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<p>One way for open-source SAML in Zimbra is using Zimbra pre-auth,
combined with SimpleSAMLphp, using their _autoload.php, this means
your pre-auth php implementation needs to be on the IDP:</p>
<pre><?php
require_once('/var/www/html/simplesamlphp/lib/_autoload.php');
$as = new SimpleSAML_Auth_Simple('your-phpsimplesaml-configured-auth-source-here');
$as->requireAuth();
$attributes = $as->getAttributes();
//do a print_r attributes in case you want to add more logic for groups and access rights,
//or in case you just want ANY user to be able to log-in to Zimbra that is logged into SAML,
//just check if $attributes is set, like so:
if(!$attributes)
{
die("Access denied");
}
else
{
// do zimbra pre-auth here
//<a class="moz-txt-link-freetext" href="https://wiki.zimbra.com/wiki/Preaut">https://wiki.zimbra.com/wiki/Preaut</a>
}</pre>
Check the logs to see if you are receiving the originating IP, if I
remember correctly, you have to use the SOAP version of preauth if
you do not get the originating IP in the logs.
<p><br>
</p>
<p>Regards, Barry<br>
</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 6/19/21 8:28 PM, Randy Leiker wrote:<br>
</div>
<blockquote type="cite"
cite="mid:281769300.781891.1624127320247.JavaMail.zimbra@skywaynetworks.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div style="font-family: arial, helvetica, sans-serif; font-size:
12pt; color: #000000">
<div>Hi Tuan,<br>
</div>
<div><br data-mce-bogus="1">
</div>
<div>I appreciate your feedback and am glad to hear the weekly
call summaries are helpful. On the most recent call, Mark
Stone was asking about a SAML integration in Zimbra for one of
his clients. I know that Mark is on the Zeta Alliance mailing
list, so I will leave it up to him to reach out to you
directly, if he would like, to do some code sharing. <br
data-mce-bogus="1">
</div>
<div><br data-mce-bogus="1">
</div>
<div>If you have integrations for Zimbra you would be open to
sharing with the community, you could also upload them to
Github as an open source project, or add them to the
zimbra.org site, then send a note to this mailing list to let
everyone know of their availability.<br data-mce-bogus="1">
</div>
<div><br data-mce-bogus="1">
</div>
<div data-marker="__SIG_PRE__">
<div>
<div>
<div><span style="color:rgb( 255 , 102 , 0
);font-weight:bold"><br>
Randy Leiker (</span><span style="font-weight:bold"> <span
style="color:rgb( 51 , 51 , 255
);background-color:rgb( 255 , 255 , 255 )"><a class="moz-txt-link-abbreviated" href="mailto:randy@skywaynetworks.com">randy@skywaynetworks.com</a></span>
<span style="color:rgb( 255 , 102 , 0 )">)</span></span><br>
<span style="color:rgb( 0 , 0 , 153 )">Skyway Networks,
LLC</span><br>
<br>
</div>
</div>
</div>
</div>
<div><br>
</div>
<hr id="zwchr" data-marker="__DIVIDER__">
<div data-marker="__HEADERS__"><b>From: </b><a class="moz-txt-link-abbreviated" href="mailto:tuanta@iwayvietnam.com">tuanta@iwayvietnam.com</a><br>
<b>To: </b>"users" <a class="moz-txt-link-rfc2396E" href="mailto:users@lists.zetalliance.org"><users@lists.zetalliance.org></a><br>
<b>Sent: </b>Friday, June 18, 2021 1:27:26 AM<br>
<b>Subject: </b>Re: [Users] June 15, 2021 Zeta Alliance
Conference Call Summary<br>
</div>
<div><br>
</div>
<div data-marker="__QUOTED_TEXT__">
<div style="font-family:'arial' , 'helvetica' ,
sans-serif;font-size:12pt;color:#000000">
<div>Hi Randy Leiker et al,<br>
</div>
<br>
<div>Thank you for your continual efforts. I often read your
weekly summary carefully :)<br>
</div>
<div>(just can not join the live meeting since it about 1-2
AM here)<br>
</div>
<br>
<div>As a Zextras partner and providing Zimbra professional
services in Vietnam for over ten years, we have many
clients and some of them also use SSO with SAML.<br>
</div>
<div>We have already developed a module for Zimbra open
source (support Zimbra 8.8 as well) to integrate to SSO
with SAML, CAS, OIDC, etc.</div>
<div>And as many other contributions on OpenPGP & other
modules, we are willing to share this to all of you.</div>
<div>Please tell me if I can do anything.<br>
</div>
<br>
<div>Thanks again and see you around.<br>
</div>
<br>
<div>
<div><span style="font-size:12pt">-----<br>
</span></div>
<div><span style="font-size:12pt">Rgds,</span><br>
<span style="font-size:12pt">Tuan</span></div>
</div>
<br>
<hr id="zwchr">
<div><b>From: </b>"Randy Leiker"
<a class="moz-txt-link-rfc2396E" href="mailto:randy@skywaynetworks.com"><randy@skywaynetworks.com></a><br>
<b>To: </b>"users" <a class="moz-txt-link-rfc2396E" href="mailto:users@lists.zetalliance.org"><users@lists.zetalliance.org></a><br>
