Sicherheitsprobleme mit Postifx etc.

night182 · 15. November 2010

Hallo,

ich erhielt vor kurzem eine Nachricht von Netcup in der man mich darauf hinwies, dass über meinen vServer Spammails verschickt werden. Ich kann dafür garantieren das ich lediglich meiner Familie Zugriff zum Server gewähre. Leider habe ich keine Einträge zu den betroffenen Emailadressen (die ich nie angelegt habe) gefunden. Ich verwende Postfix und Dovecot, leite meine Mails aber seit Kurzem per MX-Eintrag zu Google Mail um.

Ich habe lediglich in den unten angehängten Dateien verdächtige Einträge gefunden. Vor allem der Eintrag von EnlargePenis scheint mir auffällig zu sein.

Was kann ich dagegen unternehmen?

Inhalt der /var/log/mail.info (Ausschnitte):

Code

Nov 15 10:09:56 <meinServer> postfix/smtp[18005]: connect to eftps.gov[216.66.209.176]: Connection timed out (port 25)
Nov 15 10:09:56 <meinServer> postfix/smtp[18002]: 9DD6871A262: to=<user29933@lws02.ldn5.groupnbt.net>, relay=none, delay=241162, delays=241141/0.01/21/0, dsn=4.4.1, status=deferred (connect to lws02.ldn5.groupnbt.net[62.128.158.5]: Connection timed out)




Nov 15 10:09:56 <meinServer> postfix/smtp[18004]: ACA0871A0D9: to=<customers2615@eftps.gov>, relay=none, delay=135157, delays=135136/0.01/21/0, dsn=4.4.1, status=deferred (connect to eftps.gov[216.66.209.176]: Connection timed out)
Nov 15 10:09:56 <meinServer> postfix/smtp[18003]: 7DEBF71A1B9: to=<customers6645@eftps.gov>, relay=none, delay=71153, delays=71132/0.01/21/0, dsn=4.4.1, status=deferred (connect to eftps.gov[216.66.209.176]: Connection timed out)
Nov 15 10:09:56 <meinServer> postfix/smtp[18005]: 648DF71A5DD: to=<customers9602@eftps.gov>, relay=none, delay=142159, delays=142138/0.01/21/0, dsn=4.4.1, status=deferred (connect to eftps.gov[216.66.209.176]: Connection timed out)
Nov 15 10:10:52 <meinServer> postfix/virtual[19418]: fatal: main.cf configuration error: virtual_mailbox_limit is smaller than message_size_limit




Nov 15 10:26:09 <meinServer> postfix/master[16126]: warning: process /usr/lib/postfix/virtual pid 4309 exit status 1
Nov 15 10:26:09 <meinServer> postfix/master[16126]: warning: /usr/lib/postfix/virtual: bad command startup -- throttling
Nov 15 10:26:15 <meinServer> postfix/qmgr[16164]: 8D40F71A1A7: from=<>, size=5004, nrcpt=1 (queue active)
Nov 15 10:26:36 <meinServer> postfix/smtp[4315]: connect to eftps.gov[216.66.209.176]: Connection timed out (port 25)
Nov 15 10:26:36 <meinServer> postfix/smtp[4315]: 8D40F71A1A7: to=<customers7921@eftps.gov>, relay=none, delay=164159, delays=164138/0.01/21/0, dsn=4.4.1, status=deferred (connect to eftps.gov[216.66.209.176]: Connection timed out)
Nov 15 10:27:09 <meinServer> postfix/virtual[5442]: fatal: main.cf configuration error: virtual_mailbox_limit is smaller than message_size_limit




140137/0.01/21/0, dsn=4.4.1, status=deferred (connect to eftps.gov[216.66.209.176]: Connection timed out)
Nov 15 11:33:17 <meinServer> postfix/smtp[23210]: 648DF71A5DD: to=<customers9602@eftps.gov>, relay=none, delay=147160, delays=147139/0.01/21/0, dsn=4.4.1, status=deferred (connect to eftps.gov[216.66.209.176]: Connection timed out)
Nov 15 11:33:17 <meinServer> postfix/smtp[23208]: 7DEBF71A1B9: to=<customers6645@eftps.gov>, relay=none, delay=76154, delays=76132/0.01/21/0, dsn=4.4.1, status=deferred (connect to eftps.gov[216.66.209.176]: Connection timed out)
Nov 15 11:33:17 <meinServer> postfix/smtp[23207]: 9DD6871A262: to=<user29933@lws02.ldn5.groupnbt.net>, relay=none, delay=246163, delays=246142/0.01/21/0, dsn=4.4.1, status=deferred (connect to lws02.ldn5.groupnbt.net[62.128.158.5]: Connection timed out)




