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<p class="msipheader8eb7d5eb" align="Left" style="margin:0"><span style="font-size:10.0pt;font-family:Calibri;color:#737373">Internal Use - Confidential</span></p>
<br>
<div class="WordSection1">
<p class="MsoNormal">Hey Ratan, Richard,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The issue that we ran into when using openLDAP was a small but key bit of configuration that I personally did not see on the web – the gidNumber property of a posix user/group.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The below <span style="color:#2E75B6;mso-style-textfill-fill-color:#2E75B6;mso-style-textfill-fill-alpha:100.0%">
documentation/notes (currently just for openLDAP) </span>I have from my investigation would have helped us get to the root of our problem much quicker.
<o:p></o:p></p>
<p class="MsoNormal">It might be beneficial to others to add this or something similar enough that clarifies the gidNumber requirements into the Phosphor User Manager README. If not, would there be a better place?<o:p></o:p></p>
<p class="MsoNormal">I could adjust/edit or I can leave it to you. <span style="font-family:"Segoe UI Emoji",sans-serif">
😊</span><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">Trevor Cockrell<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="color:#2E75B6;mso-style-textfill-fill-color:#2E75B6;mso-style-textfill-fill-alpha:100.0%">User ‘John’ was created with the ldif below for an ldap server ‘example.com’:</span><span style="color:#2E75B6;mso-style-textfill-fill-color:#2E75B6;mso-style-textfill-fill-alpha:100.0%"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:10.0pt;font-family:Consolas;color:#2E75B6;mso-style-textfill-fill-color:#2E75B6;mso-style-textfill-fill-alpha:100.0%">dn: uid=John,dc=example,dc=com<br>
objectClass: top<br>
objectClass: account<br>
objectClass: posixAccount<br>
objectClass: shadowAccount<br>
cn: John<br>
uid: John<br>
uidNumber: 1024<br>
<b>gidNumber</b>: 100<br>
homeDirectory: /home/John<br>
loginShell: /bin/bash<br>
gecos: John<br>
userPassword: {crypt}x<br>
shadowLastChange: -1<br>
shadowMax: -1<br>
shadowWarning: -1<br>
<br>
<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="color:#2E75B6;mso-style-textfill-fill-color:#2E75B6;mso-style-textfill-fill-alpha:100.0%">In order for John to access any WebUI or redfish implementation, he must then be organized into a posix group
with gidNumber 1004. This is because OpenBMC performs a group check for redfish on any user attempting redfish or WebUI interaction methods. The posix group was created with the following ldif:<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:10.0pt;font-family:Consolas;color:#2E75B6;mso-style-textfill-fill-color:#2E75B6;mso-style-textfill-fill-alpha:100.0%">dn: cn=redfish,dc=example,dc=com<br>
cn: redfish<br>
objectClass: posixGroup<br>
objectClass: top<br>
<b>gidNumber</b>: 1004<br>
<b>memberUid</b>: John <br>
</span><span style="font-family:Consolas;color:#2E75B6;mso-style-textfill-fill-color:#2E75B6;mso-style-textfill-fill-alpha:100.0%"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="color:#2E75B6;mso-style-textfill-fill-color:#2E75B6;mso-style-textfill-fill-alpha:100.0%">The name of the posix group does not matter – only the gidNumber which is set to 1004, locally ‘redfish’ on
the OpenBMC. Field </span><span style="color:#2E75B6;mso-style-textfill-fill-color:#2E75B6;mso-style-textfill-fill-alpha:100.0%">memberUid</span><span style="color:#2E75B6;mso-style-textfill-fill-color:#2E75B6;mso-style-textfill-fill-alpha:100.0%"> maps John
into the redfish group, allowing him access to both the WebUI and redfish methods of interacting with OpenBMC.
