• Sunday January 25th, 2015 - admin

    Migration root disk into mirror in LVM

    I’ve found several manuals describing how to add second disk to Volume Group and transform it into mirror. This does not looks complex, and everyone can do it, when everything is working like described in documentation. The problems start when something goes wrong, and one of steps failed. In my environment there is virtual machine […]

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  • startssl

    Sunday August 3rd, 2014 - admin

    Trusted certificates for free – StartSSL

    How many times did you see a pop-up message “Security certificate of this site is not trusted!”? We are used to it, and most of people even don’t check who is Certificate Authority and for who is certificate issued. Just click and confirms that they know the risk. This is not proper behavior, because the […]

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  • Thursday September 20th, 2012 - admin

    Error with FreeRADIUS 2.2.0 compilation on Solaris 10

    I encountered an error during compilation of FreeRADIUS 2.2.0 on Solaris 10 SPARC with SunStudio. That was an undefined symbol lt_preloaded_symbols in modules.o. Error message was:

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  • Saturday August 18th, 2012 - admin

    Postscreen – Greylisting in Postfix

    Greylisting is well known antispam technique. It’s idea basing on fact, that spamming hosts (zombies) doesn’t have time for retransmission and trying to send maximum amount of spam in shortest time period. This is achieved by connections to different mail servers and submission of message even without wait for server’s response. In opposition to that, […]

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  • Thursday August 16th, 2012 - admin

    Mail system implementation

    My experience, which I gained during implementation of different systems shows, that implementation should be done in stages. Then, at each stage you can see if it works, if there are some fields to improve and then go to the next stage of implementation. Mail system implementation is not exception. We can divide this into […]

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  • Wednesday July 11th, 2012 - admin

    Postfix – compilation

    Postfix does not have a configure script, so you need to add proper paths and libraries when you creating Makefiles (make makefiles). I must admit, that Postfix code is one of the least problematic code to compile on differents systems. To make my compilations reproducible, I wrote a script and set proper options for compilation. […]

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  • Friday July 6th, 2012 - admin

    Pigeonhole – compilation and installation

    You can download Pigeonhole for Dovecot from http://pigeonhole.dovecot.org/download.html

    % wget http://www.rename-it.nl/dovecot/2.1/dovecot-2.1-pigeonhole-0.3.1.tar.gz
    % tar -xf dovecot-2.1-pigeonhole-0.3.1.tar.gz

    This is my script to configure and compile Pigeonhole 0.3.1 for Dovecot 2.1

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  • Omówienie

    Pigeonhole jest nazwą projektu, który implementuje wsparcie dla języka Sieve (RFC 5228) oraz protokołu ManageSieve (RFC 5804) do Bezpiecznego serwera IMAP Dovecot. W literalnym znaczeniu pigeonhole jest dziurą lub wnęką wewnątrz gołębnika dla gniazd gołębi. Jest to również nazwa jednej z serii małych, otwartych przedziałów w szafie używanej do przechowywania lub sortowania poczty. Jako czasownik, opisuje czynność wkładania przedmiotu do jednej z tych szuflad. Nazwa ‘Pigeonhole’ zatem dość dobrze opisuje ważną część funkcjonalności, którą ten projekt dodaje do Dovecota: sortowanie i umieszczanie wiadomości e-mail.

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  • Thursday July 5th, 2012 - admin

    OpenSSL – compilation and installation

    OpenSSL 1.0.1c is a security fix release, see: http://openssl.org/news/secadv_20120510.txt I compiled it on Solaris SPARC with use of SunStudio compiler. At first I patch a little a Configure script: % cd openssl-1.0.1c % cp Configure Configure.orig % gpatch -p0 –dry-run –verbose < ../Configure-1.0.1a.diff Hmm… Looks like a unified diff to me… The text leading up […]

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  • Friday June 29th, 2012 - admin

    How to remove mail from Postfix queue

    Sometimes you need to remove some mail from queue or do other things in shell. For experienced administrators this is not a problem, but I decided to write some usable shell commands and scripts for less experienced users. Here are few commands to remove mail from Postfix queue. Don’t ask me why – just for […]

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