Disabling ClamAV: Amavis doesn't sign messages (DKIM)

Discussion in 'Installation/Configuration' started by voovode, Nov 20, 2017.

  1. voovode

    voovode New Member

    Hello all,
    Ubuntu 16.04 - 4.4.0-98-generic - 2GB RAM
    ISPConfig 3.1dev

    Followed setup guide as of here:
    https://www.howtoforge.com/tutorial/perfect-server-ubuntu-16-04-nginx-bind-dovecot-and-ispconfig-3/

    Task:
    I want to disable ClamAV for it's ridiculously RAM usage & I`ll set up a cronjob to run once a week or a month or something or not at all.

    Followed that without the amavis part:
    https://www.faqforge.com/linux/cont...ilter-and-antivirus-functions-in-ispconfig-3/

    While doing so, it stops mail signing of amavisd-new and postfix sends mail without a dkim signature!
    Then I started clamav back without freshclam and dkim signatures were back to normal.

    Configuration (ask for more):
    [email protected]:~# cat /etc/postfix/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" or
    # on-line: http://www.postfix.org/master.5.html).
    #
    # Do not forget to execute "postfix reload" after editing this file.
    #
    # ==========================================================================
    # service type  private unpriv  chroot  wakeup  maxproc command + args
    #               (yes)   (yes)   (no)    (never) (100)
    # ==========================================================================
    smtp      inet  n       -       y       -       -       smtpd
    #smtp      inet  n       -       y       -       1       postscreen
    #smtpd     pass  -       -       y       -       -       smtpd
    #dnsblog   unix  -       -       y       -       0       dnsblog
    #tlsproxy  unix  -       -       y       -       0       tlsproxy
    submission inet n       -       y       -       -       smtpd
      -o syslog_name=postfix/submission
      -o smtpd_tls_security_level=encrypt
      -o smtpd_sasl_auth_enable=yes
      -o smtpd_client_restrictions=permit_sasl_authenticated,reject
    #  -o smtpd_reject_unlisted_recipient=no
    #  -o smtpd_client_restrictions=$mua_client_restrictions
    #  -o smtpd_helo_restrictions=$mua_helo_restrictions
    #  -o smtpd_sender_restrictions=$mua_sender_restrictions
    #  -o smtpd_recipient_restrictions=
    #  -o smtpd_relay_restrictions=permit_sasl_authenticated,reject
    #  -o milter_macro_daemon_name=ORIGINATING
    smtps     inet  n       -       y       -       -       smtpd
      -o syslog_name=postfix/smtps
      -o smtpd_tls_wrappermode=yes
      -o smtpd_sasl_auth_enable=yes
      -o smtpd_client_restrictions=permit_sasl_authenticated,reject
    #  -o smtpd_reject_unlisted_recipient=no
    #  -o smtpd_client_restrictions=$mua_client_restrictions
    #  -o smtpd_helo_restrictions=$mua_helo_restrictions
    #  -o smtpd_sender_restrictions=$mua_sender_restrictions
    #  -o smtpd_recipient_restrictions=
    #  -o smtpd_relay_restrictions=permit_sasl_authenticated,reject
    #  -o milter_macro_daemon_name=ORIGINATING
    #628       inet  n       -       y       -       -       qmqpd
    pickup    unix  n       -       y       60      1       pickup
    cleanup   unix  n       -       y       -       0       cleanup
    qmgr      unix  n       -       n       300     1       qmgr
    #qmgr     unix  n       -       n       300     1       oqmgr
    tlsmgr    unix  -       -       y       1000?   1       tlsmgr
    rewrite   unix  -       -       y       -       -       trivial-rewrite
    bounce    unix  -       -       y       -       0       bounce
    defer     unix  -       -       y       -       0       bounce
    trace     unix  -       -       y       -       0       bounce
    verify    unix  -       -       y       -       1       verify
    flush     unix  n       -       y       1000?   0       flush
    proxymap  unix  -       -       n       -       -       proxymap
    proxywrite unix -       -       n       -       1       proxymap
    smtp      unix  -       -       y       -       -       smtp
    relay     unix  -       -       y       -       -       smtp
    #       -o smtp_helo_timeout=5 -o smtp_connect_timeout=5
    showq     unix  n       -       y       -       -       showq
    error     unix  -       -       y       -       -       error
    retry     unix  -       -       y       -       -       error
    discard   unix  -       -       y       -       -       discard
    local     unix  -       n       n       -       -       local
    virtual   unix  -       n       n       -       -       virtual
    lmtp      unix  -       -       y       -       -       lmtp
    anvil     unix  -       -       y       -       1       anvil
    scache    unix  -       -       y       -       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}
    #
    # ====================================================================
    #
    # Recent Cyrus versions can use the existing "lmtp" master.cf entry.
    #
    # Specify in cyrus.conf:
    #   lmtp    cmd="lmtpd -a" listen="localhost:lmtp" proto=tcp4
    #
    # Specify in main.cf one or more of the following:
    #  mailbox_transport = lmtp:inet:localhost
    #  virtual_transport = lmtp:inet:localhost
    #
    # ====================================================================
    #
    # Cyrus 2.1.5 (Amos Gouaux)
    # Also specify in main.cf: cyrus_destination_recipient_limit=1
    #
    #cyrus     unix  -       n       n       -       -       pipe
    #  user=cyrus argv=/cyrus/bin/deliver -e -r ${sender} -m ${extension} ${user}
    #
    # ====================================================================
    # Old example of delivery via Cyrus.
    #
    #old-cyrus unix  -       n       n       -       -       pipe
    #  flags=R user=cyrus argv=/cyrus/bin/deliver -e -m ${extension} ${user}
    #
    # ====================================================================
    #
    # See the Postfix UUCP_README file for configuration details.
    #
    uucp      unix  -       n       n       -       -       pipe
      flags=Fqhu user=uucp argv=uux -r -n -z -a$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 -f ${sender} -d ${user}@${nexthop}
    
