Difference between pages "Linuxintro:About" and "Greylisting"

From Linuxintro
(Difference between pages)
(TlcPVZcJrS)
 
imported>ThorstenStaerk
 
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Holy sihnzit, this is so cool thank you.
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There are different tools for greylisting.
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= Postgrey =
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Postgrey is [[greyListing]] [[software]] for the [[postfix]] [[MTA]].
 +
 
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== How to get it ==
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Download postgrey from http://postgrey.schweikert.ch/
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== How to set it up ==
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* Extract your postgrey [[package]], e.g.:
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tar xvzf postgrey-1.32.tar.gz
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* install some needed packages
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yast -i perl-BerkeleyDB
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* Copy postgrey_whitelist_clients to /etc/postfix/
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* Copy postgrey_whitelist_recipients to /etc/postfix/
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* Add a user named postgrey:
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useradd -m postgrey
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* start postgrey
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./postgrey --inet 127.0.0.1:60000
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If you get an error, see ''TroubleShooting''.
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* make sure postgrey is listening on port 60000:
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<pre>
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$ nmap localhost -p59998-60002
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Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2007-08-10 07:44 CEST
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Interesting ports on lvps87-230-12-146.dedicated.hosteurope.de (127.0.0.1):
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PORT      STATE  SERVICE
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59998/tcp closed unknown
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59999/tcp closed unknown
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60000/tcp open  unknown
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60001/tcp closed unknown
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60002/tcp closed unknown
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Nmap finished: 1 IP address (1 host up) scanned in 0.049 seconds
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</pre>
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* Make sure there is a line like this in /etc/postfix/main.cf:
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smtpd_recipient_restrictions = permit_mynetworks,
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                                permit_sasl_authenticated,
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                                reject_unauth_destination,
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                                check_policy_service  inet:127.0.0.1:60000
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* restart postfix
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/etc/init.d/postfix restart
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= TroubleShooting =
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 +
'''Symptome:''' When starting postgrey, you get an error message
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Can't locate Net/Server.pm in @INC
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 +
'''Reason:''' Your perl is installed, but missing Net::Server
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'''Solution:''' Install Net::Server via [[cpan]]:
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perl -mCPAN -e CPAN::Shell
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If you have never run CPAN before, you have to answer 25 questions now. Then issue:
 +
install Net::Server
 +
 
 +
= See also =
 +
 
 +
http://www.debuntu.org/postfix-and-postgrey-a-proactive-approach-to-spam-filtering

Revision as of 10:31, 12 October 2008

There are different tools for greylisting.

Postgrey

Postgrey is greyListing software for the postfix MTA.

How to get it

Download postgrey from http://postgrey.schweikert.ch/

How to set it up

  • Extract your postgrey package, e.g.:
tar xvzf postgrey-1.32.tar.gz
  • install some needed packages
yast -i perl-BerkeleyDB
  • Copy postgrey_whitelist_clients to /etc/postfix/
  • Copy postgrey_whitelist_recipients to /etc/postfix/
  • Add a user named postgrey:
useradd -m postgrey
  • start postgrey
./postgrey --inet 127.0.0.1:60000

If you get an error, see TroubleShooting.

  • make sure postgrey is listening on port 60000:
$ nmap localhost -p59998-60002

Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2007-08-10 07:44 CEST
Interesting ports on lvps87-230-12-146.dedicated.hosteurope.de (127.0.0.1):
PORT      STATE  SERVICE
59998/tcp closed unknown
59999/tcp closed unknown
60000/tcp open   unknown
60001/tcp closed unknown
60002/tcp closed unknown

Nmap finished: 1 IP address (1 host up) scanned in 0.049 seconds
  • Make sure there is a line like this in /etc/postfix/main.cf:
smtpd_recipient_restrictions = permit_mynetworks,
                                permit_sasl_authenticated,
                                reject_unauth_destination,
                                check_policy_service  inet:127.0.0.1:60000
  • restart postfix
/etc/init.d/postfix restart

TroubleShooting

Symptome: When starting postgrey, you get an error message

Can't locate Net/Server.pm in @INC 

Reason: Your perl is installed, but missing Net::Server

Solution: Install Net::Server via cpan:

perl -mCPAN -e CPAN::Shell

If you have never run CPAN before, you have to answer 25 questions now. Then issue:

install Net::Server

See also

http://www.debuntu.org/postfix-and-postgrey-a-proactive-approach-to-spam-filtering