[Kolab-devel] Kolab 2.1 - Possibile DOS?

[Gunnar Wrobel]

"gelpi at corona.it" <corona at gelpi.it> writes:

> Hi,
>     too often my kolab 2.1 beta 3 installation stop working.
> what happens is that during kolab daily cron activity some component 
> shut down and does not restart or ldap stop responding.
>
> The result is that mail server stops.
>
> This night I forget my thunderbird open and polling every 5 minutes 6 
> mailboxes.
> At midnight kolab stop working with a message error of temporary lookup 
> failure.
> In postfix.sum  I found this lines:
>
>         1   77F5C6C345: virtual_alias_maps map lookup problem for 
> gelpi at mydomain.it
>          1   dict_ldap_connect: Unable to bind to server 
> ldap://127.0.0.1:389 as cn=nobody,cn=internal,dc=mydomain,dc=it: -1 
> (Can't contact LDAP server)
>   pickup (total: 1)
>          1   maildrop/77FA76C33B: Error writing message file
>   postfix-script (total: 30)
>
> In the lines above I change the real domain.
>
> The solution is to restart kolab with /kolab/etc/rc all restart
>
> I try to cron the last command at 1 o'clock, but if there is a client 
> open it simply stop kolab.
>
> This problem aries upgrading from beta 1 to beta 2. I upgrade to beta 3 
> but this does not resolve it.
>
> I'll upgrade to beta 4 as soon as possible.
>
> I add also this information. My sasl log is full of lines
>
> <debug> saslauthd[14596]: ldap_simple_bind() failed -1 (Can't contact LDAP server).
>  <info> saslauthd[14596]: Retrying authentication
>  <debug> saslauthd[14596]: ldap_simple_bind() failed -1 (Can't contact LDAP server).
>  <info> saslauthd[14596]: Retrying authentication
>  <debug> saslauthd[14588]: ldap_simple_bind() failed -1 (Can't contact LDAP server).
>  <info> saslauthd[14588]: Retrying authentication
>  <debug> saslauthd[14588]: ldap_simple_bind() failed -1 (Can't contact LDAP server).
>  <info> saslauthd[14588]: Retrying authentication
>  <debug> saslauthd[14596]: ldap_simple_bind() failed -1 (Can't contact LDAP server).
>  <info> saslauthd[14596]: Retrying authentication
>
> I install kolab one year ago using the december 15 snapshot. After that I upgrade to beta 1, then to beta 2 and to beta 3.
>
> I urgently need some help to investigate this problem and find a solution.

Check if you have a problem with random number generation. See
http://wiki.kolab.org/index.php/Timeout_problems

Cheers,
Gunnar

-- 
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