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Set virtual private networks LAN for qemu kvm suited for use with iptables dhcpd etc. Similar to vmware vmnets Imprimer

This script allow you to create virtual private networks for qemu, similarly to what is done in vmware. You can see the output of ifconfig below the script.

Mis à jour / Last updated ( lundi, 27 mai 2013 14:54 )
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Linux KDE skanlite has trouble changing paper size. Cropping a PDF file from legal size to letter size with pdfcrop. Imprimer

As noted on this forum, it seems rather hard to change the paper format when scanning with KDE skanlite. Here is the work around I have come up with:

Mis à jour / Last updated ( samedi, 18 mai 2013 04:27 )
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Asterisk FreePBX Security: FreePBX Backdoor Passwords Pose Asterisk Security Threat; Here is more robust solution to eliminate this possibility Imprimer
Écrit par Alain Côté   
dimanche, 01 mai 2011 16:44

We received an email from one of our provider pointing to a Nerd Vittles article warning about hidden admin passwords by which hackers could gain admin access to FreePBX/Asterisk installations granted such installations can be accessed through the Internet. You should always protect your FreePBX installation by forcing users that need to access it through the Internet to use a a VPN or SSH port redirection. This might be inconvenient for some customers so keep on reading...

 

Mis à jour / Last updated ( samedi, 07 mai 2011 18:09 )
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Asterisk: optimizing a2billing mysql database with more than 1,000,000 rates in cc_ratecard Imprimer
Écrit par Alain Côté   
lundi, 05 octobre 2009 09:10

UPDATE: Areski Belaid, from a2billing, has just let us know that the index we are talking about will be added to the next a2billing release. We have been told that the index is already part of the source repository now as of rev 2419.

Like many other people, we have experienced performance problems with a2billing ( asterisk2billing ) when our cc_ratecard table reached 1,000,000 rows.

We have surfed around the internet to find solutions to fix this problem. We found several solutions, some suggesting to split the cc_ratecard table into multiple tables in order to fix things. Nevertehless, we figured that there must be another way and there was indeed another way. Click below to read more...

Mis à jour / Last updated ( mardi, 06 octobre 2009 16:03 )
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NVFax compiling problems with Asterisk 1.4.23.1 Imprimer
Écrit par Alain Côté   
lundi, 02 mars 2009 21:03

Changes to mutex usage in Asterisk 1.4.23 cause NVFax to cease to compile properly, see link below for updated files that compile with 1.4.23.1

Receiving and sending faxes with asterisk 1.4, NVFaxDetect, iaxmodem and hylafax.

 

Mis à jour / Last updated ( lundi, 02 mars 2009 21:18 )
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Les 10 erreurs les plus courantes de design Web / The 10 most common design mistakes on the Web Imprimer
Écrit par Michelle Blanc   
dimanche, 25 mai 2008 00:32

François Aubin est l’un de mes bons amis et clients. Il n’aime vraiment pas le design de mon blogue et me le dis presque à chaque fois que nous discutons (et il a raison et je suis en train de remédier à ce problème). François est aussi l’un des plus réputés ergonomes canadiens et il a récemment mis en ligne le billet The 10 most common design mistakes on the Web (qu’il me dit avoir écrit entre autres en pensant à moi).

Voir l'article de Michelle Blanc ici.

Mis à jour / Last updated ( dimanche, 25 mai 2008 00:57 )
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Hacker Redirects Barack Obama's Site Imprimer
Écrit par DarkAges   
jeudi, 24 avril 2008 02:39

According to Paul Mutton of Netcraft.com, "A security weakness in Barack Obama's website has been exploited to redirect visitors to Hillary Clinton's website. Visitors who viewed the Community Blogs section of the site were instead presented with Clinton's website as a result of a cross-site scripting vulnerability." The article closes with "While Mox states that the original issue has now been fixed, a number of similar vulnerabilities have since been identified and remain unfixed, and are documented on xssed.com, which notes that such vulnerabilities open up opportunities to infect Obama's supporters and site visitors with malware, adware and spyware."

Mis à jour / Last updated ( mercredi, 31 décembre 1969 15:00 )
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Asterisk chroot - Asterisk server running in a chroot jail; not as secure as virtualization but here it is. (Asterisk 1.4.18 and Linux 2.6.24) Imprimer
Écrit par Alain Côté   
samedi, 29 mars 2008 01:42

I finally gave up, I admit it, it was silly to try to run Asterisk reliably in a VmWare virtual machine, just as my co-workers kept on telling me. I was going to force us to get into Xen and other popular virtualization techniques just to prove that Asterisk should run perfectly in a virtual machines. I still believe that it should, but I completely give up on trying to demonstrate it ;-)

Mis à jour / Last updated ( dimanche, 06 avril 2008 10:52 )
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Application Monitoring Made Easy with Nagios Imprimer
Écrit par Jar Lyons   
mercredi, 26 mars 2008 05:15
This article is intended to describe a method for generating a maintenance free system level view of the status of your backroom applications without the need to refactor any of your code. The monitoring platform is Nagios (www.nagios.org), a popular open source tool that has has been around for years and enjoys a large community.
Mis à jour / Last updated ( mercredi, 26 mars 2008 23:28 )
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Linux local root exploits for kernel 2.6.17 to 2.6.24.1 Imprimer
Écrit par Alain Côté   
mardi, 12 février 2008 20:13

There is a security hole in Linux kernels 2.6.17 to 2.6.24.1, several exploits have already been written :

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0010
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0163
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0600

Solution

Upgrade to kernel 2.6.24.2 or visit your distribution web site and download a patch for your kernel version.

 

Mis à jour / Last updated ( mercredi, 13 février 2008 02:40 )
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