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Imported Upstream version 1.20

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Jan Wagner 2013-11-05 17:33:35 +01:00
parent 80611ddc0e
commit 6a47d71615
11 changed files with 8688 additions and 73 deletions
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1
bin/postfwd-script.sh
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@ -7,6 +7,7 @@
PATH=/bin:/usr/bin:/usr/local/bin
# path to program
#PFWCMD=/usr/local/postfwd/sbin/postfwd2
PFWCMD=/usr/local/postfwd/sbin/postfwd
# rulesetconfig file
PFWCFG=/etc/postfix/postfwd.cf

15
doc/CHANGELOG
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@ -1,3 +1,18 @@
1.20
=====
- code: changed the default umask for the server socket to 0111
to support out-of-the-box postfix setup. Use the
--umask setting to change this
- bugfix: rbl check could fail on multiple dnsbl answers
- bugfix: rbl checks disabled for ipv6 addresses, cidr compare
will switch to default (regex/string)
1.19
=====
- code: Rate limit code rewritten
- code: new --umask setting allows to set filepermissions for pidfiles
and unix domain sockets. Default is 0117 (owner and group rw).
1.18
=====
- bugfix: Fixed bug when comparing sender and recipient addresses, like

173
doc/CHANGELOG2 Normal file
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@ -0,0 +1,173 @@
postfwd2 1.00
=============
- code: changed the default umask for the server socket to 0111
to support out-of-the-box postfix setup. Use the
--server_umask setting to change this
- code: --dumpcache command does not require debug mode anymore
- code: rate hits included to cache stats
- bugfix: rbl checks disabled for ipv6 addresses, cidr compare
will switch to default (regex/string)
postfwd2 0.22
=============
- feature: Rate limits are completely supported by postfwd2 now.
Please note that the cache daemon is required for reliable operation.
- bugfix: --syslog_facility could not be changed
- code: rate limit code rewritten
- code: new --umask, --cache_umask and --server_umask settings allow to set
filepermissions for pidfiles and unix domain sockets. New defaults are:
* master (pidfile): 0177 (owner rw)
* cache (socket): 0177 (owner rw)
* server (socket): 0117 (owner and group rw)
postfwd2 0.21
=============
- bugfix: Fixed bug when comparing sender and recipient addresses, like
"sender=$$recipient". This affects only postfwd2 version 0.20.
postfwd2 0.20
=============
- bugfix: Invalid characters in variable substitutions were not correctly catched when
the '=' operator was used, like "client_name=$$helo_name". If you can not
upgrade for some reason change your rule to "client_name=~$$helo_name"
- code: Net::DNS errors will now be handled gracefully
- code: default for options --dns_max_ns_a_lookups and --dns_max_mx_a_lookups of 100
postfwd2 0.19
=============
- bugfix: this is a bugfix release for 0.18. anyone affected is encouraged to upgrade.
detail: the default behavior for the '=' operator with numeric items
(size, recipient_count, ...) changed with version 0.18 to '==' (equals to).
now these items are compared '>=' (greater than) again.
note: if you are using 0.18 and you are not able upgrade for some reason,
please change '=' to '>=' in your ruleset where you mean 'greater than'.
postfwd2 0.18
=============
- feature: items may now be retrieved from files using "item=file:/some/where"
more information in the postfwd manual (FILES section)
- feature: helo_address, and sender_(ns|mx)_addrs can now be csv items
- feature: new rcpt() command counts recipients for rate limits (thanks to Sahil Tandon)
- code: redirect syslog to stdout for --kill, --reload, --showconfig and --dump(cache|stats)
- code: option --reload (HUP signal) now reloads config, if the file is unchanged
- code: new --debug classes 'config' and 'request'
- code: configuration parser improvements:
* rules without defined action will be skipped at configuration stage
* undefined ACLs will now be detected and skipped at configuration stage
* parser timeout skips loading a rule after 4s, to prevent problems with
large files or loops. use --config_timeout to override
- bugfix: documentation fixed (missing "action=" in ask() examples)
- bugfix: fixed logging of an uninitialized value in cache cleanups
postfwd2 0.17
=============
- feature: new compare operators *
====================================================================
ITEM == VALUE true if ITEM equals VALUE
ITEM => VALUE true if ITEM >= VALUE
ITEM =< VALUE true if ITEM <= VALUE
ITEM =~ VALUE true if ITEM ~= /^VALUE$/i
*ITEM != VALUE false if ITEM equals VALUE
*ITEM !> VALUE false if ITEM >= VALUE
*ITEM !< VALUE false if ITEM <= VALUE
*ITEM !~ VALUE false if ITEM ~= /^VALUE$/i
ITEM = VALUE default behaviour (see ITEMS section)
====================================================================
- feature: added --nodaemon and --stdout options
- code: non dns items first: if a rule contains dns and non dns items, the
lookups will only be done if all non dns items matched
- bugfix: empty pcre with empty sender_(ns|mx)_names was parsed incorrectly.
this bug affects postfwd2 versions 0.15 - 0.16
- bugfix: negated pcre items with '~=' operator were parsed incorrectly.
this bug affects postfwd2 version 0.16
postfwd2 0.16
=============
- feature: enabled dns cache for sender(ns|mx) and helo address
- feature: new options --dns_max_ns_lookups and --dns_max_mx_lookups
- code: parent_dns_cache is now disabled by default. use
--parent_dns_cache if you have a slow nameserver
- bugfix: workaround: Net::Server died if a unix domain socket
filename without a dot ('.') was used (B. Frauendienst)
postfwd2 0.15
=============
- feature: new items sender_ns_names and sender_ns_addrs
- feature: new items sender_mx_names and sender_mx_addrs
- feature: new item helo_address, please see docs for more
- feature: new parent cache statistics. the command line option --dumpstats
uses the --daemons setting now (default: cache,server)
- feature: dnsbl txt lookups only for dnsbls with at least one a record.
use --dns_async_txt for the old behaviour (see docs for more).