<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="color:#2E75B6;mso-style-textfill-fill-color:#2E75B6;mso-style-textfill-fill-alpha:100.0%">If desired, John can also be placed in posix-group ‘priv-admin’ with gidNumber 1000, granting him SSH access
to the system. Privilege mapping does not affect the ability of a user in group 1000 to access the OpenBMC via SSH.<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="color:#2E75B6;mso-style-textfill-fill-color:#2E75B6;mso-style-textfill-fill-alpha:100.0%">With a user placed in a group, a privilege mapping must then be assigned. The above gidNumber 100 relates to
group ‘users’ on the local OpenBMC machine. When the mapping is assigned, any users within the mapped gidNumber will have the privilege level that has been mapped to their group. For example, if Jane were to be assigned gidNumber 100 she would have the same
privileges as John. The privilege mapping must have the same name as the group referenced by the gidNumber. In this case, the role mapping must be explicitly for ‘users’. If there is no mapping assigned, connection via redfish is refused while the WebUI allows
login with no interaction. <o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="color:#2E75B6;mso-style-textfill-fill-color:#2E75B6;mso-style-textfill-fill-alpha:100.0%"><o:p> </o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b>From:</b> Ratan Gupta <ratagupt@linux.vnet.ibm.com> <br>
<b>Sent:</b> Monday, September 21, 2020 9:29 AM<br>
<b>To:</b> Thomaiyar, Richard Marian; Gerhart, Donnie; openbmc@lists.ozlabs.org; gkeishin@in.ibm.com<br>
<b>Cc:</b> Mugunda, Chandra; Giles, Joshua; Cockrell, Trevor<br>
<b>Subject:</b> Re: OpenBMC LDAP server configuration assistance<o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p><span style="color:#CE1126">[EXTERNAL EMAIL] <o:p></o:p></span></p>
</div>
<p>Hi Donnie,<o:p></o:p></p>
<p>We didn't create the cheatsheet for ldap server configuration, we thought the enough documentation is there on the net to configure the ldap server.<o:p></o:p></p>
<p>But it is good to have this documentation, Are you doing it for openLDAP or the Active Directory also?<o:p></o:p></p>
<p>I thought George & team was having this when I was working with him.<o:p></o:p></p>
<p>Ratan<o:p></o:p></p>
<div>
<p class="MsoNormal">On 9/21/20 10:01 AM, Thomaiyar, Richard Marian wrote:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"><span class="pfptpreheader1"><span style="font-size:1.0pt;color:white">Hi Donnie, Yes, Please go ahead and create Cheatsheet for LDAP configuration....
</span></span><o:p></o:p></p>
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<p class="MsoNormal"><span class="pfpttitle"><b><span style="font-size:13.5pt;font-family:"Helvetica",sans-serif">This Message Is From an External Sender</span></b></span>
<o:p></o:p></p>
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<td style="padding:0in 0in 0in 0in">
<p class="MsoNormal"><span class="pfptsubtitle"><span style="font-size:10.0pt;font-family:"Helvetica",sans-serif">This message came from outside your organization.</span></span>
<o:p></o:p></p>
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<p>Hi Donnie, <o:p></o:p></p>
<p>Yes, Please go ahead and create Cheatsheet for LDAP configuration.<o:p></o:p></p>
<p>Regards,<o:p></o:p></p>
<p>Richard<o:p></o:p></p>
<div>
<p class="MsoNormal">On 9/12/2020 12:44 AM, Gerhart, Donnie wrote:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal">Hey Richard/Folks,<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Thanks for reaching out. We really appreciate it.<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Per usual, shortly after we hit send, we found a GID anomaly that once corrected everything OpenBMC LDAP connected up and logged in nicely.<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">To keep others from spinning in such an anomaly we’d be more than happy to post (ourselves or through you) a simple Ldap diff (LDIF) file containing a small working joe and jane LDAP server config. The two places we thought such an example
might valuable are phosphor user manager arch documentation and/or the LDAP test in openbmc-test-automation but we are happy to defer to your guidance regarding same. Let us know your thoughts and we can post or provide the applicable file straight away.
