Category Archives: architecture

Client IP persistence OR source IP hash load-balancing?

Client or Source IP ??? Well, this is roughly the same! Depends on people, environment, products, etc… I may use both of them in this article, but be aware that both of them points to the IP that is being … Continue reading

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Microsoft Remote Desktop Services (RDS) Load-Balancing and protection

RDS, RDP, TSE, remoteapp Whatever you call it, it’s the remote desktop protocol from Microsoft, which has been renamed during the product life. Basically, it allows users to get connected on remote server and run an application or a full … Continue reading

Posted in Aloha, architecture, security, Virtual Desktop Infrastructure | Tagged , , , | 4 Comments

SSL offloading impact on web applications

SSL Offloading Nowadays, it is common (and convenient) to use the Load-Balancer SSL capabilities to cypher/uncypher traffic from clients to the web application platform. Performing SSL at the Load-Balancer Layer is called “SSL offloading“, because you offload this process from … Continue reading

Posted in Aloha, architecture, HAProxy, ssl | Tagged , , , | 4 Comments

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 , , , , , , | 3 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