- code: summary function went to postfwd::master (and will stay there ;)
- code: small performance improvement (5-10%) for pcre (~= or =~) items
- bugfix: network 0.0.0.0/0 did not work as expected on all platforms
postfwd2 0.14
=============
- code: summary function was moved from postfwd::cache to postfwd::policy.
the reduced policy <-> cache communication increases throughput
considerably and improves cpu balancing on multiprocessor systems
- bugfix: fixed potential division by zero in summary function
postfwd2 0.13
=============
- feature: new options --noidlestats and --norulestats
- feature: more informative --version
- feature: documentation updates
- bugfix: disabled parent_cache counters when --summary=0
postfwd2 0.12
=============
- feature: the ask() action allows to delegate the policy decision to another
policy service (like postgrey). a new parameter allows to specify
answer patterns which should be ignored by postfwd. please look
at the 'ACTIONS' section in the manual (postfwd2 -m) for details.
- feature: parent-request cache will now only be updated, if a rule matches.
if postfwd should cache all requests, you must place a last rule:
id=DEFAULT; action=dunno
- bugfix: reorganised some parent-cache loggings for -vv and *cache debug classes
postfwd2 0.11
=============
- bugfix: all postfwd settings are now detainted
- bugfix: cache-update used an uninitialized value when no rule had hit
postfwd2 0.10
=============
- bugfix: command line arguments --pidfile
postfwd2 0.09
=============
- bugfix: command line arguments --user and --group were not correctly de-tainted
postfwd2 0.08
=============
- bugfix: command line argument --pid_file was ignored
- bugfix: command line argument --manual (-m) did not work
postfwd2 0.07
=============
- first semi-public release of postfwd2
- full ruleset compatibility, no changes required when migrating from postfwd v1
- new architecture:
* Net::Server::PreFork
ruleset processor (server) forks new child for any request
* Net::Server::Multiplex for parent cache
offers a shared request, dns and rate cache for postfwd2 children
* Net::Server::Daemonize for master process
controls server and cache (watchdog function) and allows direct
access to statistics, cache-contents, ... from the command-line
- many new commandline options (see postfwd2 -h) for more information

24
doc/postfwd.html
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@ -64,6 +64,7 @@
--proto &lt;proto&gt; socket type (tcp or unix)
-u, --user &lt;name&gt; set uid to user &lt;name&gt;
-g, --group &lt;name&gt; set gid to group &lt;name&gt;
--umask &lt;mask&gt; set umask for file permissions
-R, --chroot &lt;path&gt; chroot the daemon to &lt;path&gt;
--pidfile &lt;path&gt; create pidfile under &lt;path&gt;
-l, --logname &lt;label&gt; label for syslog messages
@ -443,10 +444,11 @@ rule containing only an action statement:</p>
this command creates a counter for the given &lt;item&gt;, which will be increased any time a request
containing it arrives. if it exceeds &lt;max&gt; within &lt;time&gt; seconds it will return &lt;action&gt; to postfix.
rate counters are very fast as they are executed before the ruleset is parsed.
please note that &lt;action&gt; is currently limited to postfix actions (no postfwd actions)!
# no more than 3 requests per 5 minutes
# from the same &quot;unknown&quot; client
id=RATE01 ; client_name==unknown ; \
action==rate($$client_address/3/300/450 4.7.1 sorry, max 3 requests per 5 minutes)</pre>
action==rate(client_address/3/300/450 4.7.1 sorry, max 3 requests per 5 minutes)</pre>
<pre>
size (&lt;item&gt;/&lt;max&gt;/&lt;time&gt;/&lt;action&gt;)
this command works similar to the rate() command with the difference, that the rate counter is
@ -454,7 +456,7 @@ rule containing only an action statement:</p>
smtpd_end_of_data_restrictions. if you want to be sure, you could check it within the ruleset:
# size limit 1.5mb per hour per client
id=SIZE01 ; state==END_OF_DATA ; client_address==!!(10.1.1.1); \
action==size($$client_address/1572864/3600/450 4.7.1 sorry, max 1.5mb per hour)</pre>
action==size(client_address/1572864/3600/450 4.7.1 sorry, max 1.5mb per hour)</pre>
<pre>
rcpt (&lt;item&gt;/&lt;max&gt;/&lt;time&gt;/&lt;action&gt;)
this command works similar to the rate() command with the difference, that the rate counter is
@ -463,7 +465,7 @@ rule containing only an action statement:</p>
check it within the ruleset:
# recipient count limit 3 per hour per client
id=RCPT01 ; state==END_OF_DATA ; client_address==!!(10.1.1.1); \
action==rcpt($$client_address/3/3600/450 4.7.1 sorry, max 3 recipients per hour)</pre>
action==rcpt(client_address/3/3600/450 4.7.1 sorry, max 3 recipients per hour)</pre>
<pre>
ask (&lt;addr&gt;:&lt;port&gt;[:&lt;ignore&gt;])
allows to delegate the policy decision to another policy service (e.g. postgrey). the first
@ -609,6 +611,11 @@ The following arguments will control it's behaviour in this case.</p>
<pre>
-g, --group &lt;name&gt;
Changes real and effective group to &lt;name&gt;.</pre>
<pre>
--umask &lt;mask&gt;
Changes the umask for filepermissions (unix domain sockets, pidfiles).
Attention: This is umask, not chmod - you have to specify the bits that
should NOT apply. E.g.: umask 077 equals to chmod 700.</pre>
<pre>
-R, --chroot &lt;path&gt;
Chroot the process to the specified path.