<b>Sent: </b>Friday, June 18, 2021 12:27:54 PM<br>
<b>Subject: </b>[Users] June 15, 2021 Zeta Alliance
Conference Call Summary<br>
</div>
<br>
<div>
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<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>Hello
Zeta Alliance
Community,<br>
<br>
Here is a
summary of
this week’s
conference
call. A few
brief
reminders:<br>
</div>
<ul>
<li>Conference
calls are
every <span
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id="OBJ_PREFIX_DWT3275_com_zimbra_date"><span
class="Object"
id="OBJ_PREFIX_DWT3759_com_zimbra_date"><span class="Object"
id="OBJ_PREFIX_DWT3771_com_zimbra_date"><span
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id="OBJ_PREFIX_DWT4726_com_zimbra_date"><span class="Object"
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id="OBJ_PREFIX_DWT8014_com_zimbra_date"><span
class="Object"
id="OBJ_PREFIX_DWT8035_com_zimbra_date">Tuesday</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span>
and open to
all using
either the
FreeConferenceCall.com
VoIP app or
via a dial-in
number: <span
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id="OBJ_PREFIX_DWT8036_com_zimbra_url"><a
href="https://www.freeconferencecall.com/wall/zetalliance"
rel="nofollow
noopener
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noreferrer"
target="_blank"
moz-do-not-send="true">https://www.freeconferencecall.com/wall/zetalliance</a></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span><br>
</li>
<li>Each
week’s call
agenda can be
found at: <span
style="color:#000080"><span style="font-family:'arial' , sans-serif"><span
style="font-size:medium"><span lang="zxx"><u><span class="Object"
id="OBJ_PREFIX_DWT3272_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT3287_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT184_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT197_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT2480_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT2495_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT1409_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT1423_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT456_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT470_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT6924_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT6934_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT446_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT460_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT6645_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT6669_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT4042_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT4058_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT3260_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT3277_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT3761_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT3773_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT4728_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT4741_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT5421_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT5435_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT5519_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT5537_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT8016_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT8037_com_zimbra_url"><a
href="https://drive.google.com/drive/folders/1xDyBJFjnfZYxuXJHiDzsXjjMuGGtIl7J"
rel="noopener
nofollow
noopener
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target="_blank"
moz-do-not-send="true">https://drive.google.com/drive/folders/1xDyBJFjnfZYxuXJHiDzsXjjMuGGtIl7J</a></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></u></span></span></span></span><br>
</li>
<li>A copy of
each week’s
summary is
also posted to
the Zimbra
Forums:<br>
<span
class="Object"></span>
<ul>
<li><span
class="Object">All
Prior Months:
<span
class="Object"
