Balancer

Backup servers in the Snapt Aria Load Balancer *In any high availability environment, you’ll always encounter backup servers that will take over traffic/services when the primary servers die or fail. And this is exactly why we’ve added function...

The SSL Accelerator has SSLv3 blocked by force - it cannot be used on it. The virtual Load Balancer allows SSLv3, but it can be disabled on a per-group basis. To make sure it is disabled head to Balancer -> Group Management Now click '...

When dealing with web applications running over HTTP/S, we will come across a series of problems that we can roughly separate into two groups: client errors  (4xx status codes) server errors  (5xx status codes) Yes,  404 Not Found  may b...

You may wish to enable logging on Snapt Aria so that you can view historical reports on ups/downs, connections, etc. To enable logging head to  Balancer -> Configuration -> Logging Options   Under the Logging Options page simply click on ...

XmlRpc API The Snapt Aria API plugin provides a free and complete XmlRpc API to Snapt Aria. PHP Example Pack A full set of working examples in PHP which can be run from the command line, including cache purging, load balancer control, and ...

Server Name Indication (SNI) is a TLS extension that allows a server to serve multiple certificates at the same IP/port endpoint. The TLS server, or load balancer in this case, with SNI support, is usually configured with multiple certificates. The ...

503 Service Unavailable  is an HTTP gateway error occurring when the server is unavailable, either because it is overloaded or down for maintenance. It is mostly a temporary condition. From  RFC 2616  by the World Wide Web Consortium (W3C): T...

Snapt Aria load balancer performs well under any hypervisor, however, certain providers have much higher performance than others. Below is an estimation guide for your use. The hardware used for this test closely matches a dual-core Intel CPU with 2...

When adjusting the timeout of connections in the virtual Load Balancer you must go to Balancer -> Configuration -> Default Settings. In the Default Settings, you will need to change the client and server timeouts to the desired amount of time. ...

The Snapt Aria software Load Balancer uses a PEM file format for SSL certificates. This file is a combination of a private key (.key), the certificate (.crt) and any intermediary certificates that you need (.crt). Typically it looks like this: ...

With Snapt Aria, you can easily set up health checks to ensure that your backend services are up and running before marking a load-balanced pool as online. But how do you check to see if a specific host (website) is online? The HTTP Check URL is...

In addition to  SSL Offloading , the Load Balancer offers SSL re-encryption. Re-encryption allows you to decrypt, make  Layer 7  (application level) alterations or decisions such as applying ACL’s (X-Forward-For headers, etc), and then encrypt aga...

You can download the datasheet for the Snapt Aria virtual layer 7 Load Balancer below. Download the attached PDF.

Snapt Aria provides an automatic wizard for configuration load balancers for Microsoft Exchange. To use the wizard navigate to the Balancer -> Create a load balancer  menu item and then choose Exchange. Creating Your Group Once you sele...

This guide will explain how to use the Snapt Aria Load Balancer to send different hostnames (host headers) to different backends (servers). This is done using the ACL system in Snapt Aria, a frontend and at least two backends. It's commonly called...

If you have disabled SSLv3 (for reasons such as POODLE, for example) you may find that your servers are suddenly marked as offline. This is because you have the SSL Check enabled under Protocol Tests in your Group or Backend. This uses SSLv3 to chec...

We take a look at how Snapt Aria virtual Load Balancer does session affinity and some of your options. We further explain sticky session methods in detail. The difference between the two methods, Source Hashing, and Cookie Insertions. What the pro...

We go a bit more in-depth into the setup and configuration of the Snapt Aria virtual load balancer. We guide you through a basic install and how to apply more advanced settings. We also show you how to how to edit some of the load balancer setting...

We look at installing Snapt Aria Virtual Load Balancer on an existing HAproxy installation. We can integrate onto an existing HAproxy config seamlessly. Having the Snapt Aria Load Balancer on top of HAproxy allows you to have interactive up to dat...

In this video, we will be going through the more advanced settings the Snapt Aria virtual Load Balancer offers. We will be discussing: Setting up the Connection limit zone, you can specify size, type, IP or Server-based Request Limit zones ...

When you need to perform important or emergency maintenance on one of your servers but don’t want to disrupt existing connections on that server, you might need to look at draining the server. Step 1: Navigate to the Group or Backend in where ...

By default, the load balanced web servers will not see the Clients IP as the actual Source IP from which the request originates, instead – the load balancers IP Address is used. As an administrator you might need to identify the client's IP for on...

Add new Lua script Snapt Aria Load Balancer has the ability to create Lua scripts and add them to the Balancer groups. Lua is a powerful, fast, lightweight, embeddable scripting language. That will allow you to accept and deny access. We believe...

There are certain circumstances under which your network may experience an extremely high load, even with the load balancer and web accelerator, such as: your site gets promoted to the top of the  search engine results page  (SERP), your site ...

Snapt Aria provides full support for RDP load balancing . There is a wizard which we strongly advise using that will create the initial group for you. Timeouts You need very high timeouts when load balancing RDP. The wizard sets the client ...

Certain clients with specific configurations and versions have had an issue where duplicate Load Balancer/HAProxy processes are causing a split-brain type of operation after reloads. Historically the fix has been stopping and starting the load balan...

Snapt Aria has two separate pricing types Standard and Enterprise billing.The prices range from $450 a year upwards depending on features and support.We do have monthly pricing options for these licenses which start from $55.The Load Balancer itself...

