Tag Archives: high-availability

Microsoft Remote Desktop Services (RDS) Load-Balancing

Microsoft Remote Desktop services (RDS) Remote Desktop Services, formerly Terminal Services, is a technology from Microsoft that allows users to access remotely to a session-based desktop, virtual machine-based desktop or applications hosted in a datacenter from their corporate network or … Continue reading

Posted in Aloha, architecture, HAPEE, HAProxy, Uncategorized | Tagged , , , , | Leave a comment

A HTTP monitor which matches multiple conditions in HAProxy

Load-Balancing and health checking Health checking is the method to check a service availability on a server. It is one of the most important feature of a load-balancer. How could we balance traffic amongst servers if we don’t know if … Continue reading

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binary health check with HAProxy 1.5: php-fpm/fastcgi probe example

Application layer health checking Health checking is the ability to probe a server to ensure the service is up and running. This is one of the root feature of any load-balancer. One can probe servers and services at different layer … Continue reading

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Emulating Active/passing application clustering with HAProxy

Synopsis HAProxy is a Load-Balancer, this is a fact. It is used to route traffic to servers to primarily ensure applications reliability. Most of the time, the sessions are locally stored in a server. Which means that if you want … Continue reading

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Microsoft Exchange 2013 architectures

Introduction to Microsoft Exchange 2013 There are 2 types of server in Exchange 2013:   * Mailbox server   * Client Access server Definitions from Microsoft Technet website:   * The Client Access server provides authentication, limited redirection, and proxy services, and offers … Continue reading

Posted in Aloha, architecture, exchange, Exchange 2013, layer4, layer7 | Tagged , , , , , , | 5 Comments

Microsoft Exchange 2013 load-balancing with HAProxy

Introduction to Microsoft Exchange server 2013 Note: I’ll introduce exchange from a Load-Balancing point of view. For a detailed information about exchange history and new features, please read the pages linked in the Related links at the bottom of this … Continue reading

Posted in exchange, Exchange 2013 | Tagged , , , , , | 7 Comments

high performance WAF platform with Naxsi and HAProxy

Synopsis I’ve already described WAF in a previous article, where I spoke about WAF scalability with apache and modsecurity. One of the main issue with Apache and modsecurity is the performance. To address this issue, an alternative exists: naxsi, a … Continue reading

Posted in Aloha, architecture, HAProxy, security | Tagged , , , , , , , , , , , , | 3 Comments