206 lines
5.0 KiB
CFEngine3
206 lines
5.0 KiB
CFEngine3
###################################################################################################
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##
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## ATTENTION: This configuration uses features which require at least postfwd 1.30!
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## Please see the manual ('postfwd -m') for example syntax for prior versions.
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##
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###################################################################################################
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##
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## Definitions
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##
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# Maintenance times
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&&MAINTENANCE {
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date=15.01.2007
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date=15.10.2007 - 17.10.2007
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# keep as an example.
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#days=Sat-Sun
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#time=03:00:00 - 04:00:00
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}
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# Whitelists
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&&TRUSTED_NETS {
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# empty on propose
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#client_address=192.168.1.0/22
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#client_address=172.16.128.32/27
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}
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&&TRUSTED_HOSTS {
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# put them in here as an example.
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client_name~=\.debian\.org$
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client_name~=\.lists\.debian\.org$
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}
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&&TRUSTED_USERS {
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# examples
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#sasl_username==user@example.com
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#sasl_username==(.*)@example.net
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}
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&&TRUSTED_TLS {
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# whitelist know certs
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#ccert_fingerprint==AA:BB:CC:DD:EE:FF:11:22:33:44:55:66
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# optionally, whitelist senders which use TLS
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#encryption_keysize>=64
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}
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&&FREEMAIL {
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client_name~=\.gmx\.net$
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client_name~=\.web\.de$
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client_name~=\.(aol|gmail|outlook|yahoo|h(ush|ot)mail)\.com$
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}
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&&STATIC {
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# contains freemailers
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&&FREEMAIL
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client_name~=[\.\-]static[[\.\-]
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client_name~=^(mail|smtp|mout|mx)[\-]*[0-9]*\.
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}
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&&DNSWLS {
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rbl=sbl-xbl.spamhaus.org
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rbl=list.dnswl.org
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rbl=query.bondedsender.org
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rbl=hostkarma.junkemailfilter.com/^127\.0\.0\.1$/3600
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rhsbl_client=hostkarma.junkemailfilter.com/^127\.0\.0\.1$/3600
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}
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# Spamchecks
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&&BADHELO {
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client_name==!!($$(helo_name))
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}
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&&DYNAMIC {
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client_name==unknown
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client_name~=(\-.+){4}
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client_name~=\d{5}
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client_name~=[_\.\-]([axt]{0,1}dsl|br(e|oa)dband|ppp|pppoe|dynamic|dynip|ADSL|dial(up|in)|pool|dhcp|leased)[_\.\-]
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}
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&&DNSBLS {
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rbl=zen.spamhaus.org
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rbl=list.dsbl.org
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rbl=bl.spamcop.net
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rbl=dnsbl.sorbs.net
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rbl=ix.dnsbl.manitu.net
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rhsbl=rddn.dnsbl.net.au
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rhsbl=rhsbl.sorbs.net
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}
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##
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## Ruleset
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##
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# temporary reject and drop connection during maintenance window
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id=M_001
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&&MAINTENANCE
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action=421 maintenance - please try again later
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# stress-friendly behaviour (will not match on postfix version pre 2.5)
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id=STRESS
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stress==yes
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action=dunno
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# Whitelists
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id=WL_001
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&&TRUSTED_NETS
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action=dunno
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id=WL_002
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&&TRUSTED_HOSTS
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action=dunno
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id=WL_003
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&&TRUSTED_USERS
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action=dunno
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id=WL_004
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&&TRUSTED_TLS
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action=dunno
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# DNSWL checks - lookup
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id=RWL_001
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&&DNSWLS
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rhsblcount=all ; rblcount=all
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action=set(HIT_dnswls=$$rhsblcount,HIT_dnswls+=$$rblcount,DSWL_text=$$dnsbltext)
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# DNSWL - whitelisting
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id=RWL_002
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HIT_dnswls>=2
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action=PREPEND X-PFW-STATE: INFO: [$$DSWL_text]
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id=RWL_003
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HIT_dnswls>=1
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action=PREPEND X-PFW-STATE: INFO: [$$DSWL_text] ; &&STATIC
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id=RWL_004
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HIT_dnswls>=1
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action=PREPEND X-PFW-STATE: INFO: [$$DSWL_text] ; $$client_name~=$$(sender_domain)$
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# DNSBL checks - lookup
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id=RBL_001
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&&DNSBLS
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rhsblcount=all ; rblcount=all
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action=set(HIT_dnsbls=$$rhsblcount,HIT_dnsbls+=$$rblcount,DSBL_text=$$dnsbltext)
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# DNSBL checks - evaluation
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# this will drop emails from servers which are in 2 or more blacklists
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id=RBL_002
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HIT_dnsbls>=2
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action=554 5.7.1 blocked using $$DSBL_count dnsbls, INFO: [$$DSBL_text]
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# this will drop emails from servers which are in more than 1 blacklist and have dynamic ip address
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id=RBL_003
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HIT_dnsbls>=1
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&&DYNAMIC
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action=REJECT listed on dnsbl and $$client_name looks like dynip, INFO: [$$DSBL_text]
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# this will drop emails from servers which are in more than 1 blacklist and helo does not match their PTR
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id=RBL_004
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HIT_dnsbls>=1
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&&BADHELO
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action=REJECT listed on dnsbl and $$helo_name does not match $$client_name, INFO: [$$DSBL_text]
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# Rate limits
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# rate limit servers in more than 1 dnsbl, which didn't login
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id=RATE_001
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sasl_username==unknown
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HIT_dnsbls>=1
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action=rate($$client_address/1/300/450 4.7.1 please do not try more than once per 5 minutes)
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# rate limit servers behind a dynamic ip address, if they didn't login
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id=RATE_002
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sasl_username==unknown
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&&DYNAMIC
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action=rate($$client_address/1/300/450 4.7.1 please do not try more than once per 5 minutes)
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# Selective greylisting
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# do no greylist freeemailers and servers with PTR
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id=GREY_001
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action=dunno
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&&STATIC
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# do no greylist emails which sender domain matches the server domain
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id=GREY_002
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action=dunno
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$$client_name~=$$(sender_domain)$
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# do no greylist emails which sender is in one or more dnswl.
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id=GREY_003
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action=dunno
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HIT_dnswls>=1
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# greylist dynamic ip senders
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id=GREY_004
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action=greylisting
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&&DYNAMIC
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# greylist servers in one or more dnsbl.
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id=GREY_005
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action=greylisting
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HIT_dnsbls>=1
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# Greylisting should be safe during out-of-office times
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# there is no thing as office hours, so I'll leave this commented out.
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#
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#id=GREY_006
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# action=greylisting
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# days=Sat-Sun
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#id=GREY_007
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# action=greylisting
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# days=Mon-Fri
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# time=!!06:00:00-20:00:00
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