login failed when try to connect to mail server
recently we had a problem for some of our users, they claim that they cannot login to our mail server either using outlook express/thunderbird or using our squirrelmail. we are using sendmail-8.12.8-9.90 on redhat 9 (dell 2650), imap-2004c1(washington imap). i check the logs and found this:
Apr 7 08:59:00 act-naim ipop3d: Logout user= host=
Apr 7 09:03:54 act-naim pop(pam_unix): authentication failure; logname= uid=0 euid=0 tty= ruser= rhost= user=
Apr 7 09:03:57 act-naim ipop3d: Login failed user= auth =host=
Apr 7 09:04:00 act-naim ipop3d: Logout user=host=
Apr 7 09:05:11 act-naim imap(pam_unix): authentication failure; logname= uid=0 euid=0 tty= ruser= rhost= user=
Apr 7 09:05:13 act-naim imapd: Login failed user=auth=host=
Apr 7 09:05:16 act-naim imapd: Command stream end of file, while reading line user= host=
Apr 7 09:07:43 act-naim sshd(pam_unix): session opened for user root by (uid=0)
Apr 7 09:08:54 act-naim pop(pam_unix): authentication failure; logname= uid=0 euid=0 tty= ruser= rhost=10.24.1.60 user=
Apr 7 09:08:57 act-naim ipop3d: Login failed user=auth=host=
Apr 7 09:09:00 act-naim ipop3d: Logout user=host=
fyi, we had migrate from our solaris to linux 3 weeks ago. i just copied passwd and shadow and it works...unfortunately this weeks i has received many calls from our users, they claim they cannot connect (unknown user/password incorrect). they try many times before they can connect to our mail server.
is there any problem with the PAM or our imap connection is not stable? please help...