Somewhere down the line, Citrix Admins need to upgrade their Citrix Site from one version to another, Example, from XenDesktop 71.5 LTSR to CVAD 1912 LTSR. For Citrix site upgrade, we have to mount the product ISO in Citrix server and run the setup file. But What about VDIs?
Based on your company’s VDA usage, you may have hundreds to thousands of VDIs in your company. How do you upgrade VDA agent on all those VDIs?
Images by Susanne F, Clker-Free-Vector-Images from Pixabay, and my own customization.
I have used a few hosting websites like Hpage, wordpress.com, etc.. for a long time. But I wanted to host my website on something free and fast. I thought of using GitHub pages, but converting my WordPress site to Github pages was a very big task for me. I was looking for easy to use software to generate MD pages.
As part of day to day tasks, one of the major activity for citrix admins is to maintain free VDIs in xendesktop delivery groups. If we dont have registered free VDI machines, and when new users try to connect to VDI, they would get errors like “Cannot start VM”. So, we have to make sure we have enough free VDIs in delivery groups. As a part of this process, I wrote a powershell script that would auto provision new VDIs to a given catalog and add them to delivery group.
Title: Resolving Citrix License Server Authentication Error: “You did not authenticate correctly”
Encountering an authentication error message like “You did not authenticate correctly. Please try again or contact your system administrator” when accessing the Citrix license server can be a common issue. Fortunately, there is a simple solution to address this problem effectively.
To troubleshoot and resolve the authentication error, follow these steps:
Go to the directory on your Citrix license server:
Issue After successfully logging into the NetScaler Gateway portal, users were expecting to see the list of available applications. Instead, they were greeted with a 404 error message: “File or directory not found. The resource you are looking for might have been removed, had its name changed, or is temporarily unavailable.”
NetScaler Gateway 404 error Investigation Verified netscaler gateway authentication using /tmp/aaad.debug. No errors were displayed in the output. This tells us the authentication is correct.
Nstrace VS nstcpdump VS tcpdump In a Netscaler environment, there are three main tools used for capturing and analyzing network traffic: nstrace, nstcpdump, and tcpdump. Here is a comparison of these tools:
nstrace:
Functionality: Nstrace is a Netscaler-specific tool that allows you to capture and analyze network traffic, including HTTP, SSL, and other protocols, on a Netscaler appliance. Usage: Nstrace is commonly used for troubleshooting application delivery and networking issues within a Netscaler environment.
Issue: We have deployed the three certificates using FAS console and we were able to view and access them in certificate authority console. As per a misconfiguration, we have deleted those three certificates from certificate authority. When we tried to redeploy the certs in our certificate authority server, we ended up in below error:
System.Runtime.InteropServices.COMException (0x80072071): CertEnroll::CX509CertificateTemplateADWritable::Commit: An attempt was made to add an object to the directory with a name that is already in use.
Error: There is no Citrix XenApp Server configured on the specified address : [Socket error 10060]
Solution:
Mostly this is port problem. If you are connecting to storefront url directly without netscaler, from user’s device, open 2598 and 1494 ports to the VDA servers. Without this, you will see “Connection in progress…” bar but it wont move to “connection established Negotiating capabilities…” step.
After a min, it shows “There is no Citrix XenApp Server configured on the specified address : [Socket error 10060]” error.
In a Citrix NetScaler appliance, the Management CPU is responsible for handling management tasks such as configuration, monitoring, and reporting. On the other hand, the Packet Engine CPU is dedicated to processing network traffic, including tasks like load balancing, SSL offloading, and content switching.
The Management CPU is used for handling administrative tasks and does not directly impact the processing of network traffic. It is responsible for managing the configuration of the NetScaler appliance, monitoring its performance, and handling administrative tasks such as logging and reporting.
Issue:
When users click on the app, it loads the receiver, starts the dialog box which says loading profile, scripts, getting ready etc and the progress bar completes. Just before the application launch, it disappears. Session is created on the server but application wont launch on user’s device.
Error:
The Citrix Universal DLL injection driver has encountered an unexpected error.
Event id: 1005 on the app server(VDA server).
Solution:
Restarting the app server will temporarily fix the issue.
