similar to: Corrupted SSL parameters file in state_dir: ssl-parameters.dat

Dovecot 2.2.10 Centos 7 Linux 3.10.0-514.26.2.el7.x86_64 #1 SMP Tue Jul 4 15:04:05 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux I have been experimenting with backup options to another server using dovadm and was trying to use the doveadm service as a workaround seeing as I couldn't decipher what the docs were saying about ssh. My doveadm stanza looks as follows: service doveadm {

Based on the recent found weaknesses in DH key exchange, http://weakdh.org/ I increased ssl_dh_parameters_length to 2048 bits, and found waited for 5+ minutes for dovecot to come back online after a restart. Unless you got a fast machine, the initialization of DH parameters can exceed your patience. Regeneration may not be a problem (if ssl_parameters_regenerate=0 or if Dovecot uses old

Hi, with the latest HG 267bca7a62fb the following error started to appear in the logs: Oct 31 09:39:07 nihlus dovecot: master: Dovecot v2.2.15 (267bca7a62fb) starting up for imap, lmtp [...] Oct 31 10:10:52 nihlus dovecot: lmtp(20876): Error: Corrupted SSL parameters file in state_dir: ssl-parameters.dat - disabling SSL 360 Oct 31 10:10:52 nihlus dovecot: lmtp(20876): Error: Couldn't

Help Thank You, Ken Zachreson On Aug 6, 2017 2:00 AM, dovecot-request at dovecot.org wrote: ATTENTION: This email was sent from someone outside of GCRC. Always use caution when opening attachments or clicking links, and when receiving unexpected emails. Send dovecot mailing list submissions to dovecot at dovecot.org To subscribe or unsubscribe via the World Wide Web, visit

Quoting Gedalya <gedalya at gedalya.net>: > On 05/26/2015 10:37 AM, Ron Leach wrote: >> https://weakdh.org/sysadmin.html >> >> includes altering DH parameters length to 2048, and re-specifying the >> allowable cipher suites - they give their suggestion. > > It looks like there is an error on this page regarding regeneration. In > current dovecots

Quoting Gedalya <gedalya at gedalya.net>: > On 05/27/2015 09:55 AM, Rick Romero wrote: >> Quoting Gedalya <gedalya at gedalya.net>: >> >>> On 05/26/2015 10:37 AM, Ron Leach wrote: >>>> https://weakdh.org/sysadmin.html >>>> >>>> includes altering DH parameters length to 2048, and re-specifying the >>>> allowable

Sharing an installed copy of dovecot between several users each running a daemon within their own account (or using the same binaries for a system daemon and a user daemon) is difficult because the compile-time directory PKG_STATEDIR (typically /var/lib/dovecot) is hard-coded as the location of things like the ssl-parameters.dat file and the replicator database. Replace all these uses of

Actually you need to use ssl_dh=</usr/local/etc/dovecot/dh.pemNote the <Aki -------- Original message --------From: "Michael A. Peters" <mpeters at domblogger.net> Date: 13/11/2018 05:44 (GMT+02:00) To: dovecot at dovecot.org Subject: Re: New install - getting error: "Failed to initialize SSL server context: Couldn't parse DH parameters" tryopenssl dhparam

I?m setting up Dovecot using Homebrew on a new server and am getting this when I try to login via IMAP: Nov 13 14:13:35 auth: Debug: auth client connected (pid=30719) Nov 13 14:13:35 imap-login: Info: Aborted login (no auth attempts in 0 secs): user=<>, rip=::1, lip=::1, secured, session=<gM0HNIN6HtoAAAAAAAAAAAAAAAAAAAAB> Nov 13 14:18:33 auth: Debug: Loading modules from directory:

I did that the last time one year ago, now on another machine with the same software (Ubuntu 16.04) it fails. openssl dhparam 4096 > /var/lib/dovecot/ssl-parameters.dat dd if=/var/lib/dovecot/ssl-parameters.dat bs=1 skip=88 | openssl dhparam -inform der > /etc/dovecot/dh.pem last command fails with 681+0 records in 681+0 records out 681 bytes copied, 0,00278343 s, 245 kB/s unable to load

