Scott Silva wrote on Thu, 20 Nov 2008 16:03:04 -0800:
> CentOS 4 comes with a very OLD version of dovecot.
> If you are using dovecot, you can get a much newer version at atrpms.net.
> The upgrade might be all you need to fix it.
The dovecot in CentOS 5 exhibits the same problem when hammered by
Chris Heiner wrote on Thu, 20 Nov 2008 13:43:44 -0800:
> I get complaints about "the servers asking for username and password".
from your users or what? Of course, they may complain. A big dictionary
attack can take almost all the bandwidth for some time or leave a backlog
of dovecot instances.
Hi Chris,
You still did not give enough detail of what happens on the machine
when the problem strikes you. For instance:
- What is in /var/log/messages at that time?
- What is in "dmesg" output?
- What is in the log of your POP3 server (you still did not tell which
program you are using)?
- What
:07 PM
To: CentOS mailing list
Subject: Re: [CentOS] SYD flood dropped on Sendmail (centos 4.x)
Kai Schaetzl wrote:
> Chris Heiner wrote on Thu, 20 Nov 2008 08:48:50 -0800:
>
>> My firewall seems to block an attack my Centos / Sendmail boxes on port
110.
>
> port 110 is your PO
ble.
Thanks for any replies..
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf
Of Kai Schaetzl
Sent: Thursday, November 20, 2008 12:53 PM
To: centos@centos.org
Subject: Re: [CentOS] SYD flood dropped on Sendmail (centos 4.x)
Chris, you still didn't answer *why
Chris, you still didn't answer *why* you have to reboot them. What exactly
is the symptom that makes you think you have to reboot?
I assume now that with "My firewall says it's blocked" you referred to the
drops? (Next time say so, as this wording is really ambiguous.)
> What would you like to
John Hinton wrote:
Chris Heiner wrote:
My guys,
My firewall seems to block an attack my Centos / Sendmail boxes on
port 110. These servers require a reboot after each attack. My
firewall says it’s blocked? Do I need to patch something on sendmail?
Or is my firewall not doing its job (Sonicw
Chris Heiner wrote:
My guys,
My firewall seems to block an attack my Centos / Sendmail boxes on
port 110. These servers require a reboot after each attack. My
firewall says it’s blocked? Do I need to patch something on sendmail?
Or is my firewall not doing its job (Sonicwall)? This is not th
Kai Schaetzl wrote:
Chris Heiner wrote on Thu, 20 Nov 2008 08:48:50 -0800:
My firewall seems to block an attack my Centos / Sendmail boxes on port 110.
port 110 is your POP server, probably dovecot.
These servers require a reboot after each attack.
Because of what?
My firewall says it's
: [CentOS] SYD flood dropped on Sendmail (centos 4.x)
Chris Heiner wrote on Thu, 20 Nov 2008 08:48:50 -0800:
> My firewall seems to block an attack my Centos / Sendmail boxes on port
110.
port 110 is your POP server, probably dovecot.
> These servers require a reboot after each attack.
Because o
ly my Centos boxes as I have others that are not affect by it.
Does the help?
Thanks in advance.
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf
Of Kai Schaetzl
Sent: Thursday, November 20, 2008 11:31 AM
To: centos@centos.org
Subject: Re: [CentOS] SYD flood dropp
Chris Heiner wrote on Thu, 20 Nov 2008 08:48:50 -0800:
> My firewall seems to block an attack my Centos / Sendmail boxes on port 110.
port 110 is your POP server, probably dovecot.
> These servers require a reboot after each attack.
Because of what?
> My firewall says it's
> blocked?
I don't
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