@ -805,9 +812,10 @@ the '-I' switch to have your configuration refreshed for every request postfwd r
# 1. 30MB for systems in *.customer1.tld
# 2. 20MB for SASL user joejob
# 3. 10MB default
id=SZ001; state==END-OF-MESSAGE; action=REJECT message too large; size=30000000 ; client_name=\.customer1.tld$
id=SZ002; state==END-OF-MESSAGE; action=REJECT message too large; size=20000000 ; sasl_username==joejob
id=SZ003; state==END-OF-MESSAGE; action=REJECT message too large; size=10000000</pre>
id=SZ001; state==END-OF-MESSAGE; action=DUNNO; size&lt;=30000000 ; client_name=\.customer1.tld$
id=SZ002; state==END-OF-MESSAGE; action=DUNNO; size&lt;=20000000 ; sasl_username==joejob
id=SZ002; state==END-OF-MESSAGE; action=DUNNO; size&lt;=10000000
id=SZ100; state==END-OF-MESSAGE; action=REJECT message too large</pre>
<pre>
## Selective Greylisting
# 1. if listed on zen.spamhaus.org with results 127.0.0.10 or .11, dns cache timeout 1200s
@ -856,9 +864,9 @@ the '-I' switch to have your configuration refreshed for every request postfwd r
# 1. exceeded 30 requests per hour or
# 2. tried to send more than 1.5mb within 10 minutes
id=RATE01 ; client_name==unknown ; state==RCPT ; \
action==rate($$client_address/30/3600/450 4.7.1 sorry, max 30 requests per hour)
action==rate(client_address/30/3600/450 4.7.1 sorry, max 30 requests per hour)
id=SIZE01 ; client_name==unknown ; state==END_OF_DATA ; \
action==size($$client_address/1572864/600/450 4.7.1 sorry, max 1.5mb per 10 minutes)</pre>
action==size(client_address/1572864/600/450 4.7.1 sorry, max 1.5mb per 10 minutes)</pre>
<pre>
## Macros
# definition

24
doc/postfwd.txt
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@ -18,6 +18,7 @@ SYNOPSIS
--proto <proto> socket type (tcp or unix)
-u, --user <name> set uid to user <name>
-g, --group <name> set gid to group <name>
--umask <mask> set umask for file permissions
-R, --chroot <path> chroot the daemon to <path>
--pidfile <path> create pidfile under <path>
-l, --logname <label> label for syslog messages
@ -464,10 +465,11 @@ DESCRIPTION
this command creates a counter for the given <item>, which will be increased any time a request
containing it arrives. if it exceeds <max> within <time> seconds it will return <action> to postfix.
rate counters are very fast as they are executed before the ruleset is parsed.
please note that <action> is currently limited to postfix actions (no postfwd actions)!
# no more than 3 requests per 5 minutes
# from the same "unknown" client
id=RATE01 ; client_name==unknown ; \
action==rate($$client_address/3/300/450 4.7.1 sorry, max 3 requests per 5 minutes)
action==rate(client_address/3/300/450 4.7.1 sorry, max 3 requests per 5 minutes)
size (<item>/<max>/<time>/<action>)
this command works similar to the rate() command with the difference, that the rate counter is
@ -475,7 +477,7 @@ DESCRIPTION
smtpd_end_of_data_restrictions. if you want to be sure, you could check it within the ruleset:
# size limit 1.5mb per hour per client
id=SIZE01 ; state==END_OF_DATA ; client_address==!!(10.1.1.1); \
action==size($$client_address/1572864/3600/450 4.7.1 sorry, max 1.5mb per hour)
action==size(client_address/1572864/3600/450 4.7.1 sorry, max 1.5mb per hour)
rcpt (<item>/<max>/<time>/<action>)
this command works similar to the rate() command with the difference, that the rate counter is
@ -484,7 +486,7 @@ DESCRIPTION
check it within the ruleset:
# recipient count limit 3 per hour per client
id=RCPT01 ; state==END_OF_DATA ; client_address==!!(10.1.1.1); \
action==rcpt($$client_address/3/3600/450 4.7.1 sorry, max 3 recipients per hour)
action==rcpt(client_address/3/3600/450 4.7.1 sorry, max 3 recipients per hour)
ask (<addr>:<port>[:<ignore>])
allows to delegate the policy decision to another policy service (e.g. postgrey). the first
@ -648,6 +650,11 @@ DESCRIPTION
-g, --group <name>
Changes real and effective group to <name>.
--umask <mask>
Changes the umask for filepermissions (unix domain sockets, pidfiles).
Attention: This is umask, not chmod - you have to specify the bits that
should NOT apply. E.g.: umask 077 equals to chmod 700.
-R, --chroot <path>
Chroot the process to the specified path.
Test this before using - you might need some libs there.
