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Nick Bebout 2022-02-15 12:29:45 -06:00
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28
FAQ.d/FAQ.SSL_errors.txt
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@ -1,14 +1,14 @@
#!/bin/cat
$Id: FAQ.SSL_errors.txt,v 1.15 2021/06/22 15:35:10 gilles Exp gilles $
$Id: FAQ.SSL_errors.txt,v 1.17 2021/08/01 12:49:00 gilles Exp gilles $
This document is also available online at
https://imapsync.lamiral.info/FAQ.d/
https://imapsync.lamiral.info/FAQ.d/FAQ.SSL_errors.txt
=======================================================================
======================================================================
Imapsync SSL errors
=======================================================================
======================================================================
Questions answered in this FAQ are:
@ -25,11 +25,14 @@ Q. SSL connect attempt failed SSL
SSL connect attempt failed SSL
SSL routines:ssl_choose_client_version:unsupported protocol
Q. fatal SSL error: SSL connect attempt failed with unknown error
SSL wants a read first
Q. How to see the certificate and identify problems in it?
Now the questions again with their answers.
=======================================================================
======================================================================
Q. What are the errors
DEBUG: .../IO/Socket/SSL.pm:1165: local error: SSL write error
or
@ -45,11 +48,11 @@ it's often Exchange or Office365. I don't know what exactly happens.
Those errors happen more often on Windows than on Linux.
=======================================================================
======================================================================
Q. What can I do to avoid those "SSL read/write errors"?
R0. Windows users: upgrade to imapsync.exe release 1.836 (or next ones)
Those errors don't appear with recent releases, post 1.836
Those errors appear less often with imapsync releases post 1.836
R1. Remove all ssl/tls encryption
@ -70,7 +73,7 @@ R5. Set up a ssltunnel proxy to the host.
Read the file FAQ.Security.txt for an example to set up
a ssltunnel proxy.
=======================================================================
======================================================================
Q. SSL connect attempt failed SSL
routines:SSL23_GET_SERVER_HELLO:sslv3 alert handshake failure
or
@ -145,8 +148,13 @@ when they receive a TLS version 1.1 request.
In this case setting the version
to 'SSLv23:!SSLv2:!SSLv3:!TLSv1_1:!TLSv1_2' might help.
======================================================================
Q. fatal SSL error: SSL connect attempt failed with unknown error
SSL wants a read first
=======================================================================
R. If you're using --ssl1 or --ssl2, try instead --tls1 or --tls2
======================================================================
Q. How to see the certificate and identify problems in it?
R. Use the command openssl like this:
@ -221,5 +229,5 @@ ggEBANuPNbYLPMZ4vPa9NBoHAUdIXqpi0eqdXMXd2sT+qRmqxS5ihr999BHOROcr
...
=======================================================================
=======================================================================
======================================================================
======================================================================