Difference between pages "Linuxintro:About" and "Greylisting"
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− | + | There are different tools for greylisting. | |
− | = How | + | = 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: | ||
+ | <pre> | ||
+ | $ 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 | ||
+ | </pre> | ||
+ | * 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 |
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