Nov 15 11:49:32 <meinServer> postfix/master[16126]: warning: process /usr/lib/postfix/virtual pid 9350 exit status 1
Nov 15 11:49:32 <meinServer> postfix/master[16126]: warning: /usr/lib/postfix/virtual: bad command startup -- throttling
Nov 15 11:49:36 <meinServer> postfix/qmgr[16164]: 8D40F71A1A7: from=<>, size=5004, nrcpt=1 (queue active)
Nov 15 11:49:57 <meinServer> postfix/smtp[9354]: connect to eftps.gov[216.66.209.176]: Connection timed out (port 25)
Nov 15 11:49:57 <meinServer> postfix/smtp[9354]: 8D40F71A1A7: to=<customers7921@eftps.gov>, relay=none, delay=169160, delays=169139/0.01/21/0, dsn=4.4.1, status=deferred (connect to eftps.gov[216.66.209.176]: Connection timed out)
Nov 15 11:50:32 <meinServer> postfix/virtual[10696]: fatal: main.cf configuration error: virtual_mailbox_limit is smaller than message_size_limit

Alles anzeigen

night182 · 15. November 2010

Inhalt der /var/log/mail.log (Ausschnitte):

Code

Nov 15 10:17:01 <meinServer> postfix/qmgr[16164]: B6F4C71A61B:  from=<root@<meinServer>.yourvserver.net>, size=661, nrcpt=1  (queue active)
Nov 15 10:17:01 <meinServer> postfix/local[26691]: B6F4C71A61B:  to=<root@<meinServer>.yourvserver.net>,  orig_to=<root>, relay=local, delay=0.08, delays=0.05/0.01/0/0.02,  dsn=2.0.0, status=sent (delivered to mailbox)
Nov 15 10:17:01 <meinServer> postfix/qmgr[16164]: B6F4C71A61B: removed




Nov 15 10:26:09 <meinServer> postfix/master[16126]: warning: process /usr/lib/postfix/virtual pid 4309 exit status 1
Nov 15 10:26:09 <meinServer> postfix/master[16126]: warning: /usr/lib/postfix/virtual: bad command startup -- throttling
Nov 15 10:26:15 <meinServer> postfix/qmgr[16164]: 8D40F71A1A7: from=<>, size=5004, nrcpt=1 (queue active)
Nov 15 10:26:36 <meinServer> postfix/smtp[4315]: connect to eftps.gov[216.66.209.176]: Connection timed out (port 25)
Nov 15 10:26:36 <meinServer> postfix/smtp[4315]: 8D40F71A1A7:  to=<customers7921@eftps.gov>, relay=none, delay=164159,  delays=164138/0.01/21/0, dsn=4.4.1, status=deferred (connect to  eftps.gov[216.66.209.176]: Connection timed out)
Nov 15 10:27:09 <meinServer> postfix/virtual[5442]: fatal: main.cf  configuration error: virtual_mailbox_limit is smaller than  message_size_limit
Nov 15 11:17:00 <meinServer> postfix/master[16126]: warning: process /usr/lib/postfix/virtual pid 3584 exit status 1
Nov 15 11:17:00 <meinServer> postfix/master[16126]: warning: /usr/lib/postfix/virtual: bad command startup -- throttling
Nov 15 11:17:01 <meinServer> postfix/pickup[1930]: EEDB071A61B: uid=0 from=<root>
Nov 15 11:17:01 <meinServer> postfix/cleanup[4034]: EEDB071A61B:  message-id=<20101115101701.EEDB071A61B@<meinServer>.yourvserver.net>
Nov 15 11:17:01 <meinServer> postfix/qmgr[16164]: EEDB071A61B:  from=<root@<meinServer>.yourvserver.net>, size=661, nrcpt=1  (queue active)
Nov 15 11:17:02 <meinServer> postfix/local[4036]: EEDB071A61B:  to=<root@<meinServer>.yourvserver.net>,  orig_to=<root>, relay=local, delay=0.07, delays=0.05/0.01/0/0.01,  dsn=2.0.0, status=sent (delivered to mailbox)
Nov 15 11:17:02 <meinServer> postfix/qmgr[16164]: EEDB071A61B: removed
Nov 15 11:18:00 <meinServer> postfix/virtual[5184]: fatal: main.cf  configuration error: virtual_mailbox_limit is smaller than  message_size_limit




