Re: [qmailtoaster] SSL Problem Dovecot

2019-09-03 Thread Andrew Swartz
Some background: During the TLS negotiation, the client gives the server a list of ciphers which it supports, then from that list the server chooses which one to use. The server's cipher list is a list, in order of preference, of the ciphers it will use (from the client's list). If there is

RE: [qmailtoaster] SSL Problem Dovecot

2019-09-03 Thread CarlC Internet Services Service Desk
Actually, doing the openssl ciphers > /var/qmail/control/tlsservercipher is a starting point. After I did that, I then ran my server through some tests. I happen to use OpenVAS [which tool you want to use to find insecure SSL connections is up to you]. It was able to tell me which ciphers to

Re: [qmailtoaster] SSL Problem Dovecot

2019-09-03 Thread Gary Bowling
Thanks for that Carl. I'm running openssl-1.0.2k-16.el7_6.1.x86_64 Pretty much everything about my server is continuously updated stock Centos 7. Currently at CentOS Linux release 7.6.1810 (Core) I do have epel installed, which updates so

RE: [qmailtoaster] SSL Problem Dovecot

2019-09-03 Thread CarlC Internet Services Service Desk
Your real problem is that this file is different based on which CentOS you’re on [or should I say, which openssl is loaded]. If you have CentOS 7, with openssl 1.0.2k, you can tune this file to include each cipher you want [the file can actually be 10+ lines long wrapped]. This is so you can rem

Re: [qmailtoaster] SSL Problem Dovecot

2019-09-03 Thread Gary Bowling
So this may be an issue of the tlsserverciphers file. Some times it's interesting not knowing what your doing! haha I guess the question I have is.. What is the proper tlsserverciphers for a qmailtoaster with a letsencrypt certificate. If th

[qmailtoaster] SSL Problem Dovecot

2019-09-03 Thread Gary Bowling
I had to get a new cert for my server, which I installed yesterday. Now I'm having problems with certain clients logging in. I get the following error in the dovecot.log. TLS handshaking: SSL_accept() failed: error:1408A10B:SSL routines: ssl3_get