id="OBJ_PREFIX_DWT829_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT847_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT1360_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT1382_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT1149_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT1162_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT1358_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT1371_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT1484_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT1499_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT2671_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT2682_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT1784_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT1810_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT6183_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT6207_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT872_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT887_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT2777_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT2793_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT2401_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT2416_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT2513_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT2536_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT2634_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT2649_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT6021_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT6040_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT4434_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT4448_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT2543_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT2560_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT97_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT113_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT1185_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT1202_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT3273_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT3288_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT185_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT198_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT2481_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT2496_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT1410_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT1424_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT457_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT471_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT6925_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT6935_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT447_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT461_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT6646_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT6670_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT4043_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT4059_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT3261_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT3278_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT3762_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT3774_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT4729_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT4742_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT5422_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT5436_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT5520_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT5538_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT8017_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT8038_com_zimbra_url"><a
href="https://forums.zimbra.org/viewforum.php?f=9" rel="nofollow
noopener
noreferrer
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target="_blank"
moz-do-not-send="true">https://forums.zimbra.org/viewforum.php?f=9</a></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span><br>
</span></li>
<li><span
style="font-family:'arial'
, sans-serif"><span
style="font-size:medium"><span lang="zxx"><span class="Object"><span
class="Object"
id="OBJ_PREFIX_DWT1413_com_zimbra_date"><span class="Object"
id="OBJ_PREFIX_DWT1427_com_zimbra_date"><span
class="Object"
id="OBJ_PREFIX_DWT460_com_zimbra_date"><span class="Object"
id="OBJ_PREFIX_DWT474_com_zimbra_date"><span
class="Object"
id="OBJ_PREFIX_DWT6928_com_zimbra_date"><span class="Object"
id="OBJ_PREFIX_DWT6938_com_zimbra_date"><span
class="Object"
id="OBJ_PREFIX_DWT450_com_zimbra_date"><span class="Object"
id="OBJ_PREFIX_DWT464_com_zimbra_date"><span
class="Object"
id="OBJ_PREFIX_DWT6649_com_zimbra_date"><span class="Object"
id="OBJ_PREFIX_DWT6673_com_zimbra_date"><span
class="Object"
id="OBJ_PREFIX_DWT4046_com_zimbra_date"><span class="Object"
id="OBJ_PREFIX_DWT4062_com_zimbra_date"><span
class="Object"
id="OBJ_PREFIX_DWT3264_com_zimbra_date"><span class="Object"
id="OBJ_PREFIX_DWT3281_com_zimbra_date"><span
class="Object"
id="OBJ_PREFIX_DWT3765_com_zimbra_date"><span class="Object"
id="OBJ_PREFIX_DWT3777_com_zimbra_date"><span