@ -847,9 +854,10 @@ DESCRIPTION
# 1. 30MB for systems in *.customer1.tld
# 2. 20MB for SASL user joejob
# 3. 10MB default
id=SZ001; state==END-OF-MESSAGE; action=REJECT message too large; size=30000000 ; client_name=\.customer1.tld$
id=SZ002; state==END-OF-MESSAGE; action=REJECT message too large; size=20000000 ; sasl_username==joejob
id=SZ003; state==END-OF-MESSAGE; action=REJECT message too large; size=10000000
id=SZ001; state==END-OF-MESSAGE; action=DUNNO; size<=30000000 ; client_name=\.customer1.tld$
id=SZ002; state==END-OF-MESSAGE; action=DUNNO; size<=20000000 ; sasl_username==joejob
id=SZ002; state==END-OF-MESSAGE; action=DUNNO; size<=10000000
id=SZ100; state==END-OF-MESSAGE; action=REJECT message too large
## Selective Greylisting
# 1. if listed on zen.spamhaus.org with results 127.0.0.10 or .11, dns cache timeout 1200s
@ -898,9 +906,9 @@ DESCRIPTION
# 1. exceeded 30 requests per hour or
# 2. tried to send more than 1.5mb within 10 minutes
id=RATE01 ; client_name==unknown ; state==RCPT ; \
action==rate($$client_address/30/3600/450 4.7.1 sorry, max 30 requests per hour)
action==rate(client_address/30/3600/450 4.7.1 sorry, max 30 requests per hour)
id=SIZE01 ; client_name==unknown ; state==END_OF_DATA ; \
action==size($$client_address/1572864/600/450 4.7.1 sorry, max 1.5mb per 10 minutes)
action==size(client_address/1572864/600/450 4.7.1 sorry, max 1.5mb per 10 minutes)
## Macros
# definition

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34
man/man8/postfwd.8
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@ -129,7 +129,7 @@
.\" ========================================================================
.\"
.IX Title "POSTFWD 1"
.TH POSTFWD 1 "2009-09-03" "perl v5.8.5" "User Contributed Perl Documentation"
.TH POSTFWD 1 "2010-11-14" "perl v5.8.5" "User Contributed Perl Documentation"
.SH "NAME"
postfwd \- postfix firewall daemon
.SH "SYNOPSIS"
@ -147,7 +147,7 @@ postfwd [\s-1OPTIONS\s0] [\s-1SOURCE1\s0, \s-1SOURCE2\s0, ...]
\& -s, --scores <v>=<r> returns <r> when score exceeds <v>
.Ve
.PP
.Vb 11
.Vb 12
\& Networking:
\& -d, --daemon run postfwd as daemon
\& -i, --interface <dev> listen on interface <dev>
@ -155,6 +155,7 @@ postfwd [\s-1OPTIONS\s0] [\s-1SOURCE1\s0, \s-1SOURCE2\s0, ...]
\& --proto <proto> socket type (tcp or unix)
\& -u, --user <name> set uid to user <name>
\& -g, --group <name> set gid to group <name>
\& --umask <mask> set umask for file permissions
\& -R, --chroot <path> chroot the daemon to <path>
\& --pidfile <path> create pidfile under <path>
\& -l, --logname <label> label for syslog messages
@ -674,15 +675,16 @@ postfwd actions control the behaviour of the program. Currently you can specify
\& by "," characters.
.Ve
.PP
.Vb 8
.Vb 9
\& rate (<item>/<max>/<time>/<action>)
\& this command creates a counter for the given <item>, which will be increased any time a request
\& containing it arrives. if it exceeds <max> within <time> seconds it will return <action> to postfix.
\& rate counters are very fast as they are executed before the ruleset is parsed.
\& please note that <action> is currently limited to postfix actions (no postfwd actions)!
\& # no more than 3 requests per 5 minutes
\& # from the same "unknown" client
\& id=RATE01 ; client_name==unknown ; \e
\& action==rate($$client_address/3/300/450 4.7.1 sorry, max 3 requests per 5 minutes)
\& action==rate(client_address/3/300/450 4.7.1 sorry, max 3 requests per 5 minutes)
.Ve
.PP
.Vb 7
@ -692,7 +694,7 @@ postfwd actions control the behaviour of the program. Currently you can specify
\& smtpd_end_of_data_restrictions. if you want to be sure, you could check it within the ruleset:
\& # size limit 1.5mb per hour per client
\& id=SIZE01 ; state==END_OF_DATA ; client_address==!!(10.1.1.1); \e
\& action==size($$client_address/1572864/3600/450 4.7.1 sorry, max 1.5mb per hour)
\& action==size(client_address/1572864/3600/450 4.7.1 sorry, max 1.5mb per hour)
.Ve
.PP
.Vb 8
@ -703,7 +705,7 @@ postfwd actions control the behaviour of the program. Currently you can specify
\& check it within the ruleset:
\& # recipient count limit 3 per hour per client
\& id=RCPT01 ; state==END_OF_DATA ; client_address==!!(10.1.1.1); \e
\& action==rcpt($$client_address/3/3600/450 4.7.1 sorry, max 3 recipients per hour)
\& action==rcpt(client_address/3/3600/450 4.7.1 sorry, max 3 recipients per hour)
.Ve
.PP
.Vb 9
@ -911,6 +913,13 @@ The following arguments will control it's behaviour in this case.
\& Changes real and effective group to <name>.
.Ve
.PP
.Vb 4
\& --umask <mask>
\& Changes the umask for filepermissions (unix domain sockets, pidfiles).
\& Attention: This is umask, not chmod - you have to specify the bits that
\& should NOT apply. E.g.: umask 077 equals to chmod 700.
.Ve
.PP
.Vb 3
\& -R, --chroot <path>
\& Chroot the process to the specified path.
