Andrei Grigoras | Loadbalancer

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Andrei Grigoras is a recognized authority in high-availability and network engineering. His expertise is proven through hands-on implementation and documentation of load balancing solutions for critical enterprise applications (e.g. Microsoft Dynamics, VMware) using HAProxy. As a subject matter expert, he writes on complex topics like reverse proxy configuration, WAF security, and zero downtime. His experience ensures robust, scalable, and secure application delivery. He also loves trekking.

How to limit connections with HAProxy, iptables or nftables

How to limit connections with HAProxy, iptables or nftables

The app I was dealing with wouldn't allow me to rate limit the total number of connections going through it...

Andrei Grigoras

HAProxy reverse proxy: the what, when, and how

HAProxy reverse proxy: the what, when, and how

Perplexed by proxy?! Ruffled by reverse proxy?! We’ve all been there. Honestly, sometimes I think the language we use makes things sound way more complicated than they actually are...

Andrei Grigoras

DICOM viewers: Can you recommend a free one I can trust?

DICOM viewers: Can you recommend a free one I can trust?

After about an hour of searching I finally found two viewers that I can recommend...

Andrei Grigoras

How to load balance Microsoft Dynamics using HAProxy

How to load balance Microsoft Dynamics using HAProxy

Microsoft Dynamics is a critical ERP and CRM tool, used every day by businesses all over the world. The application therefore needs to be highly available and scalable...

Andrei Grigoras

How to install and configure HAProxy Layer 7 on Red Hat Linux

How to install and configure HAProxy Layer 7 on Red Hat Linux

Control how HAProxy will be started, stopped, restarted, reloaded, or monitored...

Andrei Grigoras

How to load balance VMware's AirWatch Mobile Access Gateway (MAG) and Secure Email Gateway (SEG) with HAProxy

How to load balance VMware's AirWatch Mobile Access Gateway (MAG) and Secure Email Gateway (SEG) with HAProxy

Want to configure a load balancer for VMware's AirWatch Mobile Access Gateway (MAG) and Secure Email Gateway (SEG)? Let's help you out...

Andrei Grigoras

Brute force login: Simple protection techniques with the ModSecurity WAF

Brute force login: Simple protection techniques with the ModSecurity WAF

The web-based login to your application is a juicy target for hackers. And once they get past the login, they can cause you some serious pain...

Andrei Grigoras

How to load balance Microsoft FTP Server with HAProxy

Application Management

How to load balance Microsoft FTP Server with HAProxy

Open standards are awesome, and the File Transfer Protocol FTP (inspite of its flaws) has been in constant use for an amazing 40 years! FTP can be a pain to run over firewalls and load balancers, so this blog explains how to configure Microsoft FTP and HAProxy...

Andrei Grigoras

Disaster recovery is more important than HTTPS SNI support...

High Availability

Disaster recovery is more important than HTTPS SNI support...

SNI is an extension to the TLS protocol which enables the client to broadcast its hostname when it tries to connect to your server. This allows you to use multiple SSL certificates on a single IP...

Andrei Grigoras

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