class="Object"
id="OBJ_PREFIX_DWT4732_com_zimbra_date"><span class="Object"
id="OBJ_PREFIX_DWT4745_com_zimbra_date"><span
class="Object"
id="OBJ_PREFIX_DWT5425_com_zimbra_date"><span class="Object"
id="OBJ_PREFIX_DWT5439_com_zimbra_date"><span
class="Object"
id="OBJ_PREFIX_DWT5521_com_zimbra_date"><span class="Object"
id="OBJ_PREFIX_DWT5539_com_zimbra_date"><span
class="Object"
id="OBJ_PREFIX_DWT8018_com_zimbra_date"><span class="Object"
id="OBJ_PREFIX_DWT8039_com_zimbra_date">May
2021</span></span></span></span></span></span></span></span></span></span></span></span>:
<span
class="Object"
id="OBJ_PREFIX_DWT3265_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT3282_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT3766_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT3778_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT4733_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT4746_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT5426_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT5440_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT5522_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT5540_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT8019_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT8040_com_zimbra_url"><a
href="https://forums.zimbra.org/viewtopic.php?f=9&t=69570"
rel="nofollow
noopener
noreferrer
nofollow
noopener
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target="_blank"
moz-do-not-send="true">https://forums.zimbra.org/viewtopic.php?f=9&t=69570</a></span></span></span></span></span></span></span></span></span></span></span></span>
</span></span></span></span></span></span></span></span></span></span></span></span><br>
</span></span></span></span></li>
<li><span
style="font-family:'arial'
, sans-serif"><span
style="font-size:medium"><span lang="zxx"><span class="Object"><span
class="Object"
id="OBJ_PREFIX_DWT5523_com_zimbra_date"><span class="Object"
id="OBJ_PREFIX_DWT5541_com_zimbra_date"><span
class="Object"
id="OBJ_PREFIX_DWT8020_com_zimbra_date"><span class="Object"
id="OBJ_PREFIX_DWT8041_com_zimbra_date">June
2021</span></span></span></span>:</span></span></span></span>
<span
class="Object"
id="OBJ_PREFIX_DWT5524_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT5542_com_zimbra_url"><span
class="Object"
id="OBJ_PREFIX_DWT8021_com_zimbra_url"><span class="Object"
id="OBJ_PREFIX_DWT8042_com_zimbra_url"><a
href="https://forums.zimbra.org/viewtopic.php?f=9&t=69677"
rel="nofollow
noopener
noreferrer
nofollow
noopener
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nofollow
noopener
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noopener
noreferrer"
target="_blank"
moz-do-not-send="true">https://forums.zimbra.org/viewtopic.php?f=9&t=69677</a></span></span></span></span><br>
<span
style="font-family:'arial'
, sans-serif"><span
style="font-size:medium"><span lang="zxx"><span class="Object"></span></span></span></span></li>
</ul>
</li>
<li>Constructive
feedback on
these call
summaries is
always
welcome.</li>
</ul>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<div><br>
<span class="Object"
id="OBJ_PREFIX_DWT3266_com_zimbra_date"><span
class="Object"
id="OBJ_PREFIX_DWT3283_com_zimbra_date"><span
class="Object"
id="OBJ_PREFIX_DWT3767_com_zimbra_date"><span
class="Object"
id="OBJ_PREFIX_DWT3779_com_zimbra_date"><span
class="Object"
id="OBJ_PREFIX_DWT4734_com_zimbra_date"><span
class="Object"
id="OBJ_PREFIX_DWT4747_com_zimbra_date"><span
class="Object"
id="OBJ_PREFIX_DWT5427_com_zimbra_date"><span
class="Object"
id="OBJ_PREFIX_DWT5441_com_zimbra_date"><span
class="Object"
id="OBJ_PREFIX_DWT5525_com_zimbra_date"><span
class="Object"
id="OBJ_PREFIX_DWT5543_com_zimbra_date"><span
class="Object"
id="OBJ_PREFIX_DWT8022_com_zimbra_date"><span
class="Object"
id="OBJ_PREFIX_DWT8043_com_zimbra_date">June
15</span></span></span></span></span></span></span></span></span></span></span></span>,
2021</div>
</div>
</div>
<br>
<div><strong>Administrator Tip: Changing Disk IOPS In
AWS With Zimbra</strong><br>
Matthew F. shared a tip and said that he recently
changed the disk IOPS setting for his Zimbra servers
hosted at AWS from 3,000 to 6,000 on a Monday morning
to increase performance. The AWS documentation says
that when doing so, you should receive IOPS
performance between the old and new IOPS values while
the disk re-configuration is taking place, but in
practice Matthew found it dropped drastically to about
30-50 IOPS during the change, leading to an outage of
his Zimbra servers for about 2 hours. The disk volume
this change was applied to was 750 GB in size.
