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fedora core - 2. 1. I started IMAP server ( dovecot ), apache , sendmail & used the webmail application ( squirrelmail ) to use mail services. After that, I ...
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  1. #1
    Just Joined!
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    india
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    updated timestamp


    fedora core - 2.

    1.
    I started IMAP server ( dovecot ), apache , sendmail & used the webmail application ( squirrelmail ) to use mail services. After that, I have been getting some strange messages in my logfiles which are described in the following paragraph :

    userhelper[6193]: pam_timestamp: updated timestamp file `/var/run/sudo/root/unknown'
    userhelper[6224]: running '/usr/share/system-config-users/system-config-users' with
    root privileges on behalf of 'root'
    dovecot-auth: pam_succeed_if: requirement "uid < 100" not met by user "user1
    "
    what exactly is this ??
    2.
    when i run
    # mail
    the following message appears....


    ################### LogWatch 5.1 (02/03/04) ####################
    Processing Initiated: Tue May 10 10:23:42 2005
    Date Range Processed: yesterday
    Detail Level of Output: 0
    Logfiles for Host: <hostname>
    ################################################## ##############

    --------------------- httpd Begin ------------------------

    A total of 2 sites probed the server
    216.208.86.75
    61.157.198.134

    A total of 2 unidentified 'other' records logged
    CONNECT msa.hinet.net:25 HTTP/1.0 with response code(s) 405 405 405
    CONNECT 65.54.190.179:25 HTTP/1.1 with response code(s) 405

    ---------------------- httpd End -------------------------




    who is probing my server & why ??

  2. #2
    Just Joined!
    Join Date
    Jun 2009
    Posts
    2
    i can add 2 cents about the following row:

    "dovecot-auth: pam_succeed_if: requirement "uid < 100" not met by user "user1""

    each program in linux do not provide authentication itself, it uses pam for this.

    there are numerous files in /etc/pam.d/ , they describe to pam how to do authentication in some particular case. in each file there are several rows. each row is a condition for successfull authentication overall.

    you can find the following row in/etc/pam.d/system-auth

    account sufficient /lib/security/$ISA/pam_succeded_if.so uid < 100

    the point is the row has option "sufficient". it means if condition in the row = true then authentication process is treated as successfull and pam does not check below rows, BUT if condition = false then authentication is not treated as failed, no- pam just notifies in log file that condition is false

    pam_succeed_if: requirement "uid < 100" not met by user

    and continue checking other rows laying below.

    so

    "dovecot-auth: pam_succeed_if: requirement "uid < 100" not met by user "user1""

    is just notification that user1 has uid < 100 and nothing else

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