Nov 15 11:32:15 <meinServer> postfix/master[16126]: warning: process /usr/lib/postfix/virtual pid 22598 exit status 1
Nov 15 11:32:15 <meinServer> postfix/master[16126]: warning: /usr/lib/postfix/virtual: bad command startup -- throttling
Nov 15 11:32:55 <meinServer> postfix/qmgr[16164]: 9DD6871A262: from=<>, size=5065, nrcpt=1 (queue active)
Nov 15 11:32:55 <meinServer> postfix/qmgr[16164]: 7DEBF71A1B9: from=<>, size=4417, nrcpt=1 (queue active)
Nov 15 11:32:55 <meinServer> postfix/qmgr[16164]: ACA0871A0D9: from=<>, size=4530, nrcpt=1 (queue active)
Nov 15 11:32:55 <meinServer> postfix/qmgr[16164]: 648DF71A5DD: from=<>, size=4502, nrcpt=1 (queue active)
Nov 15 11:33:15 <meinServer> postfix/virtual[23861]: fatal:  main.cf configuration error: virtual_mailbox_limit is smaller than  message_size_limit
Nov 15 11:33:16 <meinServer> postfix/master[16126]: warning: process /usr/lib/postfix/virtual pid 23861 exit status 1
Nov 15 11:33:16 <meinServer> postfix/master[16126]: warning: /usr/lib/postfix/virtual: bad command startup -- throttling
Nov 15 11:33:17 <meinServer> postfix/smtp[23210]: connect to eftps.gov[216.66.209.176]: Connection timed out (port 25)
Nov 15 11:33:17 <meinServer> postfix/smtp[23207]: connect to  lws02.ldn5.groupnbt.net[62.128.158.5]: Connection timed out (port 25)
Nov 15 11:33:17 <meinServer> postfix/smtp[23208]: connect to eftps.gov[216.66.209.176]: Connection timed out (port 25)
Nov 15 11:33:17 <meinServer> postfix/smtp[23209]: connect to eftps.gov[216.66.209.176]: Connection timed out (port 25)
Nov 15 11:33:17 <meinServer> postfix/smtp[23209]: ACA0871A0D9:  to=<customers2615@eftps.gov>, relay=none, delay=140158,  delays=140137/0.01/21/0, dsn=4.4.1, status=deferred (connect to  eftps.gov[216.66.209.176]: Connection timed out)
Nov 15 11:33:17 <meinServer> postfix/smtp[23210]: 648DF71A5DD:  to=<customers9602@eftps.gov>, relay=none, delay=147160,  delays=147139/0.01/21/0, dsn=4.4.1, status=deferred (connect to  eftps.gov[216.66.209.176]: Connection timed out)
Nov 15 11:33:17 <meinServer> postfix/smtp[23208]: 7DEBF71A1B9:  to=<customers6645@eftps.gov>, relay=none, delay=76154,  delays=76132/0.01/21/0, dsn=4.4.1, status=deferred (connect to  eftps.gov[216.66.209.176]: Connection timed out)
Nov 15 11:33:17 <meinServer> postfix/smtp[23207]: 9DD6871A262:  to=<user29933@lws02.ldn5.groupnbt.net>, relay=none, delay=246163,  delays=246142/0.01/21/0, dsn=4.4.1, status=deferred (connect to  lws02.ldn5.groupnbt.net[62.128.158.5]: Connection timed out)




Nov 15 11:38:21 <meinServer> postfix/master[16126]: warning: process /usr/lib/postfix/virtual pid 29241 exit status 1
Nov 15 11:38:21 <meinServer> postfix/master[16126]: warning: /usr/lib/postfix/virtual: bad command startup -- throttling
Nov 15 11:38:41 <meinServer> postfix/smtpd[29782]: connect from unknown[186.122.248.247]
Nov 15 11:38:42 <meinServer> postfix/smtpd[29782]: NOQUEUE:  reject: RCPT from unknown[186.122.248.247]: 450 4.7.1 Client host  rejected: cannot find your hostname, [186.122.248.247];  from=<EnlargePenis.pleased2@yahoo.com> to=<info@czar1.de>  proto=SMTP helo=<produccion>
Nov 15 11:38:42 <meinServer> postfix/smtpd[29782]: lost connection after RCPT from unknown[186.122.248.247]
Nov 15 11:38:42 <meinServer> postfix/smtpd[29782]: disconnect from unknown[186.122.248.247]
Nov 15 11:39:21 <meinServer> postfix/virtual[30605]: fatal:  main.cf configuration error: virtual_mailbox_limit is smaller than  message_size_limit




