SASL fail to authenticated remote user

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#1 Sat, 08/04/2012 - 18:35
adrianmak

SASL fail to authenticated remote user

CentOS 5.5

I read many posts regarding postfix+sasl on the net but no clue. The maillog messages are

Aug  5 07:00:56 host2 postfix/smtpd[10018]: warning: SASL authentication failure: Password verification failed
Aug  5 07:00:56 host2 postfix/smtpd[10018]: warning: localhost.localdomain[127.0.0.1]: SASL PLAIN authentication failed: authentication failure

telnet localhost 25

# telnet localhost 25
Trying 127.0.0.1...
Connected to localhost.localdomain (127.0.0.1).
Escape character is '^]'.
220 xxx.xxxxxxxxxxx.net ESMTP Postfix
ehlo me
250-xxx.xxxxxxxxxxx.net
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250-AUTH LOGIN PLAIN
250-AUTH=LOGIN PLAIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN

/usr/lib/sasl2/smtpd.conf

pwcheck_method: saslauthd
mech_list: PLAIN LOGIN

/etc/sysconfig/saslauthd

# Directory in which to place saslauthd's listening socket, pid file, and so
# on.  This directory must already exist.
SOCKETDIR=/var/run/saslauthd

# Mechanism to use when checking passwords.  Run "saslauthd -v" to get a list
# of which mechanism your installation was compiled with the ablity to use.
MECH=pam

# Additional flags to pass to saslauthd on the command line.  See saslauthd(8)
# for the list of accepted flags.
FLAGS=

postconf -n

alias_database = hash:/etc/postfix/aliases
alias_maps = hash:/etc/postfix/aliases
broken_sasl_auth_clients = yes
command_directory = /usr/sbin
config_directory = /etc/postfix
daemon_directory = /usr/libexec/postfix
data_directory = /var/lib/postfix
debug_peer_level = 2
home_mailbox = Maildir/
html_directory = /usr/share/doc/postfix-2.6.7-documentation/html
inet_interfaces = all
mail_owner = postfix
mailbox_command = /usr/bin/procmail-wrapper -o -a $DOMAIN -d $LOGNAME
mailq_path = /usr/bin/mailq.postfix
manpage_directory = /usr/share/man
mydestination = $myhostname, localhost.$mydomain, localhost, yyy.yyyhost.com
newaliases_path = /usr/bin/newaliases.postfix
queue_directory = /var/spool/postfix
readme_directory = /usr/share/doc/postfix-2.6.7-documentation/readme
sample_directory = /etc/postfix
sender_bcc_maps = hash:/etc/postfix/bcc
sendmail_path = /usr/sbin/sendmail.postfix
setgid_group = postdrop
smtpd_recipient_restrictions = permit_mynetworks permit_sasl_authenticated reject_unauth_destination
smtpd_sasl_auth_enable = yes
smtpd_sasl_security_options = noanonymous
unknown_local_recipient_reject_code = 550
virtual_alias_maps = hash:/etc/postfix/virtual

any direction to debug the problem of sasl authentication failure ?

my username creation pattern is username.domain

Sat, 08/04/2012 - 19:18
adrianmak

This server is ran for a few years and guy who managed this server was quit and I could not got much information from other colleagues.

I installed centos 5.8 and virtualmin on a virtual machine, sasl ran properly out of the box without special configuration.

When I compared the configurations files from them. Here are what my findings.

  1. the postfix version is different. The VM is 2.3.3, the production server is 2.6.7

  2. the postconf -n more or less are the same accept two lines production server

alias_database = hash:/etc/postfix/aliases
alias_maps = hash:/etc/postfix/aliases

VM

alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
Sun, 08/05/2012 - 02:31
adrianmak

I just used a utility called saslfinger to list sasl configuration http://postfix.state-of-mind.de/patrick.koetter/saslfinger/

There is a different of master.cf between production and virtual machine box

production

saslfinger -s
saslfinger - postfix Cyrus sasl configuration Sun Aug  5 15:16:53 HKT 2012
version: 1.0.2
mode: server-side SMTP AUTH

-- basics --
Postfix: 2.6.7-20100608
System: CentOS release 5.5 (Final)

