<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">The most likely cause would be that Twisted doesn't handle firstPacketFollows properly, which seems to be the case looking at <a href="https://github.com/twisted/twisted/blob/trunk/src/twisted/conch/ssh/transport.py#L869" class="">https://github.com/twisted/twisted/blob/trunk/src/twisted/conch/ssh/transport.py#L869</a> <div class="">Can you add that to the Twisted bug report?<div class=""><br class=""></div><div class="">Cheers,</div><div class="">Matt</div><div class=""><br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Tue 5/6/2018, at 1:12 am, Michael Ducharme <<a href="mailto:mducharme@gobcn.ca" class="">mducharme@gobcn.ca</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class=""><div class="">I recently upgraded our Zenoss system to 6.1.2 which includes a newer version of Twisted python framework. This new version of Twisted no longer connects to dropbear on our Ubiquiti radios.</div><div class=""><br class=""></div><div class="">When Twisted tries to connect, the connection is lost while authenticating, and dropbear logs the error:</div><div class=""><br class=""></div><div class="">Jun 4 10:29:02 dropbear[28183]: Child connection from 206.red.ac.ted:60338<br class="">Jun 4 10:29:04 dropbear[28183]: Exit before auth: Integrity error<br class="">Jun 4 10:29:07 dropbear[28195]: Child connection from 206.red.ac.ted:60342<br class="">Jun 4 10:29:09 dropbear[28195]: Exit before auth: Integrity error</div><div class=""><br class=""></div><div class="">I've been able to reproduce this issue with the latest release of twisted, 18.4.0, which I installed on another server by itself. This issue did not happen on the 2 or 3 year old version of Zenoss we were upgrading from, which presumably used an older version of Twisted.<br class=""></div><div class=""><br class=""></div><div class="">I submitted a bug report with twisted (<a href="https://twistedmatrix.com/trac/ticket/9464" class="">https://twistedmatrix.com/trac/ticket/9464</a>) but thought I would ask here on the off chance that it is due to a dropbear bug.<br class=""></div></div>
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