Serveradministration

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This is a guide to installing OpenDKIM for multiple domains on a Postfix-installtion on Debian. I tried some other guides but kept running into problems, so this is how I did it.

Among others, Google Gmail and Yahoo mail check your email for a DKIM signature.

Install and Configure OpenDKIM

1. Install OpenDKIM

apt-get install opendkim

Comment: This will install the latest available stable Debian packaged version of OpenDKIM which is currently 2.0.1. This version is already a couple of years old (2010).
If you know how/want to compile sources yourself, then the latest version is 2.4.3 (and 2.5.0 is right around the corner)

Starten des DNS

/etc/init.d/bind9 start 

/etc/init.d/bind9 restart

Mail-Queue

mailq | less 

postcat -q MAILID

mailq | egrep '^--' 

postsuper -d ALL

Fail2Ban anpassen

MANUAL 0 8 - Fail2ban

Dort speziell:

Mit Fail2ban monitoring Fail2ban - Whyscream den Skriptkiddies das Leben schwer machen.

Upload Speicher begrenzt auf 128k bzw. 131071b:

https://www.howtoforge.com/apache2-mod_fcgid-http-request-length-exceeds-maxrequestlen

nano /etc/apache2/mods-available/fcgid.conf

FcgidMaxRequestLen  2097152 # netspricht 2M

service apache2 restart

Die Timezone für ISPConf ist per default UTC. Wenn der Server / Ubuntu-Linux anders konfiguriert ist muss die Timezone geändert werden. 

Prüfen mit:

date +%Z # timezone name

Als regexpression funltioniert:
^\[.*]* \[client <HOST>:[0-9]+\] mod_fcgid: stderr: user .* joomla authentication failure, referer: .*

Testen:

fail2ban-regex /var/log/ispconf/httpd/uwhh.de/error.log /etc/fail2ban/filter.d/joomla-error.conf

fail2ban-client reload

lade modul:

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