-- smtpd is linked to --
        libsasl2.so.2 => /usr/lib/libsasl2.so.2 (0x004be000)

-- active SMTP AUTH and TLS parameters for smtpd --
broken_sasl_auth_clients = yes
smtpd_sasl_auth_enable = yes
smtpd_sasl_security_options = noanonymous


-- listing of /usr/lib/sasl2 --
total 3256
drwxr-xr-x  2 root root   4096 Mar 16  2011 .
drwxr-xr-x 88 root root  45056 Jan 17  2011 ..
-rwxr-xr-x  1 root root    884 Mar 17  2010 libanonymous.la
-rwxr-xr-x  1 root root  14372 Mar 17  2010 libanonymous.so
-rwxr-xr-x  1 root root  14372 Mar 17  2010 libanonymous.so.2
-rwxr-xr-x  1 root root  14372 Mar 17  2010 libanonymous.so.2.0.22
-rwxr-xr-x  1 root root    870 Mar 17  2010 libcrammd5.la
-rwxr-xr-x  1 root root  16832 Mar 17  2010 libcrammd5.so
-rwxr-xr-x  1 root root  16832 Mar 17  2010 libcrammd5.so.2
-rwxr-xr-x  1 root root  16832 Mar 17  2010 libcrammd5.so.2.0.22
-rwxr-xr-x  1 root root    893 Mar 17  2010 libdigestmd5.la
-rwxr-xr-x  1 root root  47172 Mar 17  2010 libdigestmd5.so
-rwxr-xr-x  1 root root  47172 Mar 17  2010 libdigestmd5.so.2
-rwxr-xr-x  1 root root  47172 Mar 17  2010 libdigestmd5.so.2.0.22
-rwxr-xr-x  1 root root    933 Mar 17  2010 libgssapiv2.la
-rwxr-xr-x  1 root root  26496 Mar 17  2010 libgssapiv2.so
-rwxr-xr-x  1 root root  26496 Mar 17  2010 libgssapiv2.so.2
-rwxr-xr-x  1 root root  26496 Mar 17  2010 libgssapiv2.so.2.0.22
-rwxr-xr-x  1 root root    856 Mar 17  2010 liblogin.la
-rwxr-xr-x  1 root root  14752 Mar 17  2010 liblogin.so
-rwxr-xr-x  1 root root  14752 Mar 17  2010 liblogin.so.2
-rwxr-xr-x  1 root root  14752 Mar 17  2010 liblogin.so.2.0.22
-rwxr-xr-x  1 root root    856 Mar 17  2010 libplain.la
-rwxr-xr-x  1 root root  14848 Mar 17  2010 libplain.so
-rwxr-xr-x  1 root root  14848 Mar 17  2010 libplain.so.2
-rwxr-xr-x  1 root root  14848 Mar 17  2010 libplain.so.2.0.22
-rwxr-xr-x  1 root root    930 Mar 17  2010 libsasldb.la
-rwxr-xr-x  1 root root 905200 Mar 17  2010 libsasldb.so
-rwxr-xr-x  1 root root 905200 Mar 17  2010 libsasldb.so.2
-rwxr-xr-x  1 root root 905200 Mar 17  2010 libsasldb.so.2.0.22
-rw-r--r--  1 root root     25 Mar 31  2010 Sendmail.conf
-rw-r--r--  1 root root     49 Jan 14  2011 smtpd.conf

-- listing of /etc/sasl2 --
total 24
drwxr-xr-x   2 root root  4096 Mar 17  2010 .
drwxr-xr-x 107 root root 12288 Aug  5 14:06 ..