@ -1179,14 +1188,15 @@ the '\-I' switch to have your configuration refreshed for every request postfwd
\& id=RBL04 ; action=REJECT combined RBL+RHSBL check ; rbl=bl.spamcop.net ; rhsbl=rhsbl.ahbl.org, rhsbl.sorbs.net
.Ve
.PP
.Vb 7
.Vb 8
\& ## Message size (requires message_size_limit to be set to 30000000)
\& # 1. 30MB for systems in *.customer1.tld
\& # 2. 20MB for SASL user joejob
\& # 3. 10MB default
\& id=SZ001; state==END-OF-MESSAGE; action=REJECT message too large; size=30000000 ; client_name=\e.customer1.tld$
\& id=SZ002; state==END-OF-MESSAGE; action=REJECT message too large; size=20000000 ; sasl_username==joejob
\& id=SZ003; state==END-OF-MESSAGE; action=REJECT message too large; size=10000000
\& id=SZ001; state==END-OF-MESSAGE; action=DUNNO; size<=30000000 ; client_name=\e.customer1.tld$
\& id=SZ002; state==END-OF-MESSAGE; action=DUNNO; size<=20000000 ; sasl_username==joejob
\& id=SZ002; state==END-OF-MESSAGE; action=DUNNO; size<=10000000
\& id=SZ100; state==END-OF-MESSAGE; action=REJECT message too large
.Ve
.PP
.Vb 7
@ -1245,9 +1255,9 @@ the '\-I' switch to have your configuration refreshed for every request postfwd
\& # 1. exceeded 30 requests per hour or
\& # 2. tried to send more than 1.5mb within 10 minutes
\& id=RATE01 ; client_name==unknown ; state==RCPT ; \e
\& action==rate($$client_address/30/3600/450 4.7.1 sorry, max 30 requests per hour)
\& action==rate(client_address/30/3600/450 4.7.1 sorry, max 30 requests per hour)
\& id=SIZE01 ; client_name==unknown ; state==END_OF_DATA ; \e
\& action==size($$client_address/1572864/600/450 4.7.1 sorry, max 1.5mb per 10 minutes)
\& action==size(client_address/1572864/600/450 4.7.1 sorry, max 1.5mb per 10 minutes)
.Ve
.PP
.Vb 8

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sbin/postfwd
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@ -25,7 +25,7 @@ use vars qw(@ISA);
# Program constants
our($NAME) = 'postfwd';
our($VERSION) = '1.18';
our($VERSION) = '1.20';
# Networking options (use -i, -p and -R to change)
our($def_net_pid) = "/var/run/".$NAME.".pid";
@ -33,6 +33,7 @@ our($def_net_chroot) = "";
our($def_net_interface) = "127.0.0.1";
our($def_net_port) = "10040";
our($def_net_proto) = "tcp";
our($def_net_umask) = "0111";
our($def_net_user) = "nobody";
our($def_net_group) = "nobody";
our($def_dns_queuesize) = "300";
@ -201,7 +202,7 @@ our($SepReq) = '///';
our($SepLst) = ':::';
our($KeyVal) = qr/^([^=]+)=(.*)$/;
use vars qw(
@Configs @Rules @CacheID @DNSBL_Text @Plugins
@Configs @Rules @CacheID @DNSBL_Text @Plugins @Rate_Items
%Config_Cache %DNS_Cache %Request_Cache %Rule_by_ID
%Matches %opt_scores %ACLs %Rates %Timeouts
%postfwd_items %postfwd_items_plugin
@ -212,7 +213,7 @@ use vars qw(
$Starttime $Startdate $Cleanup_Requests
$Cleanup_RBLs $Cleanup_Rates $Cleanup_Timeouts
$opt_daemon $opt_instantconfig $opt_nodns $opt_nodnslog
$opt_norulelog $opt_summary $net_interface $net_port
$opt_norulelog $opt_summary $net_interface $net_port $net_umask
$net_user $net_group $net_chroot $net_pid $net_proto
$opt_perfmon $opt_test $opt_verbose $opt_noidlestats
$opt_cache_rdomain_only $opt_cache_no_size $config_timeout
@ -576,6 +577,27 @@ sub prepare_item {
};
};
#
# compatibility for old "rate"-syntax
#
sub check_for_old_syntax {
my($myindex,$myfile,$mynum,$mykey,$myvalue) = @_;
if ($mykey =~ /^action$/) {
if ($myvalue =~ /^(\w[\-\w]+)\s*\(\s*(.*?)\s*\)$/) {
my($mycmd,$myarg) = ($1, $2);
if ($mycmd =~ /^(rate|size|rcpt)$/i) {
if ($myarg =~ /^\$\$(.*)$/) {
$myarg = $1;
$myvalue = "$mycmd($myarg)";
mylogs "notice", "notice: Rule $myindex ($myfile line $mynum): "
."removing obsolete '\$\$' for $mycmd limit index. See man page for new syntax." if $opt_verbose;
};
push @Rate_Items, (split '/', $myarg)[0];
};
};
};
return $myvalue;
};
#
# parses configuration line
#
sub parse_config_line {
@ -601,6 +623,7 @@ sub parse_config_line {
." overriding $mykey=\"".$myrule{$mykey}."\""
." with $mykey=\"$myvalue\""
if (defined $myrule{$mykey});
$myvalue = check_for_old_syntax($myindex,$myfile,$mynum,$mykey,$myvalue);
$myrule{$mykey} = $myvalue;
} elsif ($mykey =~ /^$COMP_CSV$/) {
$myvalue =~ s/\s*,\s*/,/g;
@ -663,7 +686,7 @@ sub read_config {
my($mytype,$myitem,$config);
# init, cleanup cache and config vars
@Rules = %Rule_by_ID = %Request_Cache = %Rates = ();
@Rules = %Rule_by_ID = %Request_Cache = %Rates = @Rate_Items = ();
# parse configurations
for $config (@Configs) {
@ -693,6 +716,8 @@ sub read_config {
} else {
