ISA Server 2006 preventing Citrix Applications to run

Posted on 2009-04-16
Last Modified: 2012-05-06
We are having problems launching a Citrix application which has been provided to us by an external company.

We have a .ica which makes a direct connection to a server.  However, the ISA server which acts as our Web Proxy is failing to forward the traffic and we are receiving Failed Connection Attempt - Status Code 59 - an unexpected network error occurred.  The logs are only reporting HTTP traffic.

However, I have tried opening ports 1484 and 2598 on the ISA Firewall and we already have a rule in place to allow HTTP and HTTPS traffic.

This connects fine using an ADSL connection away from the ISA server.

Has anyone else come across similar problems or even better a solution which will allow us to get the traffic through the ISA Firewall?
Question by:MarkBourn
    LVL 21

    Expert Comment

    Citrix uses TCP 1494, not 1484 (if this was not just a typo from you).

    Have you seen this:


    Author Comment

    Oops, I meant TCP 1494, that'll be my fat fingers no longer working correctly.

    That article, looks like it relates to an older version of ISA server (I have come across similar articles while browsing the web).  Also, the citrix server doesn't belong to us, so I cannot publish it.
    LVL 51

    Expert Comment

    by:Keith Alabaster
    open the isa gui - select monitoring - logging - start query - try the access - what shows up in the log?
    I assume you have the ISA2006 supportability pack and ISA2006 sp1 deployed?

    Accepted Solution

    We already had SP1 installed and I have now installed the supportability pack.  I have tried running the ica file again but still having that same problem.  

    I have attached the logs from the ISA server.


    Featured Post

    What Security Threats Are You Missing?

    Enhance your security with threat intelligence from the web. Get trending threat insights on hackers, exploits, and suspicious IP addresses delivered to your inbox with our free Cyber Daily.

    Join & Write a Comment

    #Citrix #Citrix Netscaler #HTTP Compression #Load Balance
    Citrix XenDesktop 7.6 Citrix Policies Graphics
    How to install and configure Citrix XenApp 6.5 - Part 1. In this video tutorial we have explained step by step installation of Citrix XenApp 6.5 Server on Windows Server 2008 R2 is explained in this video. We have explained the difference between…
    In this tutorial you'll learn about bandwidth monitoring with flows and packet sniffing with our network monitoring solution PRTG Network Monitor ( If you're interested in additional methods for monitoring bandwidt…

    733 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    23 Experts available now in Live!

    Get 1:1 Help Now