-- content of /usr/lib/sasl2/smtpd.conf --
pwcheck_method: saslauthd
mech_list: PLAIN LOGIN


-- active services in /etc/postfix/master.cf --
# service type  private unpriv  chroot  wakeup  maxproc command + args
#               (yes)   (yes)   (yes)   (never) (100)
smtp    inet    n       -       n       -       -       smtpd -o smtpd_sasl_auth_enable=yes
submission inet n       -       n       -       -       smtpd
  -o smtpd_tls_security_level=encrypt
smtps     inet  n       -       n       -       -       smtpd
  -o smtpd_tls_wrappermode=yes
pickup    fifo  n       -       n       60      1       pickup
cleanup   unix  n       -       n       -       0       cleanup
qmgr      fifo  n       -       n       300     1       qmgr
tlsmgr    unix  -       -       n       1000?   1       tlsmgr
rewrite   unix  -       -       n       -       -       trivial-rewrite
bounce    unix  -       -       n       -       0       bounce
defer     unix  -       -       n       -       0       bounce
trace     unix  -       -       n       -       0       bounce
verify    unix  -       -       n       -       1       verify
flush     unix  n       -       n       1000?   0       flush
proxymap  unix  -       -       n       -       -       proxymap
proxywrite unix -       -       n       -       1       proxymap
smtp      unix  -       -       n       -       -       smtp
relay     unix  -       -       n       -       -       smtp
        -o smtp_fallback_relay=
showq     unix  n       -       n       -       -       showq
error     unix  -       -       n       -       -       error
retry     unix  -       -       n       -       -       error
discard   unix  -       -       n       -       -       discard
local     unix  -       n       n       -       -       local
virtual   unix  -       n       n       -       -       virtual
lmtp      unix  -       -       n       -       -       lmtp
anvil     unix  -       -       n       -       1       anvil
scache    unix  -       -       n       -       1       scache

-- mechanisms on localhost --
250-AUTH LOGIN PLAIN
250-AUTH=LOGIN PLAIN


-- end of saslfinger output --

virtual machine box

saslfinger  -s
saslfinger - postfix Cyrus sasl configuration Sun Aug  5 15:17:22 HKT 2012
version: 1.0.2
mode: server-side SMTP AUTH

-- basics --
Postfix: 2.3.3
System: CentOS release 5.8 (Final)

-- smtpd is linked to --
        libsasl2.so.2 => /usr/lib/libsasl2.so.2 (0x00c71000)

-- active SMTP AUTH and TLS parameters for smtpd --
broken_sasl_auth_clients = yes
smtpd_sasl_auth_enable = yes
smtpd_sasl_security_options = noanonymous


-- listing of /usr/lib/sasl --
total 52
drwxr-xr-x  2 root root  4096 Aug  5 11:04 .
drwxr-xr-x 84 root root 45056 Aug  5 11:04 ..

-- listing of /usr/lib/sasl2 --
total 3260
drwxr-xr-x  2 root root   4096 Aug  5 11:04 .
drwxr-xr-x 84 root root  45056 Aug  5 11:04 ..
-rwxr-xr-x  1 root root    884 Mar 17  2010 libanonymous.la
-rwxr-xr-x  1 root root  14372 Mar 17  2010 libanonymous.so
-rwxr-xr-x  1 root root  14372 Mar 17  2010 libanonymous.so.2
-rwxr-xr-x  1 root root  14372 Mar 17  2010 libanonymous.so.2.0.22
-rwxr-xr-x  1 root root    870 Mar 17  2010 libcrammd5.la
-rwxr-xr-x  1 root root  16832 Mar 17  2010 libcrammd5.so
-rwxr-xr-x  1 root root  16832 Mar 17  2010 libcrammd5.so.2
-rwxr-xr-x  1 root root  16832 Mar 17  2010 libcrammd5.so.2.0.22
-rwxr-xr-x  1 root root    893 Mar 17  2010 libdigestmd5.la
-rwxr-xr-x  1 root root  47172 Mar 17  2010 libdigestmd5.so
-rwxr-xr-x  1 root root  47172 Mar 17  2010 libdigestmd5.so.2
-rwxr-xr-x  1 root root  47172 Mar 17  2010 libdigestmd5.so.2.0.22
-rwxr-xr-x  1 root root    933 Mar 17  2010 libgssapiv2.la
-rwxr-xr-x  1 root root  26496 Mar 17  2010 libgssapiv2.so
-rwxr-xr-x  1 root root  26496 Mar 17  2010 libgssapiv2.so.2
-rwxr-xr-x  1 root root  26496 Mar 17  2010 libgssapiv2.so.2.0.22
-rwxr-xr-x  1 root root    856 Mar 17  2010 liblogin.la
-rwxr-xr-x  1 root root  14752 Mar 17  2010 liblogin.so
-rwxr-xr-x  1 root root  14752 Mar 17  2010 liblogin.so.2
-rwxr-xr-x  1 root root  14752 Mar 17  2010 liblogin.so.2.0.22
-rwxr-xr-x  1 root root    856 Mar 17  2010 libplain.la
-rwxr-xr-x  1 root root  14848 Mar 17  2010 libplain.so
-rwxr-xr-x  1 root root  14848 Mar 17  2010 libplain.so.2
-rwxr-xr-x  1 root root  14848 Mar 17  2010 libplain.so.2.0.22
-rwxr-xr-x  1 root root    930 Mar 17  2010 libsasldb.la
-rwxr-xr-x  1 root root 905200 Mar 17  2010 libsasldb.so
-rwxr-xr-x  1 root root 905200 Mar 17  2010 libsasldb.so.2
-rwxr-xr-x  1 root root 905200 Mar 17  2010 libsasldb.so.2.0.22
-rw-r--r--  1 root root     25 Aug 12  2011 Sendmail.conf
-rw-r--r--  1 root root     49 Aug  4 15:32 smtpd.conf
-rw-r--r--  1 root root     49 Aug  4 14:37 smtpd.conf.rpmnew