# update Rule by ID hash
map { $Rule_by_ID{$Rules[$_]{$COMP_ID}} = $_ } (0 .. $#Rules);
@Rate_Items = uniq(@Rate_Items) if @Rate_Items;
mylogs $syslog_priority, "rate items: ".(join ', ', @Rate_Items) if $opt_verbose;
};
}
#
@ -874,6 +899,7 @@ sub rbl_check {
if $opt_verbose;
push @DNSBL_Text, $DNS_Cache{$myquery}{type}.':'.$DNS_Cache{$myquery}{name}.':<'.($DNS_Cache{$myquery}{TXT} || '').'>'
if (defined $DNS_Cache{$myquery}{type} and defined $DNS_Cache{$myquery}{name});
last ANSWER;
};
};
};
@ -885,7 +911,7 @@ sub rbl_check {
sub dns_query {
my (@queries) = @_; undef my @result;
eval {
local $SIG{__DIE__} = sub { mylogs 'notice', "dns err: \"$!\", detail: \"@_\""; };
local $SIG{__DIE__} = sub { mylogs 'notice', "dns err: \"$!\", detail: \"@_\""; return if $^S; };
@result = dns_query_net_dns(@queries);
};
return @result;
@ -1008,9 +1034,19 @@ sub postfwd_items {
my($myresult) = ($val and $myitem);
mylogs $syslog_priority, "type cidr : \"$myitem\" \"$cmp\" \"$val\"" if ($opt_verbose > 1);
if ($myresult) {
return $myresult if ( ($val eq '0.0.0.0/0') and ($myitem =~ /^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/) );
$val .= '/32' unless ($val =~ /\/\d{1,2}$/);
$myresult = cidr_match((cidr_parse($val)),$myitem);
# always true
$myresult = ($val eq '0.0.0.0/0');
unless ($myresult) {
# v4 addresses only
$myresult = ($myitem =~ /^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/);
if ($myresult) {
$val .= '/32' unless ($val =~ /\/\d{1,2}$/);
$myresult = cidr_match((cidr_parse($val)),$myitem);
} else {
mylogs $syslog_priority, "Non IPv4 address. Using type default" if ($opt_verbose > 1);
return &{$postfwd_compare{default}}($cmp,$val,$myitem,%request);
};
};
};
$myresult = not($myresult) if ($cmp eq '!=');
return $myresult;
@ -1313,6 +1349,8 @@ sub postfwd_items {
my($myaction) = $default_action; my($stop) = 0;
my($ratetype,$ratecount,$ratetime,$ratecmd) = split "/", $myarg, 4;
if ($ratetype and $ratecount and $ratetime and $ratecmd) {
if ( defined $request{$ratetype} ) {
$ratetype .= "=".$request{$ratetype};
unless ( defined $Rates{$ratetype} ) {
$Rates{$ratetype} = {
type => $mycmd,
@ -1328,6 +1366,9 @@ sub postfwd_items {
." [type: ".$mycmd.", max: ".$ratecount.", time: ".$ratetime."s]"
if ($opt_verbose > 1);
};
} else {
mylogs $syslog_priority, "[RULES] ".$myline.", ignoring empty index for ".$mycmd." limit '".$ratetype."'" if ($opt_verbose > 1);
};
} else {
mylogs "notice", "[RULES] ".$myline.", ignoring unknown ".$mycmd."() attribute \'".$myarg."\'";
};
@ -1558,7 +1599,7 @@ sub compare_rule {
mylogs "notice", "[DNSQUERY] skipping rbls: $timed - too much timeouts" if $timed;
push @queries, rbl_prepare_lookups ( $COMP_RBL_KEY, $request{reverse_address}, @{$Rules[$index]{$COMP_RBL_KEY}} )
if ( exists($Rules[$index]{$COMP_RBL_KEY}) );
if ( exists($Rules[$index]{$COMP_RBL_KEY}) and not($request{client_address} =~ /:/) );
push @queries, rbl_prepare_lookups ( $COMP_RHSBL_KEY, $request{client_name}, @{$Rules[$index]{$COMP_RHSBL_KEY}} )
if ( exists($Rules[$index]{$COMP_RHSBL_KEY}) and not($request{client_name} eq "unknown") );
push @queries, rbl_prepare_lookups ( $COMP_RHSBL_KEY_CLIENT, $request{client_name}, @{$Rules[$index]{$COMP_RHSBL_KEY_CLIENT}} )
@ -1818,31 +1859,35 @@ sub smtpd_access_policy {
};
# increase rate limits
RATES: foreach $checkreq (keys %request) {
next RATES unless ( $request{$checkreq} and (defined $Rates{$request{$checkreq}}) );
if ( ($now - $Rates{$request{$checkreq}}{"time"}) > $Rates{$request{$checkreq}}{ttl} ) {
if (@Rate_Items) {
RATES: foreach $checkreq (@Rate_Items) {
next RATES unless $request{$checkreq};
my $checkval = $checkreq."=".$request{$checkreq};
next RATES unless ( defined $Rates{$checkval});
if ( ($now - $Rates{$checkval}{"time"}) > $Rates{$checkval}{ttl} ) {
# renew rate
$Rates{$request{$checkreq}}{count} = ( ($Rates{$request{$checkreq}}{type} eq 'size') ? $request{size} :
(($Rates{$request{$checkreq}}{type} eq 'rcpt') ? $request{recipient_count} : 1 ) );
$Rates{$request{$checkreq}}{"time"} = $now;
mylogs $syslog_priority, "[RATE] renewing rate object ".$request{$checkreq}
." [type: ".$Rates{$request{$checkreq}}{type}
.", max: ".$Rates{$request{$checkreq}}{maxcount}
.", time: ".$Rates{$request{$checkreq}}{ttl}."s]"
$Rates{$checkval}{count} = ( ($Rates{$checkval}{type} eq 'size') ? $request{size} :
(($Rates{$checkval}{type} eq 'rcpt') ? $request{recipient_count} : 1 ) );
$Rates{$checkval}{"time"} = $now;
mylogs $syslog_priority, "[RATE] renewing rate object '".$checkval."'"
