No ssl connection possible to IMAP with roundcube Disconnected (no auth attempts in 0 secs): user=<>

[Michael Windelen]

Hi, after Upgrading from 14.10 to 15.04 it is not longer possible to connect to my local imap Server with roundcube. Thunderbird works well.

mail.err
dovecot: imap-login: Disconnected (no auth attempts in 0 secs): user=<>, rip=127.0.0.1, lip=127.0.0.1, TLS, session=<HKtEVBsVNgB/AAAB>

roundcube/error

Could not connect to ssl://localhost:993: Unknown reason (fsockopen() function disabled?) in /usr/share/roundcube/program/lib/Roundcube/rcube_imap.php on line 184 (POST /webmail/?_task=login&_action=login)

May this help?
http://trac.roundcube.net/ticket/1489948

# lsb_release -rd
Description: Ubuntu 15.04
Release: 15.04

# apt-cache policy roundcube
roundcube:
  Installiert: 0.9.5+dfsg1-4.2
  Installationskandidat: 0.9.5+dfsg1-4.2
  Versionstabelle:
 *** 0.9.5+dfsg1-4.2 0
        500 http://archive.ubuntu.com/ubuntu/ vivid/universe amd64 Packages
        100 /var/lib/dpkg/status

Best

Michael

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Sven Killig (sven-killig)]

I might be affected, too. But on Debian 7 -> 8.
I solved it by replacing localhost with the external interface's DNS name.

[Joe Clifford (joeclifford)]

I've just been affected by this on a Debian 8 install too. It seems the issue is related to the version of PHP > 5.6 which now checks SSL certificates are valid by default - if the CN of the certificate doesn't match the connection string used by Roundcube, the connection will fail.
Setting the Roundcube config default host connection string

$config['default_host'] = 'ssl://hostname';

so that hostname matches the CN in the SSL certificate solves the problem.

Also see here: https://bbs.archlinux.org/viewtopic.php?id=187063

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.