Nov 15 11:41:24 <meinServer> postfix/master[16126]: warning: process /usr/lib/postfix/virtual pid 520 exit status 1
Nov 15 11:41:24 <meinServer> postfix/master[16126]: warning: /usr/lib/postfix/virtual: bad command startup -- throttling
Nov 15 11:42:02 <meinServer> postfix/anvil[29793]: statistics: max  connection rate 1/60s for (smtp:186.122.248.247) at Nov 15 11:38:41
Nov 15 11:42:02 <meinServer> postfix/anvil[29793]: statistics: max  connection count 1 for (smtp:186.122.248.247) at Nov 15 11:38:41
Nov 15 11:42:02 <meinServer> postfix/anvil[29793]: statistics: max cache size 1 at Nov 15 11:38:41
Nov 15 11:42:24 <meinServer> postfix/virtual[1577]: fatal: main.cf  configuration error: virtual_mailbox_limit is smaller than  message_size_limit




Nov 15 11:49:32 <meinServer> postfix/master[16126]: warning: process /usr/lib/postfix/virtual pid 9350 exit status 1
Nov 15 11:49:32 <meinServer> postfix/master[16126]: warning: /usr/lib/postfix/virtual: bad command startup -- throttling
Nov 15 11:49:36 <meinServer> postfix/qmgr[16164]: 8D40F71A1A7: from=<>, size=5004, nrcpt=1 (queue active)
Nov 15 11:49:57 <meinServer> postfix/smtp[9354]: connect to eftps.gov[216.66.209.176]: Connection timed out (port 25)
Nov 15 11:49:57 <meinServer> postfix/smtp[9354]: 8D40F71A1A7:  to=<customers7921@eftps.gov>, relay=none, delay=169160,  delays=169139/0.01/21/0, dsn=4.4.1, status=deferred (connect to  eftps.gov[216.66.209.176]: Connection timed out)
Nov 15 11:50:32 <meinServer> postfix/virtual[10696]: fatal:  main.cf configuration error: virtual_mailbox_limit is smaller than  message_size_limit




Nov 15 12:04:48 <meinServer> postfix/master[16126]: warning: process /usr/lib/postfix/virtual pid 26405 exit status 1
Nov 15 12:04:48 <meinServer> postfix/master[16126]: warning: /usr/lib/postfix/virtual: bad command startup -- throttling
Nov 15 12:05:42 <meinServer> postfix/smtpd[27895]: connect from 114-45-53-77.dynamic.hinet.net[114.45.53.77]
Nov 15 12:05:43 <meinServer> postfix/smtpd[27895]: NOQUEUE:  reject: RCPT from 114-45-53-77.dynamic.hinet.net[114.45.53.77]: 450  4.7.1 <meineIP>: Helo command rejected: Host not found;  from=<z2007tw@yahoo.com.tw> to=<vkihwpdh@yahoo.com.tw>  proto=SMTP helo=<meineIP>
Nov 15 12:05:44 <meinServer> postfix/smtpd[27895]: lost connection  after RCPT from 114-45-53-77.dynamic.hinet.net[114.45.53.77]
Nov 15 12:05:44 <meinServer> postfix/smtpd[27895]: disconnect from 114-45-53-77.dynamic.hinet.net[114.45.53.77]
Nov 15 12:05:48 <meinServer> postfix/virtual[27916]: fatal:  main.cf configuration error: virtual_mailbox_limit is smaller than  message_size_limit




Nov 15 12:09:04 <meinServer> postfix/anvil[27900]: statistics: max  connection count 1 for (smtp:114.45.53.77) at Nov 15 12:05:42
Nov 15 12:09:04 <meinServer> postfix/anvil[27900]: statistics: max cache size 1 at Nov 15 12:05:42
Nov 15 12:09:52 <meinServer> postfix/virtual[32479]: fatal:  main.cf configuration error: virtual_mailbox_limit is smaller than  message_size_limit

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perryflynn · 15. November 2010

Mach mal einen Relay Check: http://www.abuse.net/relay.html
Und poste mal deine main.cf und die master.cf.

night182 · 15. November 2010

Hallo,

der anonyme Relay Check auf meinen Server ergab das alle Relay-Anfragen zurückgewiesen wurden. Nachfolgend noch die Dateien main.cf und master.cf:

main.cf:

Code

# Postfix programs paths settings
command_directory = /usr/sbin
daemon_directory = /usr/lib/postfix
program_directory = /usr/lib/postfix
sendmail_path = /usr/sbin/sendmail




## General Postfix configuration
# should be the default domain from your provider eg. "server100.provider.tld"
mydomain = <meinServer>.yourvserver.net




# should be different from $mydomain eg. "mail.$mydomain"
myhostname = <meinServer>.yourvserver.net




mydestination = $myhostname,
    $mydomain,
    localhost.$myhostname,
    localhost.$mydomain,
    localhost
mynetworks = 127.0.0.0/8
inet_interfaces = all
append_dot_mydomain = no
biff = no




