Citrix Netscaler delay in reboot and license errors

Issue: We had to reboot our ADC. We were not able to save the configuration both from GUI and command line in ADC. We did a force reboot. When powering on, we observed lot of license related errors like “The license info cannot be fetched” " No licenses were found" etc.. But after logging in, we were able to see the license file. After netscaler is powered on, we were not able to login through GUI and ssh.

Secure XML Traffic Between Storefront and Delivery Controller (DDC) IMP

If you’d like to secure xml traffic from storefront to DDC, you should install certificates on the DDC. If you have IIS installed in your DDC server, then mapping the certificate to 443 is very straight forward process. Open IIS manager (inetmgr), select your server and then select server certificates. Import the certificate along with private key and bind it to 443. If you do not have IIS installed in your DDC server, then you should install the certificate on the DDC server and run netsh commands to link that certificate to citrix DDC software.

Citrix Director shows "no data is available for the specified time period"

After you upgrade your citrix site, or on a new citrix site creation, when you open director portal, under sessions/logon performance tab for logon duration details it shows “no data is available for the specified time period”. Based on your CVAD version, copy the source files into a folder on your VDA (app servers). Goto iso\x64\Virtual Desktop components folder and right click on UpmVDAPlugin_x64.msi file and click repair. complete repair and reboot the server.

Citrix VDA install doesn't show GUI

On a new install of VDA software from CVAD 1912 LTSR CU5 version, when you run the VDA software from AutoSelect.exe file and enter all the details, GUI does not show up showing the installation steps. Behind the scenes, installation never happens. This is observed on different CVAD versions. This is because in the registry path, HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce there was a key created with the name “!XenDesktopSetup” When you install VDA for the first time, it shows the GUI and VDA installation steps.

NetScaler Gateway URL white page

Issue: After upgrade, when you open the netscaler gateway url, instead of showing the username and password page, it immediately shows a white page. Solution: This is mostly seen when upgrading from 10.5 to 11. From a working netscaler copy the folder, /netscaler/ns_gui/vpn and replace this folder on your current netscaler. Refresh the gateway vip url. It should work. You can also check the gateway url. If it is /vpn/index.html, check the index.

NetScaler ADC - Http/1.1 Internal Server Error 43531

Issue: After upgrading netscalers to 13.0 84 version from 12.1, on RfwebUI theme for Citrix gateway VIP URL, the URL opens as expected but when users login, it immediately throws an error on screen “Cannot complete your request” On default theme (black theme), after users enters their credentials and click signin, it says Http/1.1 Internal Server Error 43531 Solution1: While using classic policies on 12.1 ADC version, session policy is configured as REQ.

Citrix Netscaler - Space Issue on /var and /flash partitions

Space issue on /flash partition Netscaler ADC 12.1 does not save the configuration. When clicked on the save icon in the browser, it prompts whether you want to save running configuration. Nothing happens when you click yes. From the putty session, when you run “save config” command, it outputs “ERROR:” and no error message is displayed on the putty console. Solution: Login to your netscaler through putty and check the free space of /flash directory.

AWS Definitions

Let’s look at some of the AWS definitions below. Some of the definitions are from AWS website directly. Availability Zones From AWS website: An Availability Zone (AZ) is one or more discrete data centers with redundant power, networking, and connectivity in an AWS Region. AZs give customers the ability to operate production applications and databases that are more highly available, fault tolerant, and scalable than would be possible from a single data center.

AWS Important points

Most of the AWS services are region specific. Services like IAM are available global. They are not related to any specific region. In AWS regional services page, you can check the services as per region. AWS Regional Services (amazon.com) AWS Role name can contain alphanumeric characters, or any of the following: _+=,.@- Even though admin permissions are given to a user, still he cant access billing dashboard. When creating instance if you create a tag called Name and give it a name, that name will be set as the instance name automatically.

A usable server cannot be found on which to launch the application

Issue When you click on a citrix application, ICA file downloads successfully. When clicking on the downloaded ICA file, it says: " A usable server cannot be found on which to launch the application. Application: APPNAME, Client XXX (address:XXXX), user:XXXX. Check your worker group definitions and load balancing policies to verify appropriate servers are assigned for the application name." Event id: 10001, Source: MetaFrameEvents, LogName: Application, Environment: <= xenapp 6.5 version