PUBLIC MARKS from camel with tag server

smtp-delay is an add-on/plug-in intended for use with qmail. It was written primarily to add banner delays and antipipelining to qmail. These two features are known to be able to block certain types of spam and virus mail sent through non-rfc-compliant SMTP engines. When I looked around for programs to add this functionality to qmail, I found only one such program, and didn't like the way it was done. BTW...I have the same objections to the way its done in sendmail 8.13.x. Since banner delays (the server pausing for some time before issuing an SMTP banner) cause every SMTP connection to take longer, I thought it would be a good idea to somehow exempt "legitimate" mail servers...or at least not subject them to long banner delays. So I decided to tune the banner delay time based on the connecting IP's reverse DNS. IPs with no rDNS get treated the worst (longest banner delay). IPs with rDNS matching a regex intended to detect dynamic/end-user IPs get a moderate delay. All other IPs get a very short banner delay...just long enough to see if they immediately pipeline (send SMTP commands before the banner's been sent). The original intent for smtp-delay was that it should be run before rblsmtpd, and simply set the RBLSMTPD environment variable if applicable, letting rblsmtpd issue the 4xx response. Pretty early on, I realized smtp-delay should be able to run standalone (without dependence on rblsmtpd to do its talking) and issue a 4xx response on its own. Lately, the spam load against our mail cluster has gotten so bad that I've started running smtp-delay after rblsmtpd, based on the idea that there's no point waiting out a long banner delay holding an open socket to an IP we have no intention of accepting mail from anyway. This reduced our concurrency by about 20%.

A good way to see how your Web applications and server will behave under high load is by testing them with a simulated load. We tested several free software tools that do such testing to see which work best for what kinds of sites. If you leave out the load-testing packages that are no longer maintained, non-free, or fail the installation process in some obscure way, you are left with five candidates: curl-loader, httperf, Siege, Tsung, and Apache JMeter.

This article explains how you can install and configure apache2-mpm-peruser on a Debian Etch server. apache2-mpm-peruser is an MPM (Multi-Processing Module) for the Apache 2 web server, very similar to apache2-mpm-itk, but faster (almost as fast as apache2-mpm-prefork). mpm-peruser allows you to run each of your vhosts under a separate UID and GID - in short, the scripts and configuration files for one vhost no longer have to be readable for all the other vhosts. It is based on metuxmpm, a working implementation of the perchild MPM. The result is a sane and secure web server environment for your users, without kludges like PHP's safe_mode.

I wrote the program "throttle.c," which you can insert into the tcpserver chain of commands for a qmail smtpd server. It takes one argument: the number of kilobytes per second to let through on the incoming file descriptor. Throttle does not throttle the outgoing file descriptor, because that's usually just status from your mail server. Additionally, throttle will set an alarm, so that any session longer than 15 minutes will expire and disconnect. This affords some amount of protection against lingering sessions that eat up your parallelism limit; I've seen such sessions from presumably trojaned DSL machines connecting to the mail server to send spam.

XBMC [1] signifiait anciennement XBox Media Center mais depuis la sortie de ‘Atlantis’ [2], nom de code donné à sa dernière mouture actuellement en Beta, cela n'est plus vrai. En effet, XBMC devient multi-plateforme et son acronyme devient récursif (XBMC Media Center). XBMC est pour ceux qui ne l'aurait pas encore remarqué un centre multimédia initialement conçu pour ne fonctionner que sur la console de jeux de Microsoft : la Xbox de première génération. Cependant, les utilisateurs souhaitaient pouvoir utiliser leur fabuleux centre multimédia sur d'autres plateformes et donc un gros travail de portage a été lancé. Ce travail abouti maintenant avec une première version Beta disponible d'hors et déjà sur les différentes plateformes concernées [3]. Vous trouverez donc une version "live" à mettre sur CD-ROM ou clé USB, une version Window XP/Vista, une version MacOS X et bien sûre une version pour GNU/Linux. XBMC est toujours disponible pour sa plateforme de prédilection et ne compte pas l'abandonner mais pour des raisons de légalité, il est impossible de fournir le binaire créé à l'aide du kit de développement de la Xbox délivré par Microsoft. Il faut alors acquérir ce kit (de manière plus ou moins légale) et compiler soit même le binaire pour la version Xbox. Au niveau des fonctionnalités, on peut déjà dire que XBMC se base sur de nombreux projets libres pour accomplir ses tâches. Par exemple, MPlayer pour la lecture de nombreux formats audios et vidéos, FFmpeg pour la lecture des DVD, Filezilla pour l'accès FTP, Samba pour le partage de fichiers, etc... Un listing complet des fonctionnalités est disponible en [4]. Vous n'avez donc plus aucune raison pour tester et profiter de ce fabuleux logiciels ;) [1] http://xbmc.org/ [2] http://xbmc.org/blog/2008/09/18/xbmc-atlantis-beta-1-release(...) [3] http://xbmc.org/download/ [4] http://xbmc.org/about/features/