> On 19 August 2018 at 20:55 Aki Tuomi <aki.tuomi at dovecot.fi> wrote: > > > > > On 19 August 2018 at 19:38 Kai Schaetzl <maillists at conactive.com> wrote: > > > > > > Aki Tuomi wrote on Sun, 19 Aug 2018 18:21:31 +0300: > > > > > Just generate new parameters on some machine with good entropy source. > > > > So, if

Hello, after switching from version 2.2.7 to 2.2.7 I miss the loglines which say: ssl-params: Generating SSL parameters ssl-params: SSL parameters regeneration completed The configuration has not been changed and reads: | # 2.2.7: /usr/local/dovecot/etc/dovecot/dovecot.conf | # OS: Linux 2.6.35.14-106.fc14.i686.PAE i686 Fedora release 14 (Laughlin) ext3 | auth_mechanisms = plain login |

List, good afternoon, I was reading up on a TLS Diffie Hellman protocol weakness described here https://weakdh.org/sysadmin.html which is similar to the earlier FREAK attack, and can result in downgrade of cipher suites. Part of the solution workaround that the researchers describe for Dovecot here https://weakdh.org/sysadmin.html includes altering DH parameters length to 2048, and

On 05/27/2015 09:55 AM, Rick Romero wrote: > Quoting Gedalya <gedalya at gedalya.net>: > >> On 05/26/2015 10:37 AM, Ron Leach wrote: >>> https://weakdh.org/sysadmin.html >>> >>> includes altering DH parameters length to 2048, and re-specifying the >>> allowable cipher suites - they give their suggestion. >> >> It looks like there

Aki Tuomi wrote on Sun, 19 Aug 2018 18:21:31 +0300: > Just generate new parameters on some machine with good entropy source. So, if it fails to transform (although bigger) the machine hasn't enough entropy (because it's quite new?)? I'm generating now on the original machine from last year which is still going on while a second run on one of the machines where it failed to

On 04.03.2015 18:19, Emmanuel Dreyfus wrote: > On Wed, Mar 04, 2015 at 06:13:31PM +0200, Adrian Minta wrote: >> Hello, >> about the CVE-2015-0204, in apache the following config seems to disable >> this vulnerability: >> SSLProtocol All -SSLv2 -SSLv3 >> SSLCipherSuite >> HIGH:MEDIUM:!aNULL:!eNULL:!EXPORT:!CAMELLIA:!DES:!MD5:!PSK:!RC4 >> >> Is

>It is not at this point emphasized anywhere, including on weakdh.org, that it is actually of high importance to regenerate your DH parameters frequently. That's not really correct. If you're using a prime of length at least 2048 bits, then the corresponding discrete-log problem is well-beyond the pre-computation ability of the NSA (or anyone else). It is computationally intensive to

Hi, we found a bug in ssl-params. It calls openssl DH generator for 512 and 1024 bits, but in FIPS mode, openssl won't generate anything for less than 1024, so it fails with: error:0506A06E:Diffie-Hellman routines:DH_BUILTIN_GENPARAMS:key size too small but when DH generator fails, ssl-params hangs forever in io_loop_run: __epoll_wait_nocancel() io_loop_handler_run(..) at

HotSlots Webmaster <webmaster at hotslots132.com> writes: > I have had Dovecot working fine with SSL for nearly two years now. It's > time to renew the SSL certificate, so I did (same CA). The new > certificate works fine in Apache and Postfix. But when I update Dovecot > to use the same certificate, and restart the server, Dovecot stops > responding to connects. > ...

Hello, from my understanding, using 1024bit DH parameters results in a not sufficiently secure key exchange for DH(E). Therefore I think it would be advisable to have parameters of at least 2048bit . In fact, I would see a great benefit in chosing parameter length arbitrarily. I also do not see the benefit of parameter regeneration. What were the design goals here? Thanks, J?rg L?bbert