Matthew said he found that since the Zimbra mailboxd
service was unusable by users at such a low IOPS
performance level, that stopping the mailboxd service
slightly decreased the time that AWS required to
re-configure the IOPS setting.<br>
<br>
<strong>2-Factor Authentication and SAML Support in
Zimbra</strong><br>
Mark S. said that he noticed in the recent Zextras
3.2.0 release notes (
<a class="moz-txt-link-freetext" href="https://docs.zextras.com/zextras-suite-documentation/latest/changelog.html">https://docs.zextras.com/zextras-suite-documentation/latest/changelog.html</a>
), there was mention of improvements around 2-factor
authentication (2FA). He asked how these changes
relate to Synacor’s road map plans recently shared
with Zimbra Partners, such as if Zimbra will introduce
the capability to choose the 2FA engine that can be
used within a Zimbra installation. John E. said that
no information about this topic was publicly available
at this time.<br>
<br>
Mark S. also mentioned that the Zextras release notes
discuss some changes relating to SAML (
<a class="moz-txt-link-freetext" href="https://en.wikipedia.org/wiki/Security_Assertion_Markup_Language">https://en.wikipedia.org/wiki/Security_Assertion_Markup_Language</a>
) extension in Zimbra. He said that one of his
customers is trying to get Zimbra to work with a user
identity management product from Okta (
<a class="moz-txt-link-freetext" href="https://www.okta.com/">https://www.okta.com/</a> ) and they have been
encountering some challenges. John E. asked if Mark’s
customer is using the built-in SAML extension in
Zimbra (
<a class="moz-txt-link-freetext" href="https://zimbra.github.io/zimbra-9/adminguide.html#_zimbra_single_sign_on_using_saml_with_simplesamlphp">https://zimbra.github.io/zimbra-9/adminguide.html#_zimbra_single_sign_on_using_saml_with_simplesamlphp</a>
)? Mark confirmed that the customer is using this
feature. John said that the SAML implementation has
been designed to be very simple and that Synacor has
done many customer implementations with it. He
suggested that it is straightforward to modify the
SAML extension for the desired integration, but noted
that it is impossible for Synacor to distribute a
single implementation that works for all use cases.
He added that one perk of Zimbra is that its
authentication chain is very pluggable, so if you can
dream it, it can likely be built. John said the SAML
extension was significantly revamped between Zimbra
8.8.15 and 9.<br>
<br>
When Zimbra 9 was first released, it was highly
similar to 8.8.15, but has diverged greatly since, and
John E. encouraged everyone to upgrade to Zimbra 9, if
they have the means. As far as he is aware, the
improvements to the SAML extension in 9 were not
backported to 8.8.15. Additionally, the 2FA and
self-service user password reset feature (reset
forgotten passwords) were fixed a long time ago in
Zimbra 9, but those fixes have not yet been backported
to 8.8.15. John said he has been pushing internally
at Synacor to backport these fixes to 8.8.15, but the
developers have pushed back explaining that there
would be significant changes required in 8.8.15 to
make these backports possible. He said he is going to
keep pushing for these backports, but it is not clear
if this will ever occur, as the challenge is in
deciding where to invest developer resources – either
in backporting fixes, or focusing on newer Zimbra
versions. John said that if coming from a Zimbra
version earlier than 8.8.15, it is important to do a
stepped upgrade, by upgrading to 8.8.15 first, then to
Zimbra 9 or later, rather than attempting to directly
upgrade from a version prior to 8.8.15 to 9.<br>
<br>
<strong>Upcoming Changes In Zimbra Version Designation
and Packaging</strong><br>
John E. shared that Synacor is likely to move away in
the near future from identifying Zimbra versions in
its product marketing with numbers like Zimbra 9 and
instead change to a continuous release model, where
the product simply becomes known as Zimbra. Packaging
systems (Yum and Apt) will become the norm for
distributing all updates, as compared to the current
practice of downloading and running an installer
script for major version changes. Mark S. asked if it
will still be possible to upgrade to specific Zimbra
versions by using a packaging system. John E. said he
believes it will be possible to do a targeted update
using only the packaging systems. Noah P. pointed out
that for other software companies using the continuous
release model, there are certain breakpoints where
compatibility is broken with older versions, and asked
how Synacor will handle this scenario, as he would not
want to see Synacor in a position of needing to
balloon their quality assurance process to support
esoteric operating systems and very old Zimbra
releases. John E. said that updates will still have
package version numbers, while Zimbra will not be
marketed with a specific release number, but could not
comment further. Randy L. asked if Synacor plans to
continue to integrate security fixes with new Zimbra
builds in the packaging systems as they do now, or if
a separate repo will be introduced containing security
fixes only. John E. said he anticipates security
patches will continue to be released with the same
approach, as they are currently. Randy also asked if
Zimbra will continue to maintain separate repos for
each major release train, allowing Zimbra
administrators a choice of the major release train
they wish to subscribe to, or if only a single release
repo will be used. John E. said he was not sure how
this will be structured in the future. Mark S. asked
how this future versioning and packaging change might
affect anyone wanting to build Zimbra from source
code. John E. said that this change should not impose
any problems for those wanting to build from source,
and that if problems do arise, it should be raised
with Zimbra Support as a defect issue. He added that
the build system for Zimbra can be complicated and
finicky, but if you follow the documented instructions
carefully, it always works. He also commented that
Synacor continues to be very committed to releasing
Zimbra source code, and if confidence in this
statement is needed, consider the large number of
on-premise customers that rely on Zimbra’s open source
commitment, especially those in Asia and the EU, where
they have mandates for using open source products.