OpenNebula transforms a physical cluster into a flexible virtual infrastructure which dynamically adapts to the changing demands of a service workload. OpenNebula leverages existing virtualization platforms to create a new virtualization layer between the service and the physical infrastructure. This new layer supports the execution of the services on a physical cluster, extending the benefits of VMMs (Virtual Machine Monitors) from a single physical resource to a cluster of resources. OpenNebula effectively decouples a server (deployed as a pre-configured VM) not only from the physical infrastructure but also from its physical location.

This tutorial provides step-by-step instructions on how to install Xen on an Ubuntu Hardy Heron (Ubuntu 8.04) server system (i386). You can find all the software used here in the Ubuntu repositories, so no external files (apart from a fixed Ubuntu Xen kernel to enable networking for the virtual machines) or compilation are needed.

1.4.11 got a new module for streaming Flash movie files called mod_flv_streaming. This module allows you to seek in FLV files using the high performance infrastructure of lighttpd. The idea is simple and explained and implemented on ‘Streaming’ flv video via PHP, take two at http://www.flashcomguru.com/ But instead of streaming the file through PHP we do it in the webserver. The module expects a request for the URL which matches flv-streaming.extensions and can handle a ’?start=’ as part of the request. The information to pass into the ‘start’ parameter is extractly by the flash-player from the meta-data of the flv-files. The meta-data can be setup with flvtool2 Now I leave it to you to combine this with mod_secdownload to create a flv-streaming server for free with deep/hot linking protected movies. server.modules = ( ..., "mod_secdownload", ## optional "mod_flv_streaming", ... ) flv-streaming.extensions = ( ".flv" ) Take the flash-player from flashcomguru and adjust the URL in the player and try yourself.

This tutorial shows how to set up a two-node Apache web server cluster that provides high-availability. In front of the Apache cluster we create a load balancer that splits up incoming requests between the two Apache nodes. Because we do not want the load balancer to become another "Single Point Of Failure", we must provide high-availability for the load balancer, too. Therefore our load balancer will in fact consist out of two load balancer nodes that monitor each other using heartbeat, and if one load balancer fails, the other takes over silently.

* What is SiteBar? * Screenshot Tour * Getting Started * Services and Prices * Get Involved! * Server Software * Contact Us TeamForge.net Ads by TLA * bookmark manager * $100 in FREE Links * Home * » * What is SiteBar? What is SiteBar? Why SiteBar? SiteBar is a solution for people who use multiple browsers or computers and want to have their bookmarks available from anywhere without need to synchronize them or take them along. The bookmarks are stored on a server - this could be: * a SiteBar server run by its authors (you don't need to install SiteBar software - just sign up our service); * another public server running our SiteBar software; * your own server running our free SiteBar software. Integration with Many Browsers The bookmarks are displayable/modifiable in almost any standards compliant browser. SiteBar is a ready to use Internet Explorer Favorites Manager, Firefox Bookmark Manager, Mozilla Bookmark Manager, Opera Bookmark Manager and more ... Bookmark Import and Bookmark Export for Mozilla Firefox, Microsoft Internet Explorer, Mozilla/Netscape, Opera, XBEL, RSS, Atom, OPML, RDF, ...

First and foremost, be prepared to have some patience when trying to get a USB cam to work under Linux. In trying to get mine to work, I searched many a newsgroup thread only to find there was only one message in the thread, the original question stating the problem. i.e. no one had an answer for the person who posted the question so you may be on your own trying to get your cam to work. Often times the same camera model will use different drivers for different sub-models (ex: not all QuickCam Express sub-models use the same driver). However, my trials and tribulations were a good learning experience and I'll share what I learned here to hopefully make your setup easier.

OpenNEbula (former GridHypervisor) is a virtual infrastructure engine that enables the dynamic deployment and re-allocation of virtual machines on a pool of physical resources. ONE (OpenNEbula) extends the benefits of virtualization platforms from a single physical resource to a pool of resources, decoupling the server not only from the physical infrastructure but also from the physical location.