    amavis unix - - - - 2 smtp
            -o smtp_data_done_timeout=1200
            -o smtp_send_xforward_command=yes
            -o smtp_bind_address=
    
    
    127.0.0.1:10025 inet n - 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 smtp_send_xforward_command=yes
            -o disable_dns_lookups=yes
    
    
    127.0.0.1:10027 inet n - 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 smtp_send_xforward_command=yes
            -o milter_default_action=accept
            -o milter_macro_daemon_name=ORIGINATING
            -o disable_dns_lookups=yes
    
    I get no errors even if i set $log_level = 5 in 50-user file of amavis service.

    What configuration am I missing here?
    Thanks in advance.
     
  2. voovode

    voovode New Member

    [email protected]:~# cat /etc/postfix/main.cf:
    Code:
    # See /usr/share/postfix/main.cf.dist for a commented, more complete version
    
    
    # Debian specific:  Specifying a file name will cause the first
    # line of that file to be used as the name.  The Debian default
    # is /etc/mailname.
    #myorigin = /etc/mailname
    
    smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
    biff = no
    
    # 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/smtpd.cert
    smtpd_tls_key_file = /etc/postfix/smtpd.key
    smtpd_use_tls = 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.
    
    smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination
    myhostname = exampleserver.example.com
    alias_maps = hash:/etc/aliases, hash:/var/lib/mailman/data/aliases
    alias_database = hash:/etc/aliases, hash:/var/lib/mailman/data/aliases
    myorigin = /etc/mailname
    mydestination = localhost, localhost.localdomain
    relayhost =
    mynetworks = 127.0.0.0/8 [::1]/128
    mailbox_size_limit = 0
    recipient_delimiter = +
    inet_interfaces = all
    inet_protocols = all
    html_directory = /usr/share/doc/postfix/html
    virtual_alias_domains =
    virtual_alias_maps = hash:/var/lib/mailman/data/virtual-mailman, proxy:mysql:/etc/postfix/mysql-virtual_forwardings.cf, proxy:mysql:/etc/postfix/mysql-virtual_email2email.cf
    virtual_mailbox_domains = proxy:mysql:/etc/postfix/mysql-virtual_domains.cf
    virtual_mailbox_maps = proxy:mysql:/etc/postfix/mysql-virtual_mailboxes.cf
    virtual_mailbox_base = /var/vmail
    virtual_uid_maps = mysql:/etc/postfix/mysql-virtual_uids.cf
    virtual_gid_maps = mysql:/etc/postfix/mysql-virtual_gids.cf
    sender_bcc_maps = proxy:mysql:/etc/postfix/mysql-virtual_outgoing_bcc.cf
    smtpd_sasl_auth_enable = yes
    broken_sasl_auth_clients = yes
    smtpd_sasl_authenticated_header = yes
    smtpd_restriction_classes = greylisting
    greylisting = check_policy_service inet:127.0.0.1:10023
    smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination, reject_rbl_client zen.spamhaus.org, check_recipient_access mysql:/etc/postfix/mysql-virtual_recipient.cf, check_recipient_access mysql:/etc/postfix/mysql-virtual_policy_greylist.cf