." [type: ".$Rates{$checkval}{type}
.", max: ".$Rates{$checkval}{maxcount}
.", time: ".$Rates{$checkval}{ttl}."s]"
if ($opt_verbose > 1);
} else {
# increase rate
$Rates{$request{$checkreq}}{count} += ( ($Rates{$request{$checkreq}}{type} eq 'size') ? $request{size} :
(($Rates{$request{$checkreq}}{type} eq 'rcpt') ? $request{recipient_count} : 1 ) );
mylogs $syslog_priority, "[RATE] increasing rate object ".$request{$checkreq}
." to ".$Rates{$request{$checkreq}}{count}
." [type: ".$Rates{$request{$checkreq}}{type}
.", max: ".$Rates{$request{$checkreq}}{maxcount}
.", time: ".$Rates{$request{$checkreq}}{ttl}."s]"
$Rates{$checkval}{count} += ( ($Rates{$checkval}{type} eq 'size') ? $request{size} :
(($Rates{$checkval}{type} eq 'rcpt') ? $request{recipient_count} : 1 ) );
mylogs $syslog_priority, "[RATE] increasing rate object '".$checkval."'"
." to ".$Rates{$checkval}{count}
." [type: ".$Rates{$checkval}{type}
.", max: ".$Rates{$checkval}{maxcount}
.", time: ".$Rates{$checkval}{ttl}."s]"
if ($opt_verbose > 1);
$ratehit = $checkreq if ($Rates{$request{$checkreq}}{count} > $Rates{$request{$checkreq}}{maxcount});
last RATES if $ratehit;
};
$ratehit = ($Rates{$checkval}{count} > $Rates{$checkval}{maxcount}) ? $checkval : undef;
last RATES if $ratehit;
};
};
# Request cache enabled?
@ -1885,10 +1930,10 @@ sub smtpd_access_policy {
if ( $ratehit ) {
$Counter_Rates++;
$Matches{$Rates{$request{$ratehit}}{rule}}++;
$myaction = $Rates{$request{$ratehit}}{action};
mylogs $syslog_priority, "[RATE] rule=".$Rule_by_ID{$Rates{$request{$ratehit}}{rule}}
. ", id=".$Rates{$request{$ratehit}}{rule}
$Matches{$Rates{$ratehit}{rule}}++;
$myaction = $Rates{$ratehit}{action};
mylogs $syslog_priority, "[RATE] rule=".$Rule_by_ID{$Rates{$ratehit}{rule}}
. ", id=".$Rates{$ratehit}{rule}
. ", client=".$request{client_name}."[".$request{client_address}."]"
. ", sender=<".(($request{sender} eq '<>') ? "" : $request{sender}).">"
. ", recipient=<".$request{recipient}.">"
@ -1896,10 +1941,10 @@ sub smtpd_access_policy {
. ", proto=".$request{protocol_name}
. ", state=".$request{protocol_state}
. ", delay=".(time - $now)."s"
. ", action=".$myaction." (item: ".$request{$ratehit}
. ", type: ".$Rates{$request{$ratehit}}{type}
. ", count: ".$Rates{$request{$ratehit}}{count}."/".$Rates{$request{$ratehit}}{maxcount}
. ", time: ".($now - $Rates{$request{$ratehit}}{"time"})."/".$Rates{$request{$ratehit}}{ttl}."s)"
. ", action=".$myaction." (item: '".$ratehit."'"
. ", type: ".$Rates{$ratehit}{type}
. ", count: ".$Rates{$ratehit}{count}."/".$Rates{$ratehit}{maxcount}
. ", time: ".($now - $Rates{$ratehit}{"time"})."/".$Rates{$ratehit}{ttl}."s)"
unless $opt_norulelog;
# check cache
@ -2071,6 +2116,7 @@ GetOptions ( "term|kill|stop|k" => \$opt_kill,
'proto=s' => \$net_proto,
'R|chroot=s' => \$net_chroot,
'pid|pidfile=s' => \$net_pid,
'umask=s' => \$net_umask,
'u|user=s' => \$net_user,
'g|group=s' => \$net_group,
'dns_queuesize=s' => \$dns_queuesize,
@ -2102,6 +2148,7 @@ GetOptions ( "term|kill|stop|k" => \$opt_kill,
'r|rule=s' => sub{ my($opt,$value) = @_; push (@Configs, $opt.'::'.$value) },
'plugins=s' => \@Plugins,
'V|version' => sub{ print "$NAME $VERSION (Net::DNS ".(Net::DNS->VERSION || '<undef>').", Net::Server ".(Net::Server->VERSION || '<undef>').", Sys::Syslog ".($Sys::Syslog::VERSION || '<undef>').", Perl ".$]." on ".$^O.")\n"; exit 1; },
'versionshort|shortversion' => sub{ print "$VERSION\n"; exit 1; },
'C|showconfig' => \$opt_showconfig,
'h|H|?|help|Help|HELP' => sub{ pod2usage (-msg => "\nPlease see \"".$NAME." -m\" for detailed instructions.\n", -verbose => 1); },
'm|M|manual' => sub{ # contructing command string (de-tainting $0)
@ -2168,6 +2215,7 @@ get_plugins (@Plugins) if @Plugins;
$net_interface ||= $def_net_interface;
$net_port ||= $def_net_port;
$net_proto ||= $def_net_proto;
$net_umask ||= $def_net_umask;
$net_user ||= $def_net_user;
$net_group ||= $def_net_group;
$net_chroot ||= $def_net_chroot;
@ -2180,6 +2228,7 @@ $syslog_name ||= $NAME;
$net_interface = ( $net_interface =~ /^(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})$/ ) ? $1 : $def_net_interface;
$net_port = ( $net_port =~ /^(\d+|[-\|\@\/\w. ]+)$/ ) ? $1 : $def_net_port;
$net_proto = ( $net_proto =~ /^(tcp|unix)$/i ) ? $1 : $def_net_proto;
$net_umask = ( $net_umask =~ /^([0-7]+)$/ ) ? $1 : $def_net_umask;
$net_user = ( $net_user =~ /^([\w]+)$/ ) ? $1 : $def_net_user;
$net_group = ( $net_group =~ /^([\w]+)$/ ) ? $1 : $def_net_group;
$net_chroot = ( $net_chroot =~ /^(.+)$/ ) ? $1 : $def_net_chroot;
@ -2224,6 +2273,7 @@ if ($opt_daemon) {
}, 'postfwd';
## run the servers main loop
umask oct($net_umask);
$server->run;
# ignore syslog failures
@ -2253,7 +2303,7 @@ if ($opt_daemon) {
mylogs $syslog_priority, "successfully installed signal handlers" if $opt_verbose;
# process init
umask 0077;
umask oct($net_umask);
setlocale(LC_ALL, 'C');
$0 = $0." ".join(" ",@CommandArgs);
chdir "/" or fatal_exit "Could not chdir to /";
@ -2329,6 +2379,7 @@ postfwd [OPTIONS] [SOURCE1, SOURCE2, ...]
