W dniu 29.07.2009 22:01, Natalio Gatti pisze:
Maybe I didn'y explain myself. The infected user sends spam using my
mail server.
Maybe your server is hacked. :(
You should check logs, directories with write permission for all. There
are many dictionary attacks on ports ssh and pop3. Check
Natalio Gatti wrote:
Hi List.
I'm having an intermitten virus problem. From time to time a user gets
infected with a virus/worm that send tons of spam through the server.
All users are behind a NAT, so I can't know exactly which user/PC is
the source of the problem.
How can I minimize this
Maybe I didn'y explain myself. The infected user sends spam using my mail
server.
Maybe your server is hacked. :(
You should check logs, directories with write permission for all. There are
many dictionary attacks on ports ssh and pop3. Check ssh daemon (if you're
hacked you probably
Hi List.
I'm having an intermitten virus problem. From time to time a user gets
infected with a virus/worm that send tons of spam through the server. All
users are behind a NAT, so I can't know exactly which user/PC is the source
of the problem.
How can I minimize this problem?
Natalio
W dniu 29.07.2009 19:46, Natalio Gatti pisze:
Hi List.
I'm having an intermitten virus problem. From time to time a user gets
infected with a virus/worm that send tons of spam through the server.
All users are behind a NAT, so I can't know exactly which user/PC is
the source of the problem.
On Wed, Jul 29, 2009 at 3:28 PM, Aleksander Podsiadly
a...@westside.kielce.pl wrote:
W dniu 29.07.2009 19:46, Natalio Gatti pisze:
Hi List.
I'm having an intermitten virus problem. From time to time a user gets
infected with a virus/worm that send tons of spam through the server. All
users
Block and log with iptables.
Ricardo Barros
Manaus - AM - Brazil
2009/7/29 Aleksander Podsiadly a...@westside.kielce.pl
W dniu 29.07.2009 19:46, Natalio Gatti pisze:
Hi List.
I'm having an intermitten virus problem. From time to time a user gets
infected with a virus/worm
does
not have access to the credentials to authenticate.)
VD
From: Natalio Gatti [mailto:nga...@gmail.com]
Sent: Wednesday, July 29, 2009 1:46 PM
To: qmailtoaster-list@qmailtoaster.com
Subject: [qmailtoaster] Virus problem
Hi List.
I'm having an intermitten virus problem. From time
2009/7/29 RICARDO BARROS ricardo.barros...@gmail.com
Block and log with iptables.
From my server point of view, I see a single IP address (rememeber that the
clients are behind NAT), so I can not control number of simultaneous
connectios.
]
*Sent:* Wednesday, July 29, 2009 1:46 PM
*To:* qmailtoaster-list@qmailtoaster.com
*Subject:* [qmailtoaster] Virus problem
Hi List.
I'm having an intermitten virus problem. From time to time a user gets
infected with a virus/worm that send tons of spam through the server. All
users are behind
W dniu 29.07.2009 20:39, Natalio Gatti pisze:
I saw your post, but using a proxy does not seem to be a solution for
me. I already scan mails with clamav and spamassassin. I don't see
which other benefits brings up to use that proxy.
The spam sent by the infected machine does not contains
On Wed, Jul 29, 2009 at 4:50 PM, Aleksander Podsiadly
a...@westside.kielce.pl wrote:
W dniu 29.07.2009 20:39, Natalio Gatti pisze:
I saw your post, but using a proxy does not seem to be a solution for me. I
already scan mails with clamav and spamassassin. I don't see which other
benefits
I highly recommend to force the users to use Submission-Port 587 instead of
SMTP, which forces senders to authenticate against the server. Most
spam-senders do not have credentials for sending. In case they have, you can
simply locate the spam originators (and block them)
Johannes
Am
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