    smtpd_tls_security_level = may
    transport_maps = hash:/var/lib/mailman/data/transport-mailman, 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_sender_login_maps = proxy:mysql:/etc/postfix/mysql-virtual_sender_login_maps.cf
    proxy_read_maps = $local_recipient_maps $mydestination $virtual_alias_maps $virtual_alias_domains $sender_bcc_maps $virtual_mailbox_maps $virtual_mailbox_domains $relay_recipient_maps $relay_domains $canonical_maps $sender_canonical_maps $recipient_canonical_maps $relocated_maps $transport_maps $mynetworks $smtpd_sender_login_maps
    smtpd_helo_required = yes
    smtpd_helo_restrictions = permit_sasl_authenticated, permit_mynetworks, check_helo_access regexp:/etc/postfix/helo_access, reject_invalid_hostname, reject_non_fqdn_hostname, reject_invalid_helo_hostname, check_helo_access regexp:/etc/postfix/blacklist_helo
    #smtpd_helo_restrictions = permit_sasl_authenticated, permit_mynetworks, check_helo_access regexp:/etc/postfix/helo_access, reject_invalid_hostname, reject_non_fqdn_hostname, reject_invalid_helo_hostname, reject_unknown_helo_hostname, check_helo_access regexp:/etc/postfix/blacklist_helo
    smtpd_sender_restrictions = check_sender_access regexp:/etc/postfix/tag_as_originating.re , permit_mynetworks, permit_sasl_authenticated, check_sender_access mysql:/etc/postfix/mysql-virtual_sender.cf, check_sender_access regexp:/etc/postfix/tag_as_foreign.re
    smtpd_client_restrictions = check_client_access mysql:/etc/postfix/mysql-virtual_client.cf
    smtpd_client_message_rate_limit = 100
    maildrop_destination_concurrency_limit = 1
    maildrop_destination_recipient_limit = 1
    virtual_transport = dovecot
    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
    owner_request_special = no
    smtp_tls_security_level = may
    smtpd_tls_mandatory_protocols = !SSLv2, !SSLv3
    smtpd_tls_protocols = !SSLv2,!SSLv3
    smtp_tls_protocols = !SSLv2,!SSLv3
    smtpd_tls_exclude_ciphers = RC4, aNULL
    smtp_tls_exclude_ciphers = RC4, aNULL
    dovecot_destination_recipient_limit = 1
    smtpd_sasl_type = dovecot
    smtpd_sasl_path = private/auth
    content_filter = amavis:[127.0.0.1]:10024
    receive_override_options = no_address_mappings
    message_size_limit = 0
    
    [email protected]:~# cat /etc/amavis/conf.d/50-user:
    Code:
    use strict;
    
    #
    # Place your configuration directives here.  They will override those in
    # earlier files.
    #
    # See /usr/share/doc/amavisd-new/ for documentation and examples of
    # the directives you can use in this file
    #
    
    @bypass_virus_checks_maps = (
       \%bypass_virus_checks, \@bypass_virus_checks_acl, \$bypass_virus_checks_re);
    
    @bypass_spam_checks_maps = (
       \%bypass_spam_checks, \@bypass_spam_checks_acl, \$bypass_spam_checks_re);
    
    #
    # Database connection settings
    #
    
    @lookup_sql_dsn =
       ( ['DBI:mysql:database=dbispconfig;host=127.0.0.1;port=3306', 'ispconfig', 'aee198aaf16a56de936d0dc85f3359d5'] );
    