Snapt Aria ships a complete Layer 7 virtual load balancer for HTTP/S and TCP traffic, to ensure your critical services are always kept online. In this guide, we’ll see how to create a load balancer, and how to install additional plugins to extend ...

What is load balancing? Load balancing is used to improve the performance and reliability of websites, applications, databases, and other services by distributing the workload of the servers. A single point of failure can be mitigated by introdu...

Layer 4 Method Step 1.  Follow the steps below to set up your required ACL Head to Balancer -> ACL Management Then under ACL Management click Add ACL When adding an ACL fill in your desired name and click Continue ...

A quick overview of the Snapt Aria Layer 7 Load balancer. This takes your web traffic and splits it between multiple servers, including HTTP, HTTPS, SSL Proxy, Microsoft Exchange, and Remote Desktop Servers. This provides increased performance, reli...

The Snapt Aria Load Balancer is able to compress certain request/content, not only does this save on bandwidth cost, but also improves your customer's experience on your website as this help to make pages load faster. But there are certain circums...

If you are not seeing reports or live dashboard information and your Status Check shows an error for Stats Socket it means that we cannot read from the socket for the load balancer. The first thing to do is go to  Balancer -> Configuration -> Defa...

Snapt Aria images (depending on configuration) may have the sendmail daemon running on port 25 on localhost. This can cause issues when your load balancer group or Frontend is bound to 0.0.0.0:25 and there are two options Option 1: Specify the I...

SSL Server Verification is enabled by default. If you receive an error such as "Error: verify is enabled by default but no CA file specified" you can simply disable verification by navigating to- Balancer -> Configuration -> Default Settings ...

We provide a full manual for the Snapt Aria software Load Balancer. You can also request installation support via the Snapt Site .

Snapt Aria provides an automatic wizard for configuration load balancers for Microsoft Exchange 2016. To use the wizard navigate to the Balancer -> Create a load balancer menu item and then choose Exchange. Creating Your Group Once you select th...

What Is RDP Snapt Aria virtual Load Balancer comes with built-in features to load balance Microsoft Remote Desktop Services  (RDS), also known as  Terminal Services  in Windows Server 2008 and earlier. RDS allows a user to take control of a rem...

There are certain circumstances in which you might want to transparently pass traffic from one port to another. Quite typically for web apps, this may be the case if you are receiving plain text insecure requests on port 80 (HTTP) and you want those...

Snapt Aria provides SSL termination/offloading in both the SSL accelerator and load balancer modules. These are extremely resilient and secure by default, but there are several techniques that can be applied to provide additional security. Selec...

NTLM authentication is not HTTP protocol compliant but it is used by some older Outlook and Windows client applications. The Snapt Aria Load Balancer provides 2 options for supporting this use case: Add the following custom configuration to th...

Snapt Aria helps to facilitate load balancing at both layers 4 and 7. Any TCP service can be load balanced by Snapt Aria. We have advanced layer 7 awareness for HTTP, HTTPS traffic, and a number of other higher-level protocols such as SMTP, RDP an...

If you wish to use a file for a list of IP addresses on an ACL instead of specifying single addresses you can follow this guide: Create ACL in the Balancer drop-down menu -> ACL Management Add ACL 3.Specify a name and set the ...

Snapt Aria Insight is an optional setting that can be enabled under Balancer > Configuration > Snapt Settings . When enabled, it facilitates detailed logging of throughput, session rates, connection rates and total connections per IP address ...

If you know that your webservers are up, but the Snapt Aria Load Balancer is showing them as down it is most likely the HTTP health check. You can go to Groups or Backend Management and click edit on your Group/Backend. Then go to the Protoc...

Yes, but to make use of redundancy you will always need a second server which means that another license is necessary. We offer many packages but when purchasing an Essential or Growth license from us you can buy a second license (which will be fu...

A keep-alive (KA) is a message sent from one device to another to check that the link between the two is operating and to prevent the link from closing abruptly. In the context of the webserver, this is also called an HTTP persistent connection ,...

On the Live Dashboard for Snapt Aria virtual Load Balancer, you will see a Status column. For example, it may say "UP [L7OK] in 4ms". The brackets give you the current health status, and what it means. Below is a table of what the various valu...

You might have noticed a few references to HAProxy within the Snapt Aria UI that is because the Snapt Aria Load Balancer is powered by HAProxy, utilizing it to its maximum capability. We have developed quite a large number of features, added to an...

The Snapt Aria software Load Balancer is able to operate under a TPROXY setup for transparency. This is not advised though as it requires an advanced user and network changes. We suggest rather using a header like X-Forwarded-For and an aware applic...

From time to time you'll have most probably received an error 408 in Google Chrome. This error is absolutely normal behavior with Snapt Aria. Modern browsers now have some advanced features such as "TCP pre-connect" and this allows the browser to ...

We look at load balancing a set of Microsoft Exchange Servers, using the Snapt Aria virtual load balancer. The wizard enables you to add up to 5 exchange servers on initial setup but you can add as many as you want after you finish the wizard. This ...

A group is essentially a Frontend and Backed combined. We generally recommend using groups, however, depending on your requirements you may need to use a frontend/backend pair. Overview In a nutshell, Frontends  are in charge of acceptin...

Within Snapt Aria, there are two methods by which specific TLS versions should be enabled or disabled. The method that you'll use depends on your use case (Are you doing SSL Termination on the Web Accelerator or the Load Balancer?). Navigate t...

The main reason for using client-side certificates is to increase the level of authentication and security for your users. Snapt Aria virtual Load Balancer supports client certificate authentication. You will also be able to enable "mutual authent...