ARCHIVE - Can Voyant be run on Citrix? **Voyant Adviser, UK and Ireland**

Q - Is Voyant compatible with Citrix and do you have any other clients using your software within a Citrix environment?

A - Yes, and there are numerous firms that use Voyant on Citrix.

Citrix administrators only need to ensure that their Citrix environment meets the basic requirements our software needs to run – e.g. Java must be installed and allowed communicate through their network out to our servers without blocking the download of files or scrubbing header information.

Other than the usual issues that might occur on any server or network (e.g. firewalls or permissions blocking our software from being downloaded, installed, or communicating with our servers) there is usually nothing special about running Voyant on Citrix. The server just needs to meet our basic operational requirements, as outlined here. Read more >>

Also, below are links to an installation guide and a guide to our software's operational requirements, should you or your IT department need them.

Installation Guide

Basic Operational Requirements


Java and Voyant would need to be installed and available to each instance (virtual client) that log into on Citrix when accessing Voyant.


Required IP addresses

The IP addresses for are currently, at time of writing, and  

However, since Voyant uses Amazon Web Services (AWS), the IP addresses of the come from one of the blocks used by AWS and change frequently.  To whitelist the Voyant IP address, one needs to whitelist the IP addresses in the AWS allocated blocks. 
More information about AWS allocated blocks of IP addresses can be found here


Required content types

The content types used by Java Web Start and Voyant are






Required file types

Files with extension




The .jar and .pack.gz files contain binary data.


Header information

Some network firewalls alter or strip information from the headers of messages received through their networks. You will need to ensure that the headers in responses from our servers, which contain important version information, are not altered or stripped by any network proxy servers. The Java Web Start component of the JRE is looking for a specific header (x-java-jnlp-version-id) in the response from our web servers when it requests the application resources. On very rare occasions we have found that some firms operate through firewalls and/or proxy servers which remove these headers from the response.

If you would like to test this outside of the Java environment, the URL format for a versioned resource is as follows.


Below is the expected response as picked up by a network request monitoring tool (We used Fiddler with Firefox).


HTTP/1.1 200 OK

Date: Thu, 07 Jul 2011 12:44:56 GMT

x-java-jnlp-version-id: 3.2.65_sig2012

Last-Modified: Wed, 06 Jul 2011 22:08:32 GMT


Content-Type: application/java-archive;charset=UTF-8

Content-Length: 7489262

Set-Cookie: BALANCEID=balancer.app1; path=/;

Keep-Alive: timeout=15, max=100

Connection: Keep-Alive


Authorised computer limits on Citrix

The main issue that crops up when running Voyant on Citrix is our check for authorised computers – usually we allow 2 computers to be authorised per licensee. On Citrix a user may be assigned per session to one of a number of virtual clients, they may quickly run up against our authorised computer limit. What we normally do for Citrix users is ask the users to register, creating their user accounts on our website, and contact us once registered. We can then switch off the authorised computer check for those user accounts.

Additional information is available here. Read more >> 

Information on another Citrix related consideration can be found here. Read more >>