    # @storage_sql_dsn = @lookup_sql_dsn;  # none, same, or separate database
    #$sql_select_policy = 'SELECT "Y" as local FROM mail_domain WHERE CONCAT("@",domain) IN (%k)';
    # $banned_files_quarantine_method = 'sql';
    # $spam_quarantine_method         = 'sql';
    
    #
    # SQL Select statements
    #
    
    $sql_select_policy =
       'SELECT *,spamfilter_users.id'.
       ' FROM spamfilter_users LEFT JOIN spamfilter_policy ON spamfilter_users.policy_id=spamfilter_policy.id'.
       ' WHERE spamfilter_users.email IN (%k) ORDER BY spamfilter_users.priority DESC';
    
    
    $sql_select_white_black_list = 'SELECT wb FROM spamfilter_wblist'.
        ' WHERE (spamfilter_wblist.rid=?) AND (spamfilter_wblist.email IN (%k)) AND (spamfilter_wblist.active="y")' .
        ' ORDER BY spamfilter_wblist.priority DESC';
    
    #
    # Quarantine settings
    #
    
    $final_virus_destiny = D_BOUNCE;
    $final_spam_destiny = D_DISCARD;
    $final_banned_destiny = D_BOUNCE;
    $final_bad_header_destiny = D_PASS;
    
    # Default settings, we st this very high to not filter aut emails accidently
    $sa_spam_subject_tag = '***SPAM*** ';
    $sa_tag_level_deflt  = 20.0;  # add spam info headers if at, or above that level
    $sa_tag2_level_deflt = 60.0; # add 'spam detected' headers at that level
    $sa_kill_level_deflt = 60.0; # triggers spam evasive actions
    $sa_dsn_cutoff_level = 100;   # spam level beyond which a DSN is not sent
    
    #
    # Disable spam and virus notifications for the admin user.
    # Can be overridden by the policies in mysql
    #
    
    $virus_admin = undef;
    $spam_admin = undef;
    
    
    #
    # Enable Logging
    #
    
    $DO_SYSLOG = 1;
    $LOGFILE = "/var/log/amavis.log";  # (defaults to empty, no log)
    
    # Set the log_level to 5 for debugging
    $log_level = 0;                # (defaults to 0)
    
    $inet_socket_port = [10024,10026];
    
    # :* = send to incoming Port + 1
    $forward_method = 'smtp:127.0.0.1:*';
    $notify_method = 'smtp:127.0.0.1:*';
    $interface_policy{'10026'} = 'ORIGINATING';
    $policy_bank{'ORIGINATING'} = {
      originating => 1,
      smtpd_discard_ehlo_keywords => ['8BITMIME'],
    };
    
    # IP-Addresses for internal networks => load policy MYNETS
    # - requires -o smtp_send_xforward_command=yes in postfix master.cf
    @mynetworks = qw(0.0.0.0/8 127.0.0.0/8 10.0.0.0/8 172.16.0.0/12 192.168.0.0/16 [::1] [FE80::]/10 [FEC0::]/10);
    
    # Allow SMTP access from IPs in @inet_acl to amvisd SMTP Port
    @inet_acl = qw( 127.0.0.1 [::1] 192.168.0.0/16 );
    
    # DKIM
    $enable_dkim_verification = 1;
    $enable_dkim_signing = 1; # load DKIM signing code
    $signed_header_fields{'received'} = 0;  # turn off signing of Received
    $signed_header_fields{'sender'} = 1;
    @dkim_signature_options_bysender_maps = (
    { '.' => { ttl => 21*24*3600, c => 'relaxed/simple' } } );
    
    #------------ Do not modify anything below this line -------------
    1;  # insure a defined return
    
    [email protected]:~# cat /etc/amavis/conf.d/60-dkim:
    Code:
    dkim_key('example.com', 'default', '/var/lib/amavis/dkim/example.com.private');
    
     
  3. florian030

    florian030 ISPConfig Developer ISPConfig Developer

    The link from faqforge disables the content_scanner in postfix while amavis is used for dkim-signing. You must disable clamav in amavis.
     
  4. voovode

    voovode New Member

    What is the correct way of doing it though?
    Thank you.
     
  5. florian030

    florian030 ISPConfig Developer ISPConfig Developer

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