I have a problem. Default config of dovecot (version 2.2.22) and postfix (3.1) on ubuntu (16.04 LTS with OpenSSL 1.0.2k 26 Jan 2017). On website https://cloud.tenable.com I run Internal PCI Scan. Result in /var/log/mail.err (thousands of lines): Code: Apr 27 09:43:00 serwer-1 dovecot: imap-login: Error: SSL: Stacked error: error:140760FC:SSL routines:SSL23_GET_CLIENT_HELLO:unknown protocol Apr 27 09:43:01 serwer-1 dovecot: pop3-login: Error: SSL: Stacked error: error:140760FC:SSL routines:SSL23_GET_CLIENT_HELLO:unknown protocol Apr 27 09:46:45 serwer-1 dovecot: imap-login: Error: SSL: Stacked error: error:140760FC:SSL routines:SSL23_GET_CLIENT_HELLO:unknown protocol Apr 27 09:46:45 serwer-1 dovecot: imap-login: Error: SSL: Stacked error: error:140760FC:SSL routines:SSL23_GET_CLIENT_HELLO:unknown protocol Apr 27 09:46:45 serwer-1 dovecot: imap-login: Error: SSL: Stacked error: error:1408A10B:SSL routines:ssl3_get_client_hello:wrong version number Apr 27 09:46:45 serwer-1 dovecot: imap-login: Error: SSL: Stacked error: error:1408A10B:SSL routines:ssl3_get_client_hello:wrong version number Apr 27 09:46:46 serwer-1 dovecot: pop3-login: Error: SSL: Stacked error: error:140760FC:SSL routines:SSL23_GET_CLIENT_HELLO:unknown protocol Apr 27 09:46:46 serwer-1 dovecot: pop3-login: Error: SSL: Stacked error: error:140760FC:SSL routines:SSL23_GET_CLIENT_HELLO:unknown protocol Apr 27 09:46:47 serwer-1 dovecot: pop3-login: Error: SSL: Stacked error: error:1408A10B:SSL routines:ssl3_get_client_hello:wrong version number Apr 27 09:46:47 serwer-1 dovecot: pop3-login: Error: SSL: Stacked error: error:1408A10B:SSL routines:ssl3_get_client_hello:wrong version number Apr 27 09:46:52 serwer-1 dovecot: imap-login: Error: SSL: Stacked error: error:140760FC:SSL routines:SSL23_GET_CLIENT_HELLO:unknown protocol Apr 27 09:46:53 serwer-1 dovecot: imap-login: Error: SSL: Stacked error: error:140760FC:SSL routines:SSL23_GET_CLIENT_HELLO:unknown protocol Apr 27 09:46:53 serwer-1 dovecot: imap-login: Error: SSL: Stacked error: error:1408A10B:SSL routines:ssl3_get_client_hello:wrong version number Apr 27 09:46:53 serwer-1 dovecot: imap-login: Error: SSL: Stacked error: error:1408A10B:SSL routines:ssl3_get_client_hello:wrong version number Apr 27 09:46:58 serwer-1 dovecot: pop3-login: Error: SSL: Stacked error: error:140760FC:SSL routines:SSL23_GET_CLIENT_HELLO:unknown protocol Apr 27 09:46:58 serwer-1 dovecot: pop3-login: Error: SSL: Stacked error: error:140760FC:SSL routines:SSL23_GET_CLIENT_HELLO:unknown protocol Apr 27 09:46:59 serwer-1 dovecot: pop3-login: Error: SSL: Stacked error: error:1408A10B:SSL routines:ssl3_get_client_hello:wrong version number Apr 27 09:46:59 serwer-1 dovecot: pop3-login: Error: SSL: Stacked error: error:1408A10B:SSL routines:ssl3_get_client_hello:wrong version number Apr 27 09:47:08 serwer-1 dovecot: imap-login: Error: SSL: Stacked error: error:1408F119:SSL routines:SSL3_GET_RECORD:decryption failed or bad record mac Apr 27 09:47:08 serwer-1 dovecot: pop3-login: Error: SSL: Stacked error: error:1408F119:SSL routines:SSL3_GET_RECORD:decryption failed or bad record mac Apr 27 09:47:10 serwer-1 dovecot: imap-login: Error: SSL: Stacked error: error:1408F119:SSL routines:SSL3_GET_RECORD:decryption failed or bad record mac Apr 27 09:47:10 serwer-1 dovecot: pop3-login: Error: SSL: Stacked error: error:1408F119:SSL routines:SSL3_GET_RECORD:decryption failed or bad record mac Apr 27 09:47:11 serwer-1 dovecot: imap-login: Error: SSL: Stacked error: error:1408A0E3:SSL routines:ssl3_get_client_hello:parse tlsext Apr 27 09:47:11 serwer-1 dovecot: imap-login: Error: SSL: Stacked error: error:1408A0E3:SSL routines:ssl3_get_client_hello:parse tlsext Apr 27 09:47:12 serwer-1 dovecot: pop3-login: Error: SSL: Stacked error: error:1408A0E3:SSL routines:ssl3_get_client_hello:parse tlsext Apr 27 09:47:12 serwer-1 dovecot: pop3-login: Error: SSL: Stacked error: error:1408A0E3:SSL routines:ssl3_get_client_hello:parse tlsext Apr 27 09:47:16 serwer-1 dovecot: imap-login: Error: SSL: Stacked error: error:1408A0E3:SSL routines:ssl3_get_client_hello:parse tlsext Apr 27 09:47:16 serwer-1 dovecot: imap-login: Error: SSL: Stacked error: error:1408A0E3:SSL routines:ssl3_get_client_hello:parse tlsext Apr 27 09:47:17 serwer-1 dovecot: pop3-login: Error: SSL: Stacked error: error:1408A0E3:SSL routines:ssl3_get_client_hello:parse tlsext Apr 27 09:47:18 serwer-1 dovecot: imap-login: Error: SSL: Stacked error: error:1408A10B:SSL routines:ssl3_get_client_hello:wrong version number Apr 27 09:47:18 serwer-1 dovecot: imap-login: Error: SSL: Stacked error: error:1408F119:SSL routines:SSL3_GET_RECORD:decryption failed or bad record mac Apr 27 09:47:18 serwer-1 dovecot: pop3-login: Error: SSL: Stacked error: error:1408A0E3:SSL routines:ssl3_get_client_hello:parse tlsext Apr 27 09:47:18 serwer-1 dovecot: imap-login: Error: SSL: Stacked error: error:1408F119:SSL routines:SSL3_GET_RECORD:decryption failed or bad record mac Apr 27 09:47:18 serwer-1 dovecot: pop3-login: Error: SSL: Stacked error: error:1408A10B:SSL routines:ssl3_get_client_hello:wrong version number Apr 27 09:47:18 serwer-1 dovecot: pop3-login: Error: SSL: Stacked error: error:1408F119:SSL routines:SSL3_GET_RECORD:decryption failed or bad record mac Apr 27 09:47:18 serwer-1 dovecot: pop3-login: Error: SSL: Stacked error: error:1408F119:SSL routines:SSL3_GET_RECORD:decryption failed or bad record mac Apr 27 09:47:20 serwer-1 dovecot: imap-login: Error: SSL: Stacked error: error:1408A10B:SSL routines:ssl3_get_client_hello:wrong version number Apr 27 09:47:21 serwer-1 dovecot: imap-login: Error: SSL: Stacked error: error:1408F119:SSL routines:SSL3_GET_RECORD:decryption failed or bad record mac Apr 27 09:47:21 serwer-1 dovecot: imap-login: Error: SSL: Stacked error: error:1408F119:SSL routines:SSL3_GET_RECORD:decryption failed or bad record mac Apr 27 09:47:21 serwer-1 dovecot: pop3-login: Error: SSL: Stacked error: error:1408A10B:SSL routines:ssl3_get_client_hello:wrong version number Apr 27 09:47:22 serwer-1 dovecot: pop3-login: Error: SSL: Stacked error: error:1408F119:SSL routines:SSL3_GET_RECORD:decryption failed or bad record mac Apr 27 09:47:23 serwer-1 dovecot: pop3-login: Error: SSL: Stacked error: error:1408F119:SSL routines:SSL3_GET_RECORD:decryption failed or bad record mac Apr 27 09:47:23 serwer-1 dovecot: imap-login: Error: SSL: Stacked error: error:1408A0C1:SSL routines:ssl3_get_client_hello:no shared cipher Apr 27 09:47:23 serwer-1 dovecot: imap-login: Error: SSL: Stacked error: error:1408A0C1:SSL routines:ssl3_get_client_hello:no shared cipher Apr 27 09:47:23 serwer-1 dovecot: imap-login: Error: SSL: Stacked error: error:1408A0C1:SSL routines:ssl3_get_client_hello:no shared cipher Apr 27 09:47:24 serwer-1 dovecot: imap-login: Error: SSL: Stacked error: error:1408A0C1:SSL routines:ssl3_get_client_hello:no shared cipher Apr 27 09:47:24 serwer-1 dovecot: imap-login: Error: SSL: Stacked error: error:1408A0C1:SSL routines:ssl3_get_client_hello:no shared cipher Apr 27 09:47:24 serwer-1 dovecot: imap-login: Error: SSL: Stacked error: error:1408A0C1:SSL routines:ssl3_get_client_hello:no shared cipher Apr 27 09:47:24 serwer-1 dovecot: imap-login: Error: SSL: Stacked error: error:1408A0C1:SSL routines:ssl3_get_client_hello:no shared cipher Should I be worried about it? Does it mean that server is enough (or too much) secured?
