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-   -   Getting ClamAV and amavis back to service (http://www.howtoforge.com/forums/showthread.php?t=53658)

osterhase 4th August 2011 11:53

Getting ClamAV and amavis back to service
 
Hi there!

I'm referring to my earlier post here.

The time has come to put amavisd and ClamAV into service but I want to keep spamassasin and policydweight in service and in place. So that my roundcube-users can define their filterrules the same way as before. Additonally the ISPConfig Spamfilter-Stuff shall run.

I've disabled the anti-spam stuff of ISPConfig according to this in the main.cf (but I did neither uninstall nor stop amavis or clamAV). So to put them back to service I removed the uncomment-tags and ended up with the following errors when an user tried to send E-Mails:

Code:

Aug  4 11:41:15 flux01 postfix/smtp[6660]: 54F51B607D: to=<xxxx.xxxxx@xxxx.de>, relay=127.0.0.1[127.0.0.1]:10024, delay=319, delays=319/0.03/0/0, dsn=4.7.4, status=deferred (TLS is required, but was not offered by host 127.0.0.1[127.0.0.1])
Here is my main.cf (ISPConfig Anti-Spam-Stuff is commented out again):
Code:

# See /usr/share/postfix/main.cf.dist for a commented, more complete version

# LOCAL PATHNAME INFORMATION
queue_directory = /var/spool/postfix
command_directory = /usr/sbin
daemon_directory = /usr/lib/postfix
data_directory = /var/lib/postfix

# QUEUE AND PROCESS OWNERSHIP
mail_owner = postfix
default_privs = vmail

# INTERNET HOST AND DOMAIN NAMES
myhostname = flux01
mydomain = xxxxx.net

# SENDING MAIL
myorigin = /etc/mailname
smtpd_banner = $myhostname ESMTP Mailserver

# RECEIVING MAIL
inet_interfaces = all
inet_protocols = all
mydestination = localhost.localdomain, localhost, flux01.xxxxxx.net

# REJECTING MAIL FOR UNKNOWN LOCAL USERS
local_recipient_maps = proxy:unix:passwd.byname $alias_maps
unknown_local_recipient_reject_code = 550

# appending .domain is the MUA's job.
append_dot_mydomain = no

# Uncomment the next line to generate "delayed mail" warnings
#delay_warning_time = 4h

readme_directory = /usr/share/doc/postfix

# TLS parameters
smtpd_tls_cert_file=/etc/postfix/mail.cert
smtpd_tls_key_file=/etc/postfix/mail.key
smtpd_use_tls = yes
smtpd_tls_security_level = may
smtpd_tls_auth_only = no
smtp_helo_required = yes

smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache

# See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for
# information on enabling SSL in the smtp client.

# SASL
smtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth_dovecot
smtpd_sasl_auth_enable = yes
smtpd_sasl_authenticated_header = no
broken_sasl_auth_clients = yes

alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases

# Read-Maps
proxy_read_maps = $local_recipient_maps $mydestination $virtual_alias_maps $virtual_alias_domains $virtual_mailbox_maps $virtual_mailbox_domains $relay_recipient_maps $relay_domains $canonical_maps $sender_canonical_maps $recipient_canonical_maps $relocated_maps $transport_maps $mynetworks $virtual_mailbox_limit_maps

mynetworks = 127.0.0.0/8 [::1]/128
mailbox_size_limit = 0

# Virtual mailboxes
virtual_alias_maps = proxy:mysql:/etc/postfix/mysql-virtual_forwardings.cf, mysql:/etc/postfix/mysql-virtual_email2email.cf
virtual_mailbox_base = /var/vmail
virtual_mailbox_domains = proxy:mysql:/etc/postfix/mysql-virtual_domains.cf
virtual_mailbox_limit = 0
message_size_limit = 104857600
mailbox_size_limit = 200000000
virtual_mailbox_maps = proxy:mysql:/etc/postfix/mysql-virtual_mailboxes.cf
virtual_alias_domains =
virtual_uid_maps = static:5000
virtual_gid_maps = static:5000
virtual_transport = dovecot

transport_maps = proxy:mysql:/etc/postfix/mysql-virtual_transports.cf
relay_domains = mysql:/etc/postfix/mysql-virtual_relaydomains.cf
relay_recipient_maps = mysql:/etc/postfix/mysql-virtual_relayrecipientmaps.cf

smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, check_recipient_access mysql:/etc/postfix/mysql-virtual_recipient.cf, reject_unauth_destination, check_policy_service inet:127.0.0.1:12525

smtpd_sender_restrictions = check_sender_access mysql:/etc/postfix/mysql-virtual_sender.cf

smtpd_client_restrictions = check_client_access mysql:/etc/postfix/mysql-virtual_client.cf

