Author Archives: Johannes Norz

About Johannes Norz

Citrix consultant, evangelist, blogger and trainer, Austria

Selecting the correct language based on Accept-Language HTTP header using Citrix NetScaler responder policies

I recently was hired to create a web application firewall (WAF) using Citrix NetScaler to protect a SAP Hybris based e-shop. This shop has content for several languages, so we had to select the right home page. The base URL of the website was like that: https://shop.domain.com/shop/language/. SSL was optional…. Read more »

Redirecting a user to a SSL page (preserving the URL)

I’m just setting up a Web Application Firewall on a Citrix NetScaler 11.1 for a costumer’s shop. My costumer mandated: most of the website has to be available via HTTP. However we don’t want to expose sensitive information to the internet, so we had to create a policy redirecting users… Read more »

Trouble shooting Citrix NetScaler Gateway connection issues

One of the most annoying issues in Citrix NetScaler are ICA / HDX connection issues. The reason for this is the way connection issues are reported. There are two potential sources of trouble: Citrix StoreFront and Citrix NetScaer Gateway. So I will divide my blog in three sections: How to… Read more »

Doing Citrix NetScaler trace (nstrace) inside an admin-partition

I was so enthusiastic, when I found out about NetScaler admin partitions! What a great extension to existing NetScalers! However I got disillusioned finding out about limitations. It took me some time to find out how to overcome this issues, but there are still some features missing. The feature I… Read more »

Binding many NetScaler Gateways to a content switching vServer on Citrix NetScaler, Method 1

last update: November 14 /2017 Or: The power of the ANY service type This is a work around for a well-known problem in NetScaler: Binding NetScaler Gateways to content switching vServers. This solution does not follow Citrix best practices. Avoid using it, if you can! My solution will work with… Read more »

Splitting up a NetScaler site using admin partitions

(a nice but partly failed try) Complex web applications may lead to complex NetScaler configuration. And sometimes an administrator may get lost troubleshooting complex websites, especially sites using content switching. This is an example of a real world website: The portal page is assembled of several independent web applications. Each… Read more »

Changing my Citrix NetScaler VPX based website from http to https and scoring an A+ in SSL labs test

Last update: July 12 2018 This blog is about NetScaler versions up to 12. For 12.1 read here Citrix NetScaler load balancing and content switching servers will only score an C in quality labs SSL test, no matter if you use a VPX, MPX or SDX. There are several reasons for… Read more »

How to get a valide certificate for our NetScaler, if possible for free?

This is an updated blog entry. I first posted it on my old and discontinued blog at blog.com for Citrix NetScaler 10, this one is for Citrix NetScaler 11. We all know how to get a private Certificate for free: You just have to set up a Windows Server, add… Read more »

Front End Optimization (FEO) on Citrix NetScaler 11

Last update: July 7th 2018 (FEO testpage does not exist any more, but I updated the download link) I played round on my Citrix NetScaler with Front End Optimization (FEO) in NetScaler 11 built 63.16 (October 2015). There are several requirements. First of all, FEO is a feature depending on… Read more »

Preparing Citrix NetScaler 11 integrated Caching for Front End Optimization

Front End Optimization on a Citrix NetScaler will only work, if caching is set up correctly. This is especially true for image optimization. Usually it’s caching to blame for if image optimization does not work. So what to do? Citrix tells us (edocs.citrix.com): Front end optimization requires the NetScaler integrated… Read more »

Setting up StoreFront 3.0 for NetScaler 11

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As soon as our NetScaler Gateway is up and running we need to set up StoreFront to use it. It’s more a kind of introducing the NetScaler Gateway to StoreFront. Other than WebInterface StoreFront is designed to use a NetScaler Gateway, so it’s a rather easy thing to do. Enabling Pass-Through… Read more »

Making a NetScaler Gateway on NetScaler 11 a bit more secure

last update February 7th 2017 We have previously created a NetScaler Gateway on our NetScaler 11. That’s great! Time to check if it’s secure. I usually use SSL labs SSL test, a widely used tool to test the security of a website. I have an other blog about NetScaler virtual… Read more »

Setting up a NetScaler Gateway on NetScaler 11

It is quite easy to set up a NetScaler Gateway on NetScaler 11. It’s quite similar to NetScaler 10.5, but the wizard is much more powerful now! I’ll show you how to do it. Prerequisites I assume you have: a certificate in place. This certificate should be a valid certificate created… Read more »

Enabling ECDHE ciphers in NetScaler 10.5

last update: February 7th 2017 Similar but newer posts: Changing my Citrix NetScaler VPX based website from http to https and scoring an A+ in SSL labs test and Making a NetScaler Gateway on NetScaler 11 a bit more secure ECDHE Ciphers, this means, Elliptic curve Diffie–Hellman type of cyphers,… Read more »