Latest
The Citrix NetScaler vulnerability crisis: When your load balancer becomes a liability
If you're running a customer-managed NetScaler load balancer or Gateway, stop reading this and verify your versions.
Insights from the load balancer experts
How-tos
What is Stunnel and how do you configure it?
Here is another example of a more “exotic” Stunnel configuration. Most people, and rightly so, will ask “but why?”. Well, because we can!..
Automation
Solving the Layer 4 ARP problem on Linux with Ansible
The ARP problem for Layer 4 DR (Direct Routing) mode is something that needs to be solved for each of your Real Servers in the virtual service...
GSLB
Choosing the best option to host across multiple locations or data centers
Organizations are moving away from the traditional data center model, and favoring a hybrid approach to hosting their systems and applications, that involves multiple sites, providers and even cloud environments...
GSLB
Why does Global Server Load Balancing (GSLB) suck?
Ok, before I start to fan the flames, let me start with the usual caveat; GSLB doesn't ALWAYS suck — just more often than you'd think, for these reasons.....
Performance
G-Zip Compression and Load Balancing
A couple of customers asked if our appliances would do G-Zip compression. In the past we hadn't given it much thought until someone offered us a card to test it!..
Performance
EC2 load balancer appliance rocks, and its FREE... for now anyway.
I’m excited and slightly scared by our latest product! Excited because I've become slightly addicted to launching multiple instances in different parts of the world and load balancing the traffic seamlessly. Scared because this could change our whole business model...
Layer 4
How to enable SNAT in LVS (xt_ipvs) and iptables
The vast majority of layer 4 load balancers use LVS in two-arm NAT mode...
HAProxy
Load balancing Microsoft Office Communications Server (OCS) with HAProxy
Here at Loadbalancer.org we have recently started the certification process of our product with Microsoft Office Communications Server (OCS)...
Open source
Load balancing Windows Terminal Server — HAProxy and RDP Cookies or Microsoft Connection Broker
When you have users depending on Windows Terminal Services for their main desktop, it's a good idea to have more than one Terminal Server. RDP, however, is not an easy protocol to load balance...
HAProxy
Transparent proxy of SSL traffic using Pound to HAProxy backend patch and how-to
I've previously blogged about how to get TPROXY and HAProxy working nicely together, but what if you want to terminate SSL traffic on the load balancer to use HAProxy to insert cookies in the standard HTTP stream to the backend servers?..
High Availability
Loadbalancer.org guarantee 99.999% (5 nines) uptime to all of our customers
Some vendors make a fair bit of hype about their products enabling 99.999% availability out of the box...
HAProxy
Configure HAProxy with TPROXY kernel for full transparent proxy
If you use HAProxy as the load balancer then all of the backend servers see the traffic coming from the IP address of the load balancer...
How-tos
LVS Local node patch for Linux 2.6.25, Centos 5 kernel build how-to
Standard Kernel builds of LVS (Linux Virtual Server) don't have the ability to load balance traffic that is from the local node...
Direct Server Return
Load balancing via Direct Routing has several key advantages over NAT based methods
One of the (many) traditional problems with load balancing is the requirement to change your infrastructure in order to implement a hardware load balancer...
Direct Server Return
Direct Routing aka. Direct Server Return — How to solve the ARP problem on Windows Server 2022
Direct Routing aka. Direct Server Return (DSR) aka. N-Path is a great load balancing method. And it is, without doubt, the fastest method possible...
Performance
Why Layer 7 load balancing sucks...
Hardware marketing execs get very excited about the fact that their product can magically scale your application by using ‘amazing Layer 7 technology’ in the load balancer such as cookie inserts and tracking/re-writing...