# Destination Limits
dovecot_destination_recipient_limit = 1
spamassassin_destination_recipient_limit = 1
maildrop_destination_concurrency_limit = 1
maildrop_destination_recipient_limit = 1

header_checks = regexp:/etc/postfix/header_checks
mime_header_checks = regexp:/etc/postfix/mime_header_checks
nested_header_checks = regexp:/etc/postfix/nested_header_checks
body_checks = regexp:/etc/postfix/body_checks

# ISPConfig Anti-Spam
#content_filter = amavis:[127.0.0.1]:10024
#receive_override_options = no_address_mappings

#Relay at xxxxx.com
relayhost = [xxxx.com]
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/smtp_auth
smtp_sasl_security_options = noanonymous
smtp_sasl_type = cyrus
smtp_use_tls = yes
smtp_enforce_tls = yes
smtp_tls_enforce_peername = no

This is my master.cf:
Code:

#
# Postfix master process configuration file.  For details on the format
# of the file, see the master(5) manual page (command: "man 5 master").
#
# Do not forget to execute "postfix reload" after editing this file.
#
# ==========================================================================
# service type  private unpriv  chroot  wakeup  maxproc command + args
#              (yes)  (yes)  (yes)  (never) (100)
# ==========================================================================
smtp      inet  n      -      -      -      -      smtpd
  -o content_filter=spamassassin
#submission inet n      -      -      -      -      smtpd
#  -o smtpd_tls_security_level=encrypt
#  -o smtpd_sasl_auth_enable=yes
#  -o smtpd_client_restrictions=permit_sasl_authenticated,reject
#  -o milter_macro_daemon_name=ORIGINATING
smtps    inet  n      -      -      -      -      smtpd
  -o smtpd_tls_wrappermode=yes
#  -o smtpd_sasl_auth_enable=yes
#  -o smtpd_client_restrictions=permit_sasl_authenticated,reject
#  -o milter_macro_daemon_name=ORIGINATING
#628      inet  n      -      -      -      -      qmqpd
pickup    fifo  n      -      -      60      1      pickup
cleanup  unix  n      -      -      -      0      cleanup
qmgr      fifo  n      -      n      300    1      qmgr
#qmgr    fifo  n      -      -      300    1      oqmgr
tlsmgr    unix  -      -      -      1000?  1      tlsmgr
rewrite  unix  -      -      -      -      -      trivial-rewrite
bounce    unix  -      -      -      -      0      bounce
defer    unix  -      -      -      -      0      bounce
trace    unix  -      -      -      -      0      bounce
verify    unix  -      -      -      -      1      verify
flush    unix  n      -      -      1000?  0      flush
proxymap  unix  -      -      n      -      -      proxymap
proxywrite unix -      -      n      -      1      proxymap
smtp      unix  -      -      -      -      -      smtp
# When relaying mail as backup MX, disable fallback_relay to avoid MX loops
relay    unix  -      -      -      -      -      smtp
        -o smtp_fallback_relay=
#      -o smtp_helo_timeout=5 -o smtp_connect_timeout=5
showq    unix  n      -      -      -      -      showq
error    unix  -      -      -      -      -      error
retry    unix  -      -      -      -      -      error
discard  unix  -      -      -      -      -      discard
local    unix  -      n      n      -      -      local
virtual  unix  -      n      n      -      -      virtual
lmtp      unix  -      -      -      -      -      lmtp
anvil    unix  -      -      -      -      1      anvil
scache    unix  -      -      -      -      1      scache
#
# ====================================================================
# Interfaces to non-Postfix software. Be sure to examine the manual
# pages of the non-Postfix software to find out what options it wants.
#
# Many of the following services use the Postfix pipe(8) delivery
# agent.  See the pipe(8) man page for information about ${recipient}
# and other message envelope options.
# ====================================================================
#
# maildrop. See the Postfix MAILDROP_README file for details.
# Also specify in main.cf: maildrop_destination_recipient_limit=1
#
maildrop  unix  -      n      n      -      -      pipe
  flags=DRhu user=vmail argv=/usr/bin/maildrop -d vmail ${extension} ${recipient} ${user} ${nexthop} ${sender}
#
# See the Postfix UUCP_README file for configuration details.
#
uucp      unix  -      n      n      -      -      pipe
  flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient)
#
# Other external delivery methods.
#
ifmail    unix  -      n      n      -      -      pipe
  flags=F user=ftn argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient)
bsmtp    unix  -      n      n      -      -      pipe
  flags=Fq. user=bsmtp argv=/usr/lib/bsmtp/bsmtp -t$nexthop -f$sender $recipient
scalemail-backend unix        -        n        n        -        2        pipe
  flags=R user=scalemail argv=/usr/lib/scalemail/bin/scalemail-store ${nexthop} ${user} ${extension}
mailman  unix  -      n      n      -      -      pipe
  flags=FR user=list argv=/usr/lib/mailman/bin/postfix-to-mailman.py
  ${nexthop} ${user}
dovecot  unix  -      n      n      -      -      pipe
  flags=DRhu user=vmail:vmail argv=/usr/lib/dovecot/deliver -d ${recipient}
spamassassin unix -    n      n      -      -      pipe
        user=spamd:spamd argv=/usr/bin/spamc -u $(recipient) -e /usr/sbin/sendmail -oi -f ${sender} ${recipient}

