private/dnsblog service: Resource temporarily unavailable
Patrick Westenberg
pw at wk-serv.de
Mo Nov 11 10:56:38 CET 2019
Hallo zusammen,
seit ein paar Tagen habe ich mehrmals am Tag das Problem, dass meine
Mailserver durch sehr hohen Load nicht mehr reagieren.
Im Log tauchen zu dem Zeitpunkt immer folgende Meldungen auf:
Nov 11 09:33:45 mx02 postfix/postscreen[7592]: warning:
psc_dnsbl_request: connect to private/dnsblog service: Resource
temporarily unavailable
Nov 11 09:33:45 mx02 postfix/postscreen[7592]: warning:
psc_dnsbl_request: connect to private/dnsblog service: Resource
temporarily unavailable
Nov 11 09:33:45 mx02 postfix/postscreen[7592]: warning:
psc_dnsbl_request: connect to private/dnsblog service: Resource
temporarily unavailable
Nov 11 09:33:45 mx02 postfix/postscreen[7592]: warning:
psc_dnsbl_request: connect to private/dnsblog service: Resource
temporarily unavailable
Nennenswert mehr Verbindungsversuche als zu anderen Zeitpunkten gibt es
nicht wenn das auftritt, aber es scheint dnsblog dennoch auszulasten.
Auf den Systemen läuft jeweils unbound als lokaler Caching-Nameserver.
Kann man dnsblog irgendwie tunen?
Gruß
Patrick
# 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 - - - 1 postscreen
smtpd pass - - - - - smtpd
-o receive_override_options=no_address_mappings
-o smtpd_proxy_filter=127.0.0.1:10024
dnsblog unix - - - - 0 dnsblog
tlsproxy unix - - - - 0 tlsproxy
#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 ${recipient}
#
# See the Postfix UUCP_README file for configuration details.
#
uucp unix - n n - - pipe
flags=Fqhu user=uucp argv=uux -r -n -z -a$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}
127.0.0.1:10025 inet n - n - - smtpd
-o content_filter=
-o smtpd_proxy_filter=
lmtps unix - - - - - lmtp
-o lmtp_use_tls=yes
-o lmtp_enforce_tls=yes
-o lmtp_tls_mandatory_protocols=!SSLv2,!SSLv3
-o lmtp_tls_protocols=!SSLv2,!SSLv3
-o lmtp_tls_mandatory_ciphers=high
-o lmtp_tls_ciphers=high
-o lmtp_send_xforward_command=yes
-o lmtp_tls_security_level=encrypt
-o lmtp_tls_note_starttls_offer=yes
-o lmtp_address_preference=ipv4
# -o lmtp_tls_mandatory_exclude_ciphers=aNULL, eNULL, EXPORT, DES, RC4,
MD5, PSK, aECDH, EDH-DSS-DES-CBC3-SHA, EDH-RSA-DES-CBC3-SHA, KRB5-DES,
CBC3-SHA
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
append_dot_mydomain = no
biff = no
bounce_queue_lifetime = 1d
broken_sasl_auth_clients = yes
default_privs = vmail
inet_interfaces = 83.149.67.233,[2001:1af8:3100:b010:20:2:2:1]
inet_protocols = all
lmtp_bind_address = 172.17.1.52
mailbox_size_limit = 0
maximal_queue_lifetime = 3d
message_size_limit = 104857600
milter_default_action = tempfail
mydestination = mx02.wk-serv.net, localhost
myhostname = mx02.wk-serv.net
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
myorigin = /etc/mailname
non_smtpd_milters = inet:127.0.0.1:22500
postscreen_access_list = permit_mynetworks
postscreen_cache_cleanup_interval = 0
postscreen_cache_map = memcache:/etc/postfix/postscreen_cache
postscreen_dnsbl_action = drop
postscreen_dnsbl_sites = zen.spamhaus.org, bl.spamcop.net,
ix.dnsbl.manitu.net, b.barracudacentral.org, bl.blocklist.de,
bl.mailspike.net, dnsbl.sorbs.net
postscreen_dnsbl_threshold = 3
postscreen_greet_action = drop
postscreen_greet_banner = $smtpd_banner
postscreen_greet_wait = 6s
proxy_write_maps = proxy:btree:/var/lib/postfix/postscreen_cache
readme_directory = no
recipient_bcc_maps = hash:/etc/postfix/bcc_maps
recipient_delimiter = +
relay_domains = proxy:pgsql:/etc/postfix/transport_maps.pgsql
sender_bcc_maps = hash:/etc/postfix/bcc_maps
smtp_dns_support_level = dnssec
smtp_tls_exclude_ciphers = aNULL, eNULL, EXPORT, DES, RC4, MD5, PSK,
aECDH, EDH-DSS-DES-CBC3-SHA, EDH-RSA-DES-CBC3-SHA, KRB5-DES, CBC3-SHA
smtp_tls_loglevel = 1
smtp_tls_mandatory_exclude_ciphers = aNULL, eNULL, EXPORT, DES, RC4,
MD5, PSK, aECDH, EDH-DSS-DES-CBC3-SHA, EDH-RSA-DES-CBC3-SHA, KRB5-DES,
CBC3-SHA
smtp_tls_mandatory_protocols = !SSLv2,!SSLv3
smtp_tls_note_starttls_offer = yes
smtp_tls_protocols = !SSLv2,!SSLv3
smtp_tls_security_level = dane
smtp_use_tls = yes
smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
smtpd_milters = inet:127.0.0.1:22500
smtpd_recipient_restrictions = reject_non_fqdn_sender,
reject_non_fqdn_recipient, reject_unknown_sender_domain,
reject_unknown_recipient_domain, permit_mynetworks,
reject_unverified_recipient, reject_unauth_destination,
check_policy_service inet:dovecot-backends.wk-serv.net:12340, permit
smtpd_sasl_auth_enable = yes
smtpd_sasl_path = private/auth
smtpd_sasl_security_options = noanonymous
smtpd_sasl_type = dovecot
smtpd_tls_CAfile = /etc/ssl/certs/intermediate.pem
smtpd_tls_CApath = /etc/ssl/certs
smtpd_tls_cert_file = /etc/ssl/certs/mx02_wk-serv_net.crt
smtpd_tls_dh1024_param_file = /etc/postfix/dh1024.pem
smtpd_tls_dh512_param_file = /etc/postfix/dh512.pem
smtpd_tls_key_file = /etc/ssl/private/mx02_wk-serv_net.key
smtpd_tls_loglevel = 1
smtpd_tls_mandatory_ciphers = high
smtpd_tls_mandatory_protocols = !SSLv2,!SSLv3
smtpd_tls_protocols = !SSLv2,!SSLv3
smtpd_tls_received_header = yes
smtpd_tls_security_level = may
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtpd_use_tls = yes
tls_preempt_cipherlist = yes
transport_maps = proxy:pgsql:/etc/postfix/transport_maps.pgsql
virtual_alias_maps =
proxy:pgsql:/etc/postfix/virtual_mailbox_forwardings.pgsql
--
Westenberg + Kueppers GbR Spanische Schanzen 37
---- Buero Koeln ---- 47495 Rheinberg
pwestenberg at wk-serv.de Tel.: +49 (0)2843 90369-06
http://www.wk-serv.de Fax : +49 (0)2843 90369-07
Gesellschafter: Sebastian Kueppers & Patrick Westenberg
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