These are some of Synacor’s larger customers in those
regions. Noah P. added that, even for Zimbra Partners
who do not rely on the open source commitment, due to
the availability of commercial support, he still uses
the open source commitment as a marketing benefit to
draw customers away from proprietary, closed
platforms, like Microsoft or Google’s products. John
E. said that the only reason that features like
Exchange ActiveSync and Exchange Web Services, that
are integrated in Zimbra, are not open sourced as
well, is that those features have associated licensing
by the patent holder (Microsoft) that needs to be paid
as royalties.<br>
<br>
<strong>Update For Zimbra Support Of Ubuntu 20.04 LTS</strong><br>
Randy L. recalled that it was discussed in an earlier
Zeta Alliance call that Ubuntu 20.04 LTS support in
Zimbra was projected for June 2021, and asked if any
status updates were available, as he was waiting to do
some Zimbra 9 upgrades pending its availability. John
H. said that this was the original projection, but
with COVID-19 significantly impacting the region where
the Zimbra development team is located, Ubuntu 20.04
support has been pushed back to later this Summer.<br>
<br>
<strong>Simultaneously Updating Zimbra Mailbox Servers</strong><br>
Matthew F. asked if anyone on the call patches
multiple Zimbra mailbox servers simultaneously, or if
they patch mailbox servers sequentially,
one-at-a-time. Randy L. said that he routinely does
simultaneous patching of his mailbox servers in a
cluster, as he takes a snapshot of each before
upgrading, allowing for quick and easy roll backs if
anything goes wrong. He also added that this is
frequently necessary to hit his maintenance window
targets with customers. Mark S. said that he used to
patch mailbox servers simultaneously, but no longer
does so as he has had problems with this approach in
the past. He added that multiple Zimbra versions
should be able to co-exist within the same cluster as
a rolling upgrade, so sequential roll out should not
present a problem. Matthew F. said that his only
concern in doing simultaneous updates is that he sees
the patches undeploying and redeploying Zimlets, so he
is unsure if he needs the other mailbox servers online
while running an update. Randy L. said that this has
been of concern to him too, but he has yet to see this
present a problem post-update after installing
countless patches in the past, perhaps because each
mailbox server update process may be redundantly
undeploying and redeploying Zimlets on each local
mailbox server. Matthew F. said he will open a
support case with Zimbra to try and obtain a more
official answer on this topic.<br>
<br>
<strong>Recommended Zimbra 8.8.15 to 9 Upgrade
Procedure</strong><br>
Gary C. said that he will soon be doing a Zimbra
8.8.15 to 9 multi-server upgrade. He asked if things
are pretty smooth now with the 8.8.15 to 9 upgrade
process. John H. said that Synacor has a large number
of customers that have made the upgrade without
issue. Gary said he is planning to upgrade his LDAP
servers first, then the proxies, followed by his MTA
servers, and finally the mailbox servers. He asked,
in terms of timing, if he does not upgrade all of his
mailbox servers within the same short period of time,
how might this affect the operation of the cluster and
his Zimbra users? Mark S. said the official Zimbra
rolling upgrade documentation says that you should
have at least one mailbox server running version 9,
even if the other mailbox servers have not yet been
upgraded, so that the Zimbra Administration Console
can be run from that Zimbra 9 mailbox server to manage
the other 8.8.15 mailbox servers. Gary said in that
case, he may roll out a new mailbox server with
version 9 for this purpose and upgrade his existing
8.8.15 mailbox servers to 9 later. Noah P. said that,
given the scenario Gary describes, he believes that
all of Gary’s Zimbra users should see the new Zimbra
Web Client login screen (Modern UI), but that users
may see a mix of Classic and Modern UI experiences
post-login. Mark S. said that Gary can also take
8.8.15 mailbox servers out of his reverse proxy list,
with the appropriate zmprov command, so that those are
not available for clients to use. Matthew F. added
that Gary may need to do this for the Zimbra
Administration Console as well. Noah P. asked if
anyone knew of issues encountered by having a Zimbra 9
login page logging in to an 8.8.15 mailbox server.
