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policyd-weight(8) System Manager's Manual policyd-weight(8) NAME policyd-weight - weighted SMTP policy daemon STATUS Beta, Documentation incomplete SYNOPSIS policyd-weight [-option] [-option2 <arg>] command DESCRIPTION policyd-weight(8) is a SMTP policy daemon written in perl(1) for post- fix(1). It evaluates based on RBL/RHSBL results, HELO and MAIL FROM do- main and subdomain arguments and the client IP address the possibility of forgery or SPAM. It is designed to be called before the SMTP DATA command at the RCPT TO stage. This way it is a) possible to reject a mail attempt before the body has been received and b) to keep multire- cipient mail intact, i.e. provide the functionality of selective usage based on recipients. To make policyd-weight(8) work with postfix(1), it is required to add a system account for $USER (default: polw) Policyd-weight can operate in master.cf or daemon mode. In master.cf mode it uses postfix' spawn(8), which results in number of simultanous requests perl instances. In daemon mode it uses shared memory and forks on load, and only if all childs are busy. At the time of writing the man-pages for policyd-weight assume a post- fix installation. It has been reported that policyd-weight works with other MTAs like Exim, too. SETUP master.cf mode: master.cf: policy unix - n n - - spawn user=polw argv=/usr/bin/perl /usr/local/bin/policyd-weight main.cf: smtpd_recipient_restrictions = permit_mynetworks, ... authenticated permits ... reject_unauth_destination, ... whitelists, role accounts, clients ... check_policy_service unix:private/policy daemon mode: start the daemon with policyd-weight start. Poliyd-weight then listens on $TCP_PORT (default: 12525) for policy requests. To make postfix talk to that port do following changes to main.cf: main.cf: smtpd_recipient_restrictions = permit_mynetworks, ... authenticated permits ... reject_unauth_destination, ... whitelists, role accounts, clients ... check_policy_service inet:127.0.0.1:12525 It is possible to have more than one postfix server talk to the daemo- nized policyd-weight by configuring each postfix machine to query the policy server with check_policy_service inet:IP:12525 where IP is the host on which policyd-weight runs. Please note that check_policy_service should come at last, or at least after reject_unauth_destination, or else you may become an open relay. COMMANDS Following commands exist and are reserved for daemon mode only: start start the policy server stop stop the policy server restart restart the policy server reload tells the policy server to reload its configuration defaults prints the default settings to STDOUT and exits OPTIONS -d operate in debug mode Not for use in master.cf. In debug mode everything is reported on STDOUT instead of syslog(3). Also an own debug cache daemon will be spawned. The socket-file is named after the value of $SPATH with ".debug" as suffix. -f /path/to/file Pass a configuration file to policyd-weight -h show help -k kill cache daemon Not for use in master.cf. Together with -d this kills the debug cache daemon. Without -d it kills the global running cache dae- mon. -s show cache entries Not for use in master.cf. -v show version LOGGING Logging is done via syslog(3) with facility "mail" and priority "info". For a complete list of log entries and their correspondending configu- ration parameters refer to policyd-weight.conf(5). BUGS Please report bugs to r.felber@ek-muc.de HISTORY March 2005 Ralf Hildebrandt (Author of the Book of Postfix) is the spiri- tual father of policyd-weight. It was his idea to have a scored RBL evaluation, I've added the weighted MAIL FROM/HELO DNS-eval- uation. For that purpose I used Meng Wong's spf.pl which was shipped with the postfix source as example. FILES /etc/policyd-weight.conf, Policyd-weight configuration file /etc/postfix/main.cf, Postfix configuration parameters /etc/postfix/master.cf, Postfix daemon processes SEE ALSO policyd-weight.conf(5), Policyd-weight configuration file master(5), Postfix master.cf file syntax postconf(5), Postfix main.cf file syntax access(5), Postfix SMTP access control table LICENSE GNU General Public License AUTHOR Robert Felber <r.felber@selling-it.de> PC & IT Services Selling-IT 85560 Ebersberg, Germany Aug 25th, 2006 policyd-weight(8)
NAME | STATUS | SYNOPSIS | DESCRIPTION | SETUP | master.cf mode: | daemon mode: | COMMANDS | OPTIONS | LOGGING | BUGS | HISTORY | FILES | SEE ALSO | LICENSE | AUTHOR
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