# Postfix performance settings
default_destination_concurrency_limit = 20
local_destination_concurrency_limit = 2




# SMTPD Settings
smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
smtpd_helo_required = yes
smtpd_recipient_restrictions = permit_mynetworks,
    permit_sasl_authenticated,
    reject_unauth_destination,
    reject_unauth_pipelining,
    reject_non_fqdn_recipient
smtpd_sender_restrictions = permit_mynetworks,
    permit_sasl_authenticated, 
    reject_unknown_hostname, 
    reject_unknown_recipient_domain, 
    reject_unknown_sender_domain
smtpd_client_restrictions = permit_mynetworks,
    permit_sasl_authenticated,
    reject_unknown_client
# Maximum size of Message in bytes (50MB)
message_size_limit = 52428800




## SASL Auth Settings
smtpd_sasl_auth_enable = yes
smtpd_sasl_local_domain = $myhostname
smtpd_sasl_security_options = noanonymous




broken_sasl_auth_clients = yes
## Dovecot Settings for deliver, SASL Auth and virtual transport
## uncomment those line to use Dovecot
#mailbox_command = /usr/lib/dovecot/deliver
#virtual_transport = dovecot
#dovecot_destination_recipient_limit = 1




# Virtual delivery settings
virtual_mailbox_base = /var/kunden/mail/
virtual_mailbox_maps = mysql:/etc/postfix/mysql-virtual_mailbox_maps.cf
virtual_mailbox_domains = mysql:/etc/postfix/mysql-virtual_mailbox_domains.cf
virtual_alias_maps = mysql:/etc/postfix/mysql-virtual_alias_maps.cf
virtual_uid_maps = static:2000
virtual_gid_maps = static:2000




# Local delivery settings
local_transport = local
alias_database = hash:/etc/aliases
alias_maps = $alias_database




# Default Mailbox size, is set to 0 which means unlimited!
mailbox_size_limit = 50000000 




### TLS settings
###
## TLS for outgoing mails from the server to another server
#smtp_use_tls = yes
#smtp_tls_note_starttls_offer = yes
## TLS for email client
#smtpd_tls_cert_file = /etc/ssl/server/<meinServer>.yourvserver.net.pem
#smtpd_tls_key_file = /etc/ssl/server/<meinServer>.yourvserver.net.pem
#smtpd_tls_CAfile = /etc/ssl/cacert.class3.crt  # Just an example for CACert.org
#smtpd_tls_auth_only = no
#smtpd_tls_loglevel = 1
#smtpd_tls_received_header = yes
#smtpd_tls_session_cache_timeout = 3600s
#tls_random_source = dev:/dev/urandom




debugger_command =
         PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin
         ddd $daemon_directory/$process_name $process_id & sleep 5

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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").
#
# ==========================================================================
# service type  private unpriv  chroot  wakeup  maxproc command + args
#               (yes)   (yes)   (yes)   (never) (100)
# ==========================================================================
smtp      inet  n       -       -       -       -       smtpd
#submission inet n       -       -       -       -       smtpd
#  -o smtpd_enforce_tls=yes
#  -o smtpd_sasl_auth_enable=yes
#  -o smtpd_client_restrictions=permit_sasl_authenticated,reject
#smtps     inet  n       -       -       -       -       smtpd
#  -o smtpd_tls_wrappermode=yes
#  -o smtpd_sasl_auth_enable=yes
#  -o smtpd_client_restrictions=permit_sasl_authenticated,reject
#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  -       -       n       -       -       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
smtp      unix  -       -       -       -       -       smtp
# When relaying mail as backup MX, disable fallback_relay to avoid MX loops
relay     unix  -       -       -       -       -       smtp
    -o fallback_relay=
#       -o smtp_helo_timeout=5 -o smtp_connect_timeout=5
showq     unix  n       -       -       -       -       showq
error     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}

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vmk · 15. November 2010

Die Logauszüge enthalten keinen Hinweis darauf, dass jemand deinen Mailserver missbraucht. In der mail.info steht nur drin, dass ein paar Mails nicht zugestellt werden können.

Hast du vielleicht veraltete Skripte irgendwo laufen? Stichwort: Sicherheitslücken

night182 · 18. November 2010

Danke,
du hattest Recht. Meine Servereinstellungen waren alle in Ordnung. Leider wurde mein Server durch ein unsicheres HTML-Formular teil eines Botnetzes. Ich denke jeder Anfänger muss sowas erstmal erleben, bis er Sicherheitswarnungen ernst nimmt