Mark S. said that he had a customer do an extended
rolling Zimbra upgrade over a number of months, and
there did not appear to be any problems with this
approach.<br>
<br>
Gary asked for the thoughts of everyone on the call
about the wisdom of doing an in-place upgrade for
Ubuntu with Zimbra installed. Mark S. said that if it
is a single-server install of Zimbra, he finds that it
is much less risky to build a new Ubuntu server with
the desired version, then doing an incremental
migration upgrade of Zimbra (
<a class="moz-txt-link-freetext" href="https://zimbra.github.io/zimbra-9/adminguide.html#incremental-migration-with-backup">https://zimbra.github.io/zimbra-9/adminguide.html#incremental-migration-with-backup</a>
) from the old to the new server. Or, for
multi-server Zimbra installations, he suggested first
building new Ubuntu servers with the desired version,
installing Zimbra LDAP, and promoting those new LDAP
servers to leaders, then demoting the old Ubuntu LDAP
servers to followers/replicas, and finally deleting
those old LDAP servers from the cluster.<br>
<br>
Gary C. asked, if he has HSM enabled on all of his
mailbox servers with the Centralized Storage feature
in Zimbra, and he performs mailbox moves (
<a class="moz-txt-link-freetext" href="https://docs.zextras.com/zextras-suite-documentation/latest/powerstore.html#_moving_mailboxes_between_mailstores">https://docs.zextras.com/zextras-suite-documentation/latest/powerstore.html#_moving_mailboxes_between_mailstores</a>
) from his 8.8.15 to 9 servers, would any issues be
expected? Mark S. said Gary could encounter sporadic
time out issues with moving exceptionally large
mailboxes, including a user’s mailbox that Gary said
is close to 1 TB in size. Gary asked if moving
mailboxes in this manner would cause a mailbox in
Zimbra’s Centralized Storage to revert to using
Zimbra’s primary storage volume instead? Mark S. and
Randy L. commented that this should not be an issue if
Gary uses the proper options for the “zxsuite hsm
doMailboxMove” command to respect the current storage
policy. Randy added that he recalled a detailed
description provided by Cine on an earlier Zeta
Alliance call of the process the “zxsuite hsm
doMailboxMove” command uses to check the capabilities
of the source and destination mailbox servers and how
it auto-negotiates which features of of the command
are available based on the supported Zimbra and
Zextras versions of each server.<br>
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<div><span style="color:rgb( 255 , 102 , 0
);font-weight:bold"><br>
Randy Leiker (</span><span
style="font-weight:bold"> <span
style="color:rgb( 51 , 51 , 255
);background-color:rgb( 255 , 255 , 255 )"><a class="moz-txt-link-abbreviated" href="mailto:randy@skywaynetworks.com">randy@skywaynetworks.com</a></span>
<span style="color:rgb( 255 , 102 , 0 )">)</span></span><br>
<span style="color:rgb( 0 , 0 , 153 )">Skyway
Networks, LLC</span></div>
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