Mobile data synchronization is becoming increasingly important for many people, and various standards have arisen to perform this two-way copying 'over-the-air'. The most important platforms that can do wireless synchronisation are ActiveSync that is used to communicate with Exchange Server and Research-in-Motion's BlackBerry Enterprise Server (BES). Both solutions require proprietary server-side software from the vendor, therefore limiting the use of PIMs (personal information managers) to either wired synchronization or irritating 3rd-party synchronizers requiring the installation of client software on the PDA.

The goal for this project is to provide translators to allow for interoperability between applications based on ODF (OpenDocument) 1.0 standards and Microsoft OpenXML based Office applications. As a part of this interoperability initiative, add-ins are being developed that can be installed on top of Microsoft Office Word (document processing), Excel (spreadsheet) and PowerPoint (presentation) applications (Office 2007 / 2003 / XP version) to allow for opening and saving OpenDocument format / ODF files (.odt, .ods and .odp) that adheres to ODF 1.0 specifications. We also provide command line translator utilities that allow doing batch conversions. The converter is based on XSL transformations between two XML formats, along with some pre- and post-processing to manage the packaging (zip / unzip), schema incompatibility processings and the integration into Microsoft Office applications like Word, Excel and PowerPoint. We chose to use an Open Source development model that allows developers from all around the world to participate & contribute to the project. Along with the Add-ins for Microsoft Word (v1.0 released), Excel (under development) and PowerPoint (under development), we also provide a command line translator that allows doing batch conversions. These translators can also be run on the server side for certain scenarios.

Scalr is a fully redundant, self-curing and self-scaling hosting environment utilizing Amazon's EC2. It allows you to create server farms through a web-based interface using prebuilt AMI's for load balancers (pound or nginx), app servers (apache, others), databases (mysql master-slave, others), and a generic AMI to build on top of. The health of the farm is continuously monitored and maintained. When the Load Average on a type of node goes above a configurable threshold a new node is inserted into the farm to spread the load and the cluster is reconfigured. When a node crashes a new machine of that type is inserted into the farm to replace it. 4 AMI's are provided for load balancers, mysql databases, application servers, and a generic base image to customize. Scalr allows you to further customize each image, bundle the image and use that for future nodes that are inserted into the farm. You can make changes to one machine and use that for a specific type of node. New machines of this type will be brought online to meet current levels and the old machines are terminated one by one. The project is still very young, but we're hoping that by open sourcing it the AWS development community can turn this into a robust hosting platform and give users an alternative to the current fee based services available.

Typical Scenario: You have a web server that serves your domain. You write a simple script to restart apache each night and pipe the logs off to your analyzer. It works. ISP/Hosting Scenario: Each server hosts many domains. You may also have load balanced servers (multiple machines) serving each domain. A tool like this is necessary to: 1. collect all the log files from each server 2. split the logs based on the virtual host(s) 3. discard invalid entries (phishing, referrer spam, etc) 4. sort them into chronological order 5. feed logs into analyzer 6. do something with the raw logs (compress, save to vhost dir, etc) [edit]

Openfiler is a powerful, intuitive browser-based network storage software distribution. Openfiler ScreenshotsOpenfiler delivers file-based Network Attached Storage and block-based Storage Area Networking in a single framework. Openfiler is built on the rPath Linux metadistribution and is distributed as a stand-alone Linux distribution. The entire software stack interfaces with third-party software that is all open source. File-based networking protocols supported by Openfiler include: NFS, SMB/CIFS, HTTP/WebDAV and FTP. Network directories supported by Openfiler include NIS, LDAP (with support for SMB/CIFS encrypted passwords), Active Directory (in native and mixed modes) and Hesiod. Authentication protocols include Kerberos 5. Openfiler includes support for volume-based partitioning, iSCSI (target and initiator), scheduled snapshots, resource quota, and a single unified interface for share management which makes allocating shares for various network file-system protocols a breeze.

how to set up a two-node Apache web server cluster that provides high-availability. In front of the Apache cluster we create a load balancer that splits up incoming requests between the two Apache nodes. Because we do not want the load balancer to become another "Single Point Of Failure", we must provide high-availability for the load balancer, too. Therefore our load balancer will in fact consist out of two load balancer nodes that monitor each other using heartbeat, and if one load balancer fails, the other takes over silently.

Qmail-Scanner is an add-on that enables a Qmail email server to scan gatewayed email for certain characteristics (i.e. a content scanner). It is typically used for its anti-virus and anti-spam protection functions, in which case it is used in conjunction with external scanners. It also enables a site (at a server/site level) to create "Policy blocks": i.e. react to email that contains specific strings in particular headers, or particular attachment filenames or types (e.g. *.VBS attachments).