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  #1  
Old 25th May 2008, 19:34
vaio1 vaio1 is offline
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Cool Captcha System Solution for the SPAM problem

Hi Guys,

I need to know if is possible create a simple web interface with Black List - White List and Captcha authentication for the users to avoid the Spam problem.

Thanks
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  #2  
Old 25th May 2008, 20:33
till till is offline
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In my opinion, these systems are completely unusable. Users will not be able to do things like online shopping, mailing lists, forum registartions and many other things which require a double opt in anymore.

Instead of using such a system, you should setup a well maintained spamassassin integrated with amavisd and DNS blacklists. I use such a system for my accounts, I get about 500 - 600 emails a day, about 80 - 90% of them is spam and just a single spam message every few days gets trough the filters.
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  #3  
Old 25th May 2008, 21:46
vaio1 vaio1 is offline
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The problem remains the same, write a simple and immediate guide stap by step for all people who need a perfect configuration.

Let me know something about your solution.

This is my local.cf
Code:
# This is the right place to customize your installation of SpamAssassin.
#
# See 'perldoc Mail::SpamAssassin::Conf' for details of what can be
# tweaked.
#
# Only a small subset of options are listed below
#
###########################################################################

#   Add *****SPAM***** to the Subject header of spam e-mails
#
# rewrite_header Subject *****SPAM*****


#   Save spam messages as a message/rfc822 MIME attachment instead of
#   modifying the original message (0: off, 2: use text/plain instead)
#
# report_safe 1


#   Set which networks or hosts are considered 'trusted' by your mail
#   server (i.e. not spammers)
#
# trusted_networks 212.17.35.


#   Set file-locking method (flock is not safe over NFS, but is faster)
#
# lock_method flock


#   Set the threshold at which a message is considered spam (default: 5.0)
#
# required_score 5.0


#   Use Bayesian classifier (default: 1)
#
# use_bayes 1


#   Bayesian classifier auto-learning (default: 1)
#
# bayes_auto_learn 1


#   Set headers which may provide inappropriate cues to the Bayesian
#   classifier
#
# bayes_ignore_header X-Bogosity
# bayes_ignore_header X-Spam-Flag
# bayes_ignore_header X-Spam-Status

Last edited by vaio1; 25th May 2008 at 22:04.
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  #4  
Old 26th May 2008, 07:47
onastvar onastvar is offline
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Question well maintained spamassassin integrated with amavisd and DNS blacklists

Is there a guide on how to setup well maintained spamassassin integrated with amavisd and DNS blacklists. Please advise?

Quote:
Originally Posted by till View Post
Instead of using such a system, you should setup a well maintained spamassassin integrated with amavisd and DNS blacklists. I use such a system for my accounts, I get about 500 - 600 emails a day, about 80 - 90% of them is spam and just a single spam message every few days gets trough the filters.
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  #5  
Old 26th May 2008, 10:57
till till is offline
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Basically a setup like this should work well:

http://www.howtoforge.com/virtual-us...ail-ubuntu8.04

combined with these additional postfix settings:

http://www.howtoforge.com/block_spam..._level_postfix

You can use this setup e.g. as dedicated spam server in front of your normal mailservers by forwarding the emails after the scanning process with postfix transports.

Another way is to use ispconfig 3

http://www.howtoforge.com/forums/showthread.php?t=22788

as it sets up the virtual server setup automatically during installation and offers a easy to use interface and the ability to maintain different antispam scorings and per domain or even per email address, you will just have to add razor, pyzor, dcc and the blacklists as described in the howtos above.
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  #6  
Old 26th May 2008, 20:43
onastvar onastvar is offline
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I already have server with ISPConfig Version: 2.2.23 with 10 domains and I've already did a setup from link below, somehow many emails still get lots of SPAM.

http://www.howtoforge.com/block_spam..._level_postfix

What other approach I can take to block the SPAM on already installed CentOS 5.1 with ISPConfig 2.2.23?
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  #7  
Old 26th May 2008, 21:20
till till is offline
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Install razor, pyzor and dcc. spamassassin will use them automatically, when they are installed.
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Get ISPConfig support and the ISPConfig 3 manual from ispconfig.org.
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  #8  
Old 27th May 2008, 06:25
onastvar onastvar is offline
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I found how to install razor, pyzor and dcc (link below) but this is with amavisd which I don't think I have. Do I need amavisd? How do I install razor, pyzor and dcc w/o amavisd?

http://www.howtoforge.com/virtual-us...l-centos5.1-p4
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  #9  
Old 27th May 2008, 09:05
till till is offline
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Quote:
Do I need amavisd? How do I install razor, pyzor and dcc w/o amavisd?
you dont need amavisd. The installation with and without amavisd is the same.
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Get ISPConfig support and the ISPConfig 3 manual from ispconfig.org.
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onastvar (27th May 2008)
  #10  
Old 27th May 2008, 09:05
till till is offline
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Quote:
Do I need amavisd? How do I install razor, pyzor and dcc w/o amavisd?
you dont need amavisd. The installation with and without amavisd is the same.
__________________
Till Brehm
--
Get ISPConfig support and the ISPConfig 3 manual from ispconfig.org.
Reply With Quote
The Following User Says Thank You to till For This Useful Post:
onastvar (27th May 2008)
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