Author: drfugazi

OpenDJ – online schema modification

I wrote before about schema conversion to LDIF format and how to add schemas offline by uploading them to config/schema directory in OpenDJ. Now I will describe how to extend schema online, without restart...


Clam AntiVirus is an open source (GPL) anti-virus toolkit for UNIX, designed especially for e-mail scanning on mail gateways. It provides a number of utilities including a flexible and scalable multi-threaded daemon, a command...


The OpenSSL Project is a collaborative effort to develop a robust, commercial-grade, full-featured, and Open Source toolkit implementing the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) protocols as well as...


Dovecot is an open source IMAP and POP3 email server for Linux/UNIX-like systems, written with security primarily in mind. Dovecot is an excellent choice for both small and large installations. It’s fast, simple to set up, requires no special administration and it uses very little memory.

GnuPG for Windows or Gpg4win

Gpg4win (GNU Privacy Guard for Windows) is an encryption software for files and emails.

What is Gpg4win?

Gpg4win enables users to securely transport emails and files with the help of encryption and digital signatures. Encryption protects the contents against an unwanted party reading it. Digital signatures make sure that it was not modified and comes from a specific sender.

The GNU Privacy Guard (GnuPG)

Sometimes you need to encrypt some files or messages to prevent accessing them by unathorized persons. There are several standards and software for this purpose, but the most popular standard that adopted on the...

LDAP meta directory

Sometimes you need to combine two or more LDAP directories with same suffixes to one directory or you just need to have a proxy. My first attempts to combine two OpenLDAP directories was to make replication from two different sources. This solution however has some disadvantages. First of all: to have syncprov replication your environment must be uniform, this means all source servers and proxy needs to be OpenLDAP. Second: I observed that this is not so stable, because of mentioned earlier issues with OpenLDAP replication.

Unique attributes in OpenDJ

Sometimes you need to set some attributes as unique, for example: if LDAP contains system users, then uid attribute shouldn’t repeat in whole system. OpenDJ is equipped with proper plugin, but it’s not enabled...

Cyanogen Froyo for X10 Mini Pro

This is a description of upgrade Sony Ericsson Xperia X10 Mini Pro to newest available for now version of Cyanogen Froyo system developed by XDA Developers.

I will perform update from CM 5.0 Final Release, because I have already done upgrade to CM 5.0 from the factory supplied X10 Mini Pro Android v 2.1. The fact is that the first update conferred the most trouble, because you need to ‘root’ your smartphone, install xRecovery software, and then go for upgrade. However, for now I describe the process of upgrading from 5.0 to 6.01.

Mail delivery configuration with LDAP

(Polski) Ostatnim razem pisałem o uwierzytelnianiu użytkowników w katalogu LDAP aby umożliwiać im odbieranie i nadawanie poczty. Teraz nadszedł czas aby skonfigurować Postfixa aby dostarczał pocztę do właściwych skrzynek.
Jeśli sam kompilujesz Postfixa musisz pamiętać o dodaniu do niego wsparcia dla LDAP. Mój opis tym razem bazuje na Ubuntu, więc trzeba tylko zainstalować odpowiedni pakiet postfix-ldap:
$ sudo -i
# apt-get install postfix-ldap
To załatwi sprawę wsparcia map ldap: w Postfixie.
Teraz idziemy do konfiguracji Postfixa: