similar to: Restricting SSL/TLS protocol versions on Dovecot 2.2.22

> On Jul 29, 2018, at 6:02 PM, Alexander Dalloz <ad+lists at uni-x.org> wrote: > > Am 29.07.2018 um 21:02 schrieb J Doe: >> Hello, >> I have a question regarding SSL/TLS settings for Dovecot version 2.2.22. >> In: 10-ssl.conf there are two parameters: >> ssl_protocols >> ssl_cipher_list >> ssl_protocols is commented with ?SSL protocol to

On Mon, Dec 01, 2014 at 09:27:48PM -0800, Darren Pilgrim wrote: > On 12/1/2014 4:43 PM, Will Yardley wrote: > > Can you use both ssl_protocols *and* ssl_cipher_list in the same config > > (in a way that's sane)? > > > Is there a way to exclude these ciphers, while still keeping my config > > easy to parse and avoiding duplicative or deprecated configs? > >

On 12/2/2014 1:32 AM, Reindl Harald wrote: > > Am 02.12.2014 um 06:44 schrieb Will Yardley: >> On Mon, Dec 01, 2014 at 09:27:48PM -0800, Darren Pilgrim wrote: >>> On 12/1/2014 4:43 PM, Will Yardley wrote: >>>> Can you use both ssl_protocols *and* ssl_cipher_list in the same config >>>> (in a way that's sane)? >>> >>>> Is there a

Can you use both ssl_protocols *and* ssl_cipher_list in the same config (in a way that's sane)? ssl_protocols (>= 2.1) and ssl_cipher_list co-exist, or are they mutually exclusive? I have a Dovecot 2.2.13 system, and I tried setting: I also tried things like ssl_cipher_list = HIGH or ssl_cipher_list = HIGH:!MEDIUM:!LOW however, doing this seems to make v3 still work unless I

Thank You for answers. But: 1. How should be properly configured ssl_cipher_list? 2. Ok, removed !TLSv1 !TLSv1.1. 3. Strange thing with ssl_protocols and ssl_cipher_list, because on older server on Ubuntu 14.04 LTS, dovecot 2.2.9 and postfix 2.11.0 these two lines looks exactly this same and no errors in mail.err file and mailes works without any problem. 4. No, currently I don't use LMTP.

Hi, I am Yoshi, Japanese. I used FreeBSD 10.1 Dovecot 2.2.15 I want pop3s, so I made /usr/local/etc/dovecot/local.conf ssl = yes ssl_cert = </usr/local/etc/dovecot/server.pem ssl_key = </usr/local/etc/dovecot/server.key ssl_ca = </usr/local/etc/dovecot/ca.pem ssl_protocols = !SSLv2 !SSLv3 ssl_cipher_list = ALL:!LOW:!SSLv2:!SSLV3:!EXP:!aNULL:!RC4 It's work fine. But, change

Hi, To default dovecot.conf file I added (based on found documentation): ssl = required disable_plaintext_auth = yes #change default 'no' to 'yes' ssl_prefer_server_ciphers = yes ssl_options = no_compression ssl_dh_parameters_length = 2048 ssl_cipher_list =

I have the following two settings in my "10-ssl.conf" file # SSL protocols to use ssl_protocols = !SSLv2 # SSL ciphers to use ssl_cipher_list = ALL:!LOW:!SSLv2:!EXP:!aNULL I have seen different configurations while Googling. I am wondering what the consensus is for the best settings for these two items. What do the developers recommend? Thanks! -- Jerry

> On 30 July 2018 at 21:42 J Doe <general at nativemethods.com> wrote: > > > > > On Jul 29, 2018, at 6:02 PM, Alexander Dalloz <ad+lists at uni-x.org> wrote: > > > > Am 29.07.2018 um 21:02 schrieb J Doe: > >> Hello, > >> I have a question regarding SSL/TLS settings for Dovecot version 2.2.22. > >> In: 10-ssl.conf there are

