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Archives pour la catégorie ‘Logiciel’

Create DNS Service Location (SRV) records for the Exchange Autodiscover service

20/01/2024 Comments off

Source: Upwards with SBS

In earlier blog posts I’ve discussed other DNS records such as the TXT SPF record.  This is a new but very important record that you will want in place for your domain.

Here’s a list of great resources that describe this in detail and include guidance to manually create and publish the record to whomever is hosting your DNS records for the domain.

Categories: Logiciel, Réseau Tags: ,

Récupérer le zoom dans OS X Mountain Lion

20/01/2024 Comments off

La dernière mouture en date d’OSX désactive une fonction assez pratique : le zoom.

Son utilisation est possible sur les versions précédentes en maintenant la touche CTRL + scroll.

Pour la réactiver sous OSX Mountain Lion, il suffit d’aller dans les préférences :

  1. Préférences système…
  2. Accessibilité
  3. Réduite/agrandir

Il suffit ensuite de cocher « Pour effectuer un zoom, utilisez le geste de défilement avec les touches de modification : »

Categories: Logiciel Tags: ,

psad: Linux Detect And Block Port Scan Attacks In Real Time

15/01/2024 Comments off

Source: NixCraft

Q. How do I detect port scan attacks by analyzing Debian Linux firewall log files and block port scans in real time? How do I detect suspicious network traffic under Linux?

A. A port scanner (such as nmap) is a piece of software designed to search a network host for open ports. Cracker can use nmap to scan your network before starting attack. You can always see scan patterns by visiting /var/log/messages. But, I recommend the automated tool called psad – the port scan attack detector under Linux which is a collection of lightweight system daemons that run on Linux machines and analyze iptables log messages to detect port scans and other suspicious traffic.

psad makes use of Netfilter log messages to detect, alert, and (optionally) block port scans and other suspect traffic. For tcp scans psad analyzes tcp flags to determine the scan type (syn, fin, xmas, etc.) and corresponding command line options that could be supplied to nmap to generate such a scan. In addition, psad makes use of many tcp, udp, and icmp signatures contained within the Snort intrusion detection system.

Install psad under Debian / Ubuntu Linux

Type the following command to install psad, enter:
$ sudo apt-get update
$ sudo apt-get install psad

Lire la suite…

Categories: Logiciel, Réseau, Sécurité Tags: , , ,

MySQL – éviter les doublons dans un SELECT

15/01/2024 Comments off

Il suffit d’utiliser la clause DISTINCT entre SELECT et les champs.

Exemple :

SELECT DISTINCT id,nom,prenom FROM matable
Categories: Bases de données, Logiciel Tags: ,

Virtual host on ubuntu 13.10 and apache 2.4.6

14/01/2024 Comments off

I have the fallowing problem
My hosts file is as follows:

127.0.0.1       localhost
127.0.1.1       barbala4o-HP-ProBook-4530s
127.0.1.1       mysite.localhost

My file in the /etc/apache2/sites-available/mysite.localhost.conf is as follows :

<VirtualHost *:80>
        ServerAdmin webmaster@localhost
        ServerName mysite.localhost

        DocumentRoot /var/www/mysite

        <Directory /var/www/mysite/>
                Options Indexes FollowSymLinks
                AllowOverride All
                Require all granted
        </Directory>
        ErrorLog /var/log/apache2/mysite-error.log
        CustomLog /var/log/apache2/mysite-access.log common
</VirtualHost>

Lire la suite…

Categories: Logiciel, Système Tags: , ,