2 ## Authentication processes
5 # Disable LOGIN command and all other plaintext authentications unless
6 # SSL/TLS is used (LOGINDISABLED capability). Note that if the remote IP
7 # matches the local IP (ie. you're connecting from the same computer), the
8 # connection is considered secure and plaintext authentication is allowed.
9 # See also ssl=required setting.
10 #disable_plaintext_auth = yes
12 # Authentication cache size (e.g. 10M). 0 means it's disabled. Note that
13 # bsdauth, PAM and vpopmail require cache_key to be set for caching to be used.
15 # Time to live for cached data. After TTL expires the cached record is no
16 # longer used, *except* if the main database lookup returns internal failure.
17 # We also try to handle password changes automatically: If user's previous
18 # authentication was successful, but this one wasn't, the cache isn't used.
19 # For now this works only with plaintext authentication.
20 #auth_cache_ttl = 1 hour
21 # TTL for negative hits (user not found, password mismatch).
22 # 0 disables caching them completely.
23 #auth_cache_negative_ttl = 1 hour
25 # Space separated list of realms for SASL authentication mechanisms that need
26 # them. You can leave it empty if you don't want to support multiple realms.
27 # Many clients simply use the first one listed here, so keep the default realm
31 # Default realm/domain to use if none was specified. This is used for both
32 # SASL realms and appending @domain to username in plaintext logins.
35 # List of allowed characters in username. If the user-given username contains
36 # a character not listed in here, the login automatically fails. This is just
37 # an extra check to make sure user can't exploit any potential quote escaping
38 # vulnerabilities with SQL/LDAP databases. If you want to allow all characters,
39 # set this value to empty.
40 #auth_username_chars = abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890.-_@
42 # Username character translations before it's looked up from databases. The
43 # value contains series of from -> to characters. For example "#@/@" means
44 # that '#' and '/' characters are translated to '@'.
45 #auth_username_translation =
47 # Username formatting before it's looked up from databases. You can use
48 # the standard variables here, eg. %Lu would lowercase the username, %n would
49 # drop away the domain if it was given, or "%n-AT-%d" would change the '@' into
50 # "-AT-". This translation is done after auth_username_translation changes.
51 #auth_username_format = %Lu
53 # If you want to allow master users to log in by specifying the master
54 # username within the normal username string (ie. not using SASL mechanism's
55 # support for it), you can specify the separator character here. The format
56 # is then <username><separator><master username>. UW-IMAP uses "*" as the
57 # separator, so that could be a good choice.
58 #auth_master_user_separator =
60 # Username to use for users logging in with ANONYMOUS SASL mechanism
61 #auth_anonymous_username = anonymous
63 # Maximum number of dovecot-auth worker processes. They're used to execute
64 # blocking passdb and userdb queries (eg. MySQL and PAM). They're
65 # automatically created and destroyed as needed.
66 #auth_worker_max_count = 30
68 # Host name to use in GSSAPI principal names. The default is to use the
69 # name returned by gethostname(). Use "$ALL" (with quotes) to allow all keytab
71 #auth_gssapi_hostname =
73 # Kerberos keytab to use for the GSSAPI mechanism. Will use the system
74 # default (usually /etc/krb5.keytab) if not specified. You may need to change
75 # the auth service to run as root to be able to read this file.
78 # Do NTLM and GSS-SPNEGO authentication using Samba's winbind daemon and
79 # ntlm_auth helper. <doc/wiki/Authentication/Mechanisms/Winbind.txt>
80 #auth_use_winbind = no
82 # Path for Samba's ntlm_auth helper binary.
83 #auth_winbind_helper_path = /usr/bin/ntlm_auth
85 # Time to delay before replying to failed authentications.
86 #auth_failure_delay = 2 secs
88 # Require a valid SSL client certificate or the authentication fails.
89 #auth_ssl_require_client_cert = no
91 # Take the username from client's SSL certificate, using
92 # X509_NAME_get_text_by_NID() which returns the subject's DN's
94 #auth_ssl_username_from_cert = no
96 # Space separated list of wanted authentication mechanisms:
97 # plain login digest-md5 cram-md5 ntlm rpa apop anonymous gssapi otp skey
99 # NOTE: See also disable_plaintext_auth setting.
100 auth_mechanisms = plain login
103 ## Password and user databases
107 # Password database is used to verify user's password (and nothing more).
108 # You can have multiple passdbs and userdbs. This is useful if you want to
109 # allow both system users (/etc/passwd) and virtual users to login without
110 # duplicating the system users into virtual database.
112 # <doc/wiki/PasswordDatabase.txt>
114 # User database specifies where mails are located and what user/group IDs
115 # own them. For single-UID configuration use "static" userdb.
117 # <doc/wiki/UserDatabase.txt>
119 #!include auth-deny.conf.ext
120 #!include auth-master.conf.ext
122 #!include auth-system.conf.ext
123 !include auth-sql.conf.ext
124 #!include auth-ldap.conf.ext
125 #!include auth-passwdfile.conf.ext
126 #!include auth-checkpassword.conf.ext
127 #!include auth-static.conf.ext