amavis unix - - - - 2 smtp
        -o smtp_data_done_timeout=1200
        -o smtp_send_xforward_command=yes

127.0.0.1:10025 inet n - - - - smtpd
        -o content_filter=
        -o local_recipient_maps=
        -o relay_recipient_maps=
        -o smtpd_restriction_classes=
        -o smtpd_client_restrictions=
        -o smtpd_helo_restrictions=
        -o smtpd_sender_restrictions=
        -o smtpd_recipient_restrictions=permit_mynetworks,reject
        -o mynetworks=127.0.0.0/8
        -o strict_rfc821_envelopes=yes
        -o receive_override_options=no_unknown_recipient_checks,no_header_body_checks
        -o smtpd_bind_address=127.0.0.1

I would appreciate any help.

till 4th August 2011 11:58

amavisd is a replacement for spamassassin, as it uses spamassassin internally. So running a separate spamassassin beside amavis makes no sense. Using policyd is not problem.

Regarding the error that you get, it seems as if you configured your postfix to require tls. But the internal connection to amavisd does not need tls and amavisd does not support tls for the internal mail exchange with postfix. So you should remove the tls reqzirement in your main.cf.

osterhase 4th August 2011 13:47

I totally agree that an TLS-Encryption on a loopback interface is a waste of processor time. But the consequence to shut down the entire TLS-Encryption for the server is a major hit on the security concept.

Instead I disabled the tls-encryption for the amavis loopback in the master.cf:

Code:

amavis unix - - - - 2 smtp
        -o smtp_data_done_timeout=1200
        -o smtp_send_xforward_command=yes
        -o smtp_tls_security_level=none

127.0.0.1:10025 inet n - - - - smtpd
        -o content_filter=
        -o local_recipient_maps=
        -o relay_recipient_maps=
        -o smtpd_restriction_classes=
        -o smtpd_client_restrictions=
        -o smtpd_helo_restrictions=
        -o smtpd_sender_restrictions=
        -o smtpd_recipient_restrictions=permit_mynetworks,reject
        -o mynetworks=127.0.0.0/8
        -o strict_rfc821_envelopes=yes
        -o receive_override_options=no_unknown_recipient_checks,no_header_body_checks
        -o smtpd_bind_address=127.0.0.1
        -o smtp_tls_security_level=none

Thanks for giving me the punch into the right direction. ;-)


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