--proto <proto> socket type (tcp or unix)
-u, --user <name> set uid to user <name>
-g, --group <name> set gid to group <name>
--umask <mask> set umask for file permissions
-R, --chroot <path> chroot the daemon to <path>
--pidfile <path> create pidfile under <path>
-l, --logname <label> label for syslog messages
@ -2758,10 +2809,11 @@ postfwd actions control the behaviour of the program. Currently you can specify
this command creates a counter for the given <item>, which will be increased any time a request
containing it arrives. if it exceeds <max> within <time> seconds it will return <action> to postfix.
rate counters are very fast as they are executed before the ruleset is parsed.
please note that <action> is currently limited to postfix actions (no postfwd actions)!
# no more than 3 requests per 5 minutes
# from the same "unknown" client
id=RATE01 ; client_name==unknown ; \
action==rate($$client_address/3/300/450 4.7.1 sorry, max 3 requests per 5 minutes)
action==rate(client_address/3/300/450 4.7.1 sorry, max 3 requests per 5 minutes)
size (<item>/<max>/<time>/<action>)
this command works similar to the rate() command with the difference, that the rate counter is
@ -2769,7 +2821,7 @@ postfwd actions control the behaviour of the program. Currently you can specify
smtpd_end_of_data_restrictions. if you want to be sure, you could check it within the ruleset:
# size limit 1.5mb per hour per client
id=SIZE01 ; state==END_OF_DATA ; client_address==!!(10.1.1.1); \
action==size($$client_address/1572864/3600/450 4.7.1 sorry, max 1.5mb per hour)
action==size(client_address/1572864/3600/450 4.7.1 sorry, max 1.5mb per hour)
rcpt (<item>/<max>/<time>/<action>)
this command works similar to the rate() command with the difference, that the rate counter is
@ -2778,7 +2830,7 @@ postfwd actions control the behaviour of the program. Currently you can specify
check it within the ruleset:
# recipient count limit 3 per hour per client
id=RCPT01 ; state==END_OF_DATA ; client_address==!!(10.1.1.1); \
action==rcpt($$client_address/3/3600/450 4.7.1 sorry, max 3 recipients per hour)
action==rcpt(client_address/3/3600/450 4.7.1 sorry, max 3 recipients per hour)
ask (<addr>:<port>[:<ignore>])
allows to delegate the policy decision to another policy service (e.g. postgrey). the first
@ -2943,6 +2995,11 @@ The following arguments will control it's behaviour in this case.
-g, --group <name>
Changes real and effective group to <name>.
--umask <mask>
Changes the umask for filepermissions (unix domain sockets, pidfiles).
Attention: This is umask, not chmod - you have to specify the bits that
should NOT apply. E.g.: umask 077 equals to chmod 700.
-R, --chroot <path>
Chroot the process to the specified path.
Test this before using - you might need some libs there.
@ -3144,9 +3201,10 @@ the '-I' switch to have your configuration refreshed for every request postfwd r
# 1. 30MB for systems in *.customer1.tld
# 2. 20MB for SASL user joejob
# 3. 10MB default
id=SZ001; state==END-OF-MESSAGE; action=REJECT message too large; size=30000000 ; client_name=\.customer1.tld$
id=SZ002; state==END-OF-MESSAGE; action=REJECT message too large; size=20000000 ; sasl_username==joejob
id=SZ003; state==END-OF-MESSAGE; action=REJECT message too large; size=10000000
id=SZ001; state==END-OF-MESSAGE; action=DUNNO; size<=30000000 ; client_name=\.customer1.tld$
id=SZ002; state==END-OF-MESSAGE; action=DUNNO; size<=20000000 ; sasl_username==joejob
id=SZ002; state==END-OF-MESSAGE; action=DUNNO; size<=10000000
id=SZ100; state==END-OF-MESSAGE; action=REJECT message too large
## Selective Greylisting
# 1. if listed on zen.spamhaus.org with results 127.0.0.10 or .11, dns cache timeout 1200s
@ -3195,9 +3253,9 @@ the '-I' switch to have your configuration refreshed for every request postfwd r
# 1. exceeded 30 requests per hour or
# 2. tried to send more than 1.5mb within 10 minutes
id=RATE01 ; client_name==unknown ; state==RCPT ; \
action==rate($$client_address/30/3600/450 4.7.1 sorry, max 30 requests per hour)
action==rate(client_address/30/3600/450 4.7.1 sorry, max 30 requests per hour)
id=SIZE01 ; client_name==unknown ; state==END_OF_DATA ; \
action==size($$client_address/1572864/600/450 4.7.1 sorry, max 1.5mb per 10 minutes)
action==size(client_address/1572864/600/450 4.7.1 sorry, max 1.5mb per 10 minutes)
## Macros
# definition

4219
sbin/postfwd2 Executable file
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