This is driven by the fact that OpenSSL 1.1 does not know about SSLv2 at all and dovecot's defaults simply make OpenSSL error out with "Unknown protocol 'SSLv2'"[1]. So we change the defaults to refer to SSLv2 iff OpenSSL seems to know something about it. While at it, it's also a good idea to disable SSLv3 by default as well. [1] https://bugs.debian.org/844347

Hi Folks, after adding TLSv1.2 to by TLS options a lot of Outlook users complaint about connection errors, openssl s_client and Thunderbird works fine. I found some posts about this but none of them had a real solution on this - I meanwhile disabled TLSv1.2 which made the Outlook users happy. I run dovecot 2.2.13, OpenSSL 1.0.1j 15 Oct 2014 ssl_cert = </var/qmail/control/servercert.pem

Cipher list which You post provide better compatibility or security than those which I currently have? On older software version these cipher list works well and not generate any errors when I run Internal PCI scan test from https://cloud.tenable.com for another server. But for new server with newer software during test I got errors in mail.err. 2017-04-27 10:00 GMT+02:00 Aki Tuomi <aki.tuomi

Hi All First the essentials: dovecot --version: 2.2.15 /usr/local/etc/dovecot/conf.d/10-ssl.conf: ssl = required ssl_cert = </usr/local/openssl/certs/mail.domain.com.chained.dovecot.ecdsa.crt ssl_key = </usr/local/openssl/certs/mail.domain.com.ecdsa.key ssl_protocols = !SSLv2 !SSLv3 ssl_cipher_list =

What kind of test are you running? Aki > On April 27, 2017 at 12:00 PM Poliman - Serwis <serwis at poliman.pl> wrote: > > > I turned of ssl_cipher_list in dovecot.conf file (so it's default) but test > still gives errors: > Apr 27 08:55:06 serwer-1 dovecot: pop3-login: Error: SSL: Stacked error: > error:140760FC:SSL routines:SSL23_GET_CLIENT_HELLO:unknown

According to https://cipherli.st/ > ssl = yes > ssl_cert = </etc/dovecot.cert > ssl_key = </etc/dovecot.key > ssl_protocols = !SSLv2 !SSLv3 > ssl_cipher_list = AES128+EECDH:AES128+EDH > ssl_prefer_server_ciphers = yes # >Dovecot 2.2.6 > Is what you want. Ok, so I have changed my ssl_cipher_list to: ssl_cipher_list = AES128+EECDH:AES128+EDH Before I made this change

Hi all, when hardening dovecot against the POODLE vulnerability, we followed the advise to disable SSL2 and SSL3 but this is giving problems with some email clients (claws-mail). ssl_protocols = !SSLv2 !SSLv3 results in the following error: dovecot: pop3-login: Disconnected (no auth attempts in 1 secs): user=<>, rip=XXX, lip=XXX, TLS handshaking: SSL_accept() failed: error:1408A0C1:SSL

On Sun, 18 Jan 2015 09:45:16 +0100, Robert Schetterer stated: >Am 16.01.2015 um 12:24 schrieb Oliver Welter: >> Hi Folks, >> >> after adding TLSv1.2 to by TLS options a lot of Outlook users complaint >> about connection errors, openssl s_client and Thunderbird works fine. >> >> I found some posts about this but none of them had a real solution on >>

On 09/03/16 10:44, Florent B wrote: > Hi, > > I don't see any SSL configuration option in Dovecot to disable > "Client-initiated secure renegotiation". > > It is advised to disable it as it can cause DDoS (CVE-2011-1473). > > Is it possible to have this possibility through an SSL option or other ? > > Thank you. > > Florent ssl_protocols = !SSLv3

Am 29.07.2018 um 21:02 schrieb J Doe: > Hello, > > I have a question regarding SSL/TLS settings for Dovecot version 2.2.22. > > In: 10-ssl.conf there are two parameters: > > ssl_protocols > ssl_cipher_list > > ssl_protocols is commented with ?SSL protocol to use? and ssl_cipher_list is commented with ?SSL ciphers to use?. > > If I want to disable

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 something similar possible with dovecot ? If yes, what are the implications with old mail clients ? -- Best regards, Adrian Minta