Difference between revisions of "Greylisting"
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= Postgrey = | = Postgrey = | ||
| − | Postgrey is [[ | + | Postgrey is [[greylisting]] software for the postfix [[MTA]]. |
== How to get it == | == How to get it == | ||
| Line 12: | Line 12: | ||
* Extract your postgrey [[package]], e.g.: | * Extract your postgrey [[package]], e.g.: | ||
tar xvzf postgrey-1.32.tar.gz | 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_clients to /etc/postfix/ | ||
* Copy postgrey_whitelist_recipients to /etc/postfix/ | * Copy postgrey_whitelist_recipients to /etc/postfix/ | ||
* Add a user named postgrey: | * Add a user named postgrey: | ||
useradd -m postgrey | useradd -m postgrey | ||
| + | * Add a directory for the lock file: | ||
| + | mkdir /var/spool/postfix/postgrey | ||
| + | chmod 777 /var/spool/postfix/postgrey | ||
* start postgrey | * start postgrey | ||
./postgrey --inet 127.0.0.1:60000 | ./postgrey --inet 127.0.0.1:60000 | ||
| Line 42: | Line 47: | ||
/etc/init.d/postfix restart | /etc/init.d/postfix restart | ||
| − | = TroubleShooting = | + | == TroubleShooting == |
'''Symptome:''' When starting postgrey, you get an error message | '''Symptome:''' When starting postgrey, you get an error message | ||
| Line 51: | Line 56: | ||
'''Solution:''' Install Net::Server via [[cpan]]: | '''Solution:''' Install Net::Server via [[cpan]]: | ||
perl -mCPAN -e CPAN::Shell | perl -mCPAN -e CPAN::Shell | ||
| + | If you have never run CPAN before, you have to answer 25 questions now. Then issue: | ||
install Net::Server | install Net::Server | ||
Latest revision as of 17:50, 3 March 2013
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
- Add a directory for the lock file:
mkdir /var/spool/postfix/postgrey chmod 777 /var/spool/postfix/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
