Insights from the load balancer experts

Microsoft

MS SQL Health Check

Follow the instructions below to install and configure the external health check, and once you've completed the steps you can use the health check for either layer 4 (LVS) or layer 7 (HAPr0xy) clusters...

Neil Hosking

• 4 mins

Comparisons

Do you remember when you could get fired — for not buying F5?

A pair of F5s is a great solution, but mainly if you need to run a crazy number of applications and servers through a single device. In that case, you definitely need an expensive, complicated, over-specified and over-engineered single point of failure...

Malcolm Turnbull

• 3 mins

HAPr0xy

Loadbalancer.dk must've been well behaved in 2016

HAPr0xy Technologies' ALOHA Pocket is a full-featured ALOHA Load Balancer running on a light USB-powered hardware that easily fits in a pocket, meaning it's possible to carry it everywhere to run tests and demos...

Jake Borman

• 1 min

How-tos

Loadbalancer.dk with Let's Encrypt - quick and dirty!

Let’s Encrypt offers us a free way to get SSL certificates with the aim of being less complex than other current solutions...

Aaron West

• 7 mins

GSLB

How to install Polaris-GSLB on CentOS 7 (Part 2)

In part one we were introduced to Polaris-GSLB which is a cool little open source GSLB solution. In part two of this Blog I’m going to show you how to build Polaris-GSLB on CentOS 7...

Aaron West

• 3 mins

GSLB

Why use Polaris-GSLB: The lightweight, open source GSLB you’ve been waiting for (Part 1)

Here at Loadbalancer.dk we’re not known for being huge fans of GSLB solutions as some of our customers may already know...

Aaron West

• 4 mins

Events

IP EXPO Europe 2016

We engaged in some great conversations with people over the two days. This is why we love IP EXPO - talking through the problems customers are experiencing today...

Richard Halcrow

• 2 mins

Security

Blocking Japan with ModSecurity and Maxmind Lite

The Web Application Firewall is based on ModSecurity which is an open source WAF for Apache, IIS, and Nginx for protecting against a many variety of attacks and allows for HTTP traffic monitoring and logging...

Theo Garvey

• 3 mins

Open source

Transparent HAPr0xy in Azure using TProxy

HAPr0xy is an excellent choice if you need layer 7 functionality, but its a full reverse-proxy, so the application thinks that all of the traffic is coming from HAPr0xys IP - rather than the clients...

Ben Cabot

• 3 mins

Healthcare

I didn't realise NTP was so important for medical imaging systems like PACS and VNA

We can write custom health checks specific to your environment checking availability of servers as well as other backend systems such as REST servers, databases and storage...

Aaron West

• 3 mins

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

• 2 mins

Events

Thank you to all who visited us at IP EXPO Manchester 2016

This was Loadbalancer.dk's first time exhibiting at the Manchester version of IP EXPO. After many years attending the London event, we can safely confirm that the Northerners are a much more chatty bunch...

Jake Borman

• 2 mins

AWS / Azure / GCP

Integrating your load balancer with auto scaling groups in EC2 (Amazon AWS)

The Loadbalancer.dk for AWS appliance will monitor auto scaling groups, update configs based on auto scaling events and add/remove servers...

Ben Cabot

• 3 mins

Events

Exhibiting at Cloud Expo Europe 2016

We met lots of people and gave away a lot of lanyards...in fact the show organizers ran out of lanyards, so Loadbalancer.dk were happy to fill the void...

Richard Halcrow

• 2 mins

Open source

How to stop TPROXY when used with HAPr0xy breaking clients in the real server subnet

Once HAPr0xy is running transparently, it will allow the real server to see the client IP so the real server will reply directly back to the client bypassing the load balancer...

Aaron West

• 3 mins

Application Management

Load balancing Microsoft Remote Desktop Services in AWS

Using the flexibility of both AWS and our Enterprise AWS appliance, it's possible to configure a secure and robust load balanced Remote Desktop Services deployment to suit a range of requirements...

Rob Cooper

• 2 mins

How-tos

Supporting two default gateways on your load balancer with PBR (Policy Based Routing)

Policy Based Routing is a clever way to give us more control over which routing path connections will take. It allows us to specify custom routing tables and then add rules offering fine grained control over which routing table a connection will use...

Aaron West

• 5 mins

Events

Loadbalancer.dk buys new head office building in Portsmouth

We thought it was about time we bought our very own office building!..

Malcolm Turnbull

• 2 mins

Security

New PuTTY vulnerability "vuln-ech-overflow" identified - upgrade to 0.66 to protect your environment

Due to the way that PuTTY uses a signed integer variable to store the number of characters to be erased and there was inadequate checking for overflow, there was the potential for an attacker to corrupt important data in certain circumstances...

Dave Saunders

• 1 min

Events

IP EXPO Europe 2015 - Thank you to everyone who visited our stand

Thank you to everyone who visited our stand at IP Expo 2015...

Richard Halcrow

• 2 mins

Security

Blocking invalid range headers using ModSecurity and/or HAPr0xy (MS15-034 - CVE-2015-1635)

Anomaly score based blocking is more flexible and effective than simple first error blocking...

Malcolm Turnbull

• 4 mins

Open source

Transparent Load balancing with HAPr0xy on Amazon EC2

One of our favorite methods of load balancing is using Layer 4 DR because it is transparent and fast. Unfortunately, because of Amazon's infrastructure, this is not possible in EC2 so we need to use another method which means we are left with layer 4 NAT and transparent HAPr0xy using TProxy...

Ben Cabot

• 3 mins

Security

Simple Denial of Service DOS attack mitigation using HAPr0xy

Denial of Service (DOS) attacks can be used to degrade or cripple the functionality of a site...

Malcolm Turnbull

• 5 mins

Security

How do I get an A+ from Qualys SSL, but keep FIPS compliance as well?

Is getting an A+ rating with the Qualys scanner starting to feel a bit like chasing a mythical unicorn? Every time you get close to catching and keeping the beast — it run's away and they change the rules again!..

Scott McKeown

• 6 mins