS application servers received SOAP message and continue to display the resources to user in the browser.
</span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Any ideas? This is really puzzling us.<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Thanks,<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:12.0pt;font-family:"Times New Roman",serif;mso-fareast-language:EN-CA">********************************<br>
Rene Paquin - Systems Administrator <br>
Wilfrid Laurier University<br>
Waterloo, Ontario<br>
(519)884-0710 x3795<br>
<a href="mailto:rpaquin@wlu.ca" target="_blank">rpaquin@wlu.ca</a></span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
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