Hi,

Dovecot 2.1.12 sends panic message when it tries to authenticate some users. Apparently because they use different authentication mechanisms on different email clients at the same time. For example, in debug logs this user uses CRAM-MD5, NTLM and PLAIN in account settings of his email clients. All passwords are stored in plain text (base64) in LDAP.

Please advise me what I can tweak to fix this issue ?

Nov 27 06:38:36 dovecot-1 auth: Error: ldap(gone@in.com.au,201.45.21.151,<qZlhoBnsvQDLLRuX>): Multiple password values not supported Nov 27 06:38:36 dovecot-1 auth: Panic: file passdb-ldap.c: line 95 (ldap_lookup_finish): assertion failed: (password == NULL || scheme != NULL) Nov 27 06:38:36 dovecot-1 auth: Error: ldap(gone@in.com.au,201.45.21.151,<qZlhoBnsvQDLLRuX>): Multiple password values not supported Nov 27 06:38:36 dovecot-1 auth: Error: Raw backtrace: /usr/local/dovecot/lib/dovecot/libdovecot.so.0(+0x485ca) [0x7f90ed51b5ca] -> /usr/local/dovecot/lib/dovecot/libdovecot.so.0(+0x48616) [0x7f90ed51b616] -> /usr/local/dovecot/lib/dovecot/libdovecot.so.0(i_error+0) [0x7f90ed4eeeef] -> dovecot-proxy/auth() [0x42967c] -> dovecot-proxy/auth() [0x428da1] -> /usr/local/dovecot/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x36) [0x7f90ed5277a6] -> /usr/local/dovecot/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0x9f) [0x7f90ed5287df] -> /usr/local/dovecot/lib/dovecot/libdovecot.so.0(io_loop_run+0x28) [0x7f90ed527748] -> /usr/local/dovecot/lib/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7f90ed513123] -> dovecot-proxy/auth(main+0x376) [0x41bd26] -> /lib/libc.so.6(__libc_start_main+0xfd) [0x7f90ec2d8c8d] -> dovecot-proxy/auth() [0x40d0f9] Nov 27 06:38:36 dovecot-1 auth: Error: Raw backtrace: /usr/local/dovecot/lib/dovecot/libdovecot.so.0(+0x485ca) [0x7f90ed51b5ca] -> /usr/local/dovecot/lib/dovecot/libdovecot.so.0(+0x48616) [0x7f90ed51b616] -> /usr/local/dovecot/lib/dovecot/libdovecot.so.0(i_error+0) [0x7f90ed4eeeef] -> dovecot-proxy/auth() [0x42967c] -> dovecot-proxy/auth() [0x428da1] -> /usr/local/dovecot/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x36) [0x7f90ed5277a6] -> /usr/local/dovecot/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0x9f) [0x7f90ed5287df] -> /usr/local/dovecot/lib/dovecot/libdovecot.so.0(io_loop_run+0x28) [0x7f90ed527748] -> /usr/local/dovecot/lib/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7f90ed513123] -> dovecot- proxy/auth(main+0x376) [0x41bd26] -> /lib/libc.so.6(__libc_start_main+0xfd) [0x7f90ec2d8c8d] -> dovecot-proxy/auth() [0x40d0f9] Nov 27 06:38:36 dovecot-1 director: Error: Auth server disconnected unexpectedly Nov 27 06:38:36 dovecot-1 auth: Fatal: master: service(auth): child 26841 killed with signal 6 (core dumps disabled)

This is LDAP configuration on one of director servers where clients are authenticated.

uris = ldap://ldap-node-2.mynetwork.net, ldap://ldap-node-3.mynetwork.net debug_level = 0 base = ou=email, dc=netregistry, dc=net

user_attrs = homeDirectory=home, uidNumber=uid, gidNumber=gid, mailQuotaSize=quota_rule=*:storage=%$ user_filter = (&(objectClass=nrPOPAccount)(uid=%u)) pass_attrs = uid=user, userPassword=password, =proxy=y, =destuser=%u, =pass=Secret456 pass_filter = (&(objectClass=nrPOPAccount)(uid=%u))

default_pass_scheme = PLAIN

Regards, Alexandr Sabitov System Administrator