-- listing of /etc/sasl2 --
total 24
drwxr-xr-x  2 root root  4096 Mar 17  2010 .
drwxr-xr-x 98 root root 12288 Aug  5 15:10 ..




-- content of /usr/lib/sasl2/smtpd.conf --
pwcheck_method: saslauthd
mech_list: PLAIN LOGIN


-- active services in /etc/postfix/master.cf --
# service type  private unpriv  chroot  wakeup  maxproc command + args
#               (yes)   (yes)   (yes)   (never) (100)
smtp    inet    n       -       n       -       -       smtpd -o smtpd_sasl_auth_enable=yes
submission inet n       -       n       -       -       smtpd
smtps     inet  n       -       n       -       -       smtpd
pickup    fifo  n       -       n       60      1       pickup
cleanup   unix  n       -       n       -       0       cleanup
qmgr      fifo  n       -       n       300     1       qmgr
tlsmgr    unix  -       -       n       1000?   1       tlsmgr
rewrite   unix  -       -       n       -       -       trivial-rewrite
bounce    unix  -       -       n       -       0       bounce
defer     unix  -       -       n       -       0       bounce
trace     unix  -       -       n       -       0       bounce
verify    unix  -       -       n       -       1       verify
flush     unix  n       -       n       1000?   0       flush
proxymap  unix  -       -       n       -       -       proxymap
smtp      unix  -       -       n       -       -       smtp
relay     unix  -       -       n       -       -       smtp
        -o fallback_relay=
showq     unix  n       -       n       -       -       showq
error     unix  -       -       n       -       -       error
discard   unix  -       -       n       -       -       discard
local     unix  -       n       n       -       -       local
virtual   unix  -       n       n       -       -       virtual
lmtp      unix  -       -       n       -       -       lmtp
anvil     unix  -       -       n       -       1       anvil
scache    unix  -       -       n       -       1       scache
maildrop  unix  -       n       n       -       -       pipe
  flags=DRhu user=vmail argv=/usr/local/bin/maildrop -d ${recipient}
old-cyrus unix  -       n       n       -       -       pipe
  flags=R user=cyrus argv=/usr/lib/cyrus-imapd/deliver -e -m ${extension} ${user}
cyrus     unix  -       n       n       -       -       pipe
  user=cyrus argv=/usr/lib/cyrus-imapd/deliver -e -r ${sender} -m ${extension} ${user}
uucp      unix  -       n       n       -       -       pipe
  flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient)
ifmail    unix  -       n       n       -       -       pipe
  flags=F user=ftn argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient)
bsmtp     unix  -       n       n       -       -       pipe
  flags=Fq. user=foo argv=/usr/local/sbin/bsmtp -f $sender $nexthop $recipient

-- mechanisms on localhost --
250-AUTH LOGIN PLAIN
250-AUTH=LOGIN PLAIN


-- end of saslfinger output --

As we can see there are options are comment out in master.cf in virtual machine box
Topic locked