<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Thanks again!<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Best,<o:p></o:p></p>
<p class="MsoNormal">Donnie<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b>From:</b> Thomaiyar, Richard Marian <a href="mailto:richard.marian.thomaiyar@linux.intel.com">
<richard.marian.thomaiyar@linux.intel.com></a> <br>
<b>Sent:</b> Thursday, September 10, 2020 8:53 AM<br>
<b>To:</b> Gerhart, Donnie; <a href="mailto:openbmc@lists.ozlabs.org">openbmc@lists.ozlabs.org</a>;
<a href="mailto:ratagupt@linux.vnet.ibm.com">ratagupt@linux.vnet.ibm.com</a>; <a href="mailto:gkeishin@in.ibm.com">
gkeishin@in.ibm.com</a><br>
<b>Cc:</b> Mugunda, Chandra; Giles, Joshua; Cockrell, Trevor<br>
<b>Subject:</b> Re: OpenBMC LDAP server configuration assistance<o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"> <o:p></o:p></p>
<div>
<p><span style="color:#CE1126">[EXTERNAL EMAIL] </span><o:p></o:p></p>
</div>
<p class="MsoNormal">Hi Donnie, <o:p></o:p></p>
<p>Didn't tested it in latest tree, but you already cross verified this right -->
<a href="https://github.com/openbmc/openbmc-test-automation/blob/master/redfish/account_service/test_ldap_configuration.robot">
https://github.com/openbmc/openbmc-test-automation/blob/master/redfish/account_service/test_ldap_configuration.robot</a><o:p></o:p></p>
<p>++ Ratan & George.<o:p></o:p></p>
<p>Regards,<o:p></o:p></p>
<p>Richard<o:p></o:p></p>
<div>
<p class="MsoNormal">On 9/9/2020 10:02 PM, Gerhart, Donnie wrote:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal">Hello OpenBMC Community\SMEs,<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">We are investigating LDAP functionality on the 2.8 ‘top of tree’ build; however, we are having some issues I believe you can help with straight away. Some of the many real failures we’ve encountered are:<o:p></o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo3">Bricked system due to locking out all users<o:p></o:p></li></ul>
</blockquote>
<p class="MsoNormal"><Richard> You meant to say even `root` user is locked out is OpenBMC repo master or made more changes. By default user lock out is disabled, and still won't lock root user to avoid DOS attack.
<o:p></o:p></p>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo3">Ladap_result() failed: Can’t contact LDAP server<o:p></o:p></li></ul>
<ul style="margin-top:0in" type="disc">
<ul style="margin-top:0in" type="circle">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level2 lfo3">Believe we’ve fixed this one<o:p></o:p></li></ul>
</ul>
</blockquote>
<p class="MsoNormal"><Richard> Hope this as LDAP configuration issue you faced, and not related to OpenBMC code as such.<br>
<br>
<br>
<o:p></o:p></p>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo3">Logins are restricted to the group priv-admin of but user ‘testuser’ is not a member<o:p></o:p></li></ul>
</blockquote>
<p><Richard>: Is this failure due to SSH login. Because SSH won't make use of ldap privilege mapping. You may need to change
<a href="https://github.com/openbmc/meta-phosphor/blob/master/recipes-core/dropbear/dropbear/dropbear.default">
https://github.com/openbmc/meta-phosphor/blob/master/recipes-core/dropbear/dropbear/dropbear.default</a> if needs LDAP testing in SSH.<o:p></o:p></p>
<p>Have you tried bmcweb LDAP login ? Whether you are able to succeed in that ?<o:p></o:p></p>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo3">Pam_authenticate() failed, rc=7, Authentication failure<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo3">Bad PAM password attempt for ‘testuser’ from: <LDAP server IP><o:p></o:p></li></ul>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Some of these issues we’ve worked through; however, some are still dogging us. To that end, can someone possibly list\post a basic LDAP server LDIF file with a single user, privilege role and group mapping that you’ve successfully used
with OpenBMC? We assume we are stuck on some trivial LDAP server topology anomaly that is completely escaping us at the moment.<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">As an fyi we have looked at:<o:p></o:p></p>
<ol style="margin-top:0in" start="1" type="1">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level1 lfo10">Gone through everything obviously ‘ldap’ in the mailing lists:
<a href="https://lists.ozlabs.org/pipermail/openbmc/">https://lists.ozlabs.org/pipermail/openbmc/</a><o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level1 lfo10">Looked at OpenBMC learning series:
<a href="https://github.com/openbmc/openbmc/wiki/Presentations">https://github.com/openbmc/openbmc/wiki/Presentations</a><o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level1 lfo10">Gone through the documents here:
<a href="https://github.com/openbmc/docs/blob/master/architecture/user-management.md">
https://github.com/openbmc/docs/blob/master/architecture/user-management.md</a><o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level1 lfo10">Looked at ldap tests and server:
<a href="https://github.com/openbmc/openbmc-test-automation">https://github.com/openbmc/openbmc-test-automation</a><o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level1 lfo10">Spent more time tweaking Linux files and creating ldap server configs that I care to admit
<span style="font-family:"Segoe UI Emoji",sans-serif">😊</span><o:p></o:p></li></ol>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">BIG thanks in advance!<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Best,<o:p></o:p></p>
<p class="MsoNormal">Donnie<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
</blockquote>
</blockquote>
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