topic Re: NPrinting OnDemand: "Server access blocked by server"...how to fix? in Qlik NPrinting

NPrinting OnDemand: "Server access blocked by server"...how to fix?

robert_bond — Wed, 18 Mar 2020 13:25:32 GMT

We upgraded to Qlik Sense June 2019. We're using Nprinting June 2019.

Our Nprinting On-Demand returns this error message "Server access blocked by server"

Does anyone know how to fix this?

Re: NPrinting OnDemand: "Server access blocked by server"...how to fix?

Eva_B — Wed, 03 Jul 2019 19:14:22 GMT

Hello Robert,

I believe I am working your case in Support.

Just to make you aware I was able to duplicate the behavior and have created a Bug for R&D. Please see the below article I have created concerning the error message that includes the Bug ID:

https://support.qlik.com/articles/000078157

Regards,

Eva

Re: NPrinting OnDemand: "Server access blocked by server"...how to fix?

Eva_B — Wed, 03 Jul 2019 20:58:38 GMT

Hello Robert,

I may have found the cause of your issue.

I believe the upgrade cleared your selections. Please go to your QVF and "Edit" the sheet that has the buttons.

Then click on the On-Demand Reporting Button. Make sure there are drop downs selected for the App and the Connection.

I placed this information in the Case as well.

Regards,

Eva

Re: NPrinting OnDemand: "Server access blocked by server"...how to fix?

andrejfreitas — Thu, 04 Jul 2019 11:17:58 GMT

Hi Eva,

Thanks for your feedback. I found this solution you mentioned as well.

However, now I am not able to allow users with Analyzer licenses to generate reports On Demand.

I was following the steps in the April release: 1. Configuring the NPrinting with a Professional User, 2. Adjust the user Identity to an Analyzer user, 3. Release the dashboard (in April version that Analyzer user was able to generate the reports, but in the June version it looks like this functionality is disabled).

How can I allow users with Analyzer Licenses in Qlik sense to generate reports On Demand with NPrinting in the June version?

Thanks,

Andre

Re: NPrinting OnDemand: "Server access blocked by server"...how to fix?

Eva_B — Mon, 08 Jul 2019 20:45:49 GMT

Hello @andrejfreitas ,

You may want to start a new thread since the issue you are experiencing is a bit different from our scenario.

This way your post has a bit more visibility since your question is concerning the Analyzer Licenses with Qlik Sense and the On-Demand Reporting Extension.

Regards,

Eva

Re: NPrinting OnDemand: "Server access blocked by server"...how to fix?

andrejfreitas — Mon, 08 Jul 2019 18:53:36 GMT

Hi @Eva_B ,

Thanks. I already did, but no reply so far. However, the error I got is the same of this post "Server access blocked by server" after upgrading the Qlik sense release to June. (April was working fine). Would you be able to open an issue with it? Any ideas about how can we fix it?

Thanks,
Andre

Re: NPrinting OnDemand: "Server access blocked by server"...how to fix?

robert_bond — Tue, 09 Jul 2019 14:46:54 GMT

We think we have a workaround for this issue. There are two potential issues and solutions:

1. The permissions are not set correctly the Nprinting Security Role - Make sure users have privileges. You'll need to go to Nprinting->Admin->Security Roles. You'll need the right connection and sufficient privileges. We created a role just for Nprinting on demand

2. Qlik Sense doesn't prompt users for their Nprinting credentials - Our workaround is to embed a button entitled "Refresh Credentials". The button opens the Nprinting server URL which prompts the user for their Nprinting credentials.

Hope this helps,

Robert

Re: NPrinting OnDemand: "Server access blocked by server"...how to fix?

andrejfreitas — Mon, 08 Jul 2019 20:06:59 GMT

Hi @robert_bond ,

Many thanks for your feedback.

1 - The permissions are correct in the NPrinting Security Role. Quite sure of that, because it was working on Qlik Sense and NPrinting April version (and stopped working once we upgraded to June version)

2 - That might be a solution. How do you create this button to "Refresh Credentials" for NPrinting in Qlik sense?

Thanks,

Andre

Re: NPrinting OnDemand: "Server access blocked by server"...how to fix?

robert_bond — Mon, 08 Jul 2019 20:13:44 GMT

I used a simple text object with the text "Click here to refresh your credentials". I then hyperlinked the text.

Re: NPrinting OnDemand: "Server access blocked by server"...how to fix?

andrejfreitas — Mon, 08 Jul 2019 20:33:41 GMT

Thanks @robert_bond , I guess my question next would be which hyperlinked you are embedding.

Would it be the NPrinting services access: for instance, https://myQliksense.com:4993 or is there a way to prompt only the login's page embedded in the Qlik sense dashboard (as normally appears once you load the app, you have to login another time to generate the On Demand reports).

Thanks again,

Andre

Re: NPrinting OnDemand: "Server access blocked by server"...how to fix?

robert_bond — Tue, 09 Jul 2019 14:41:56 GMT

We're going with simple solution for now. Link to Nprinting 4993 page.

Re: NPrinting OnDemand: "Server access blocked by server"...how to fix?

andrejfreitas — Tue, 09 Jul 2019 19:58:07 GMT

Thanks, Robert, that was indeed the solution. When the client login on the NPrinting 4993, they are able to generate the reports.

Would you know why this was caused by since it just happened in the June version (April version was working fine)?

Thanks,

Andre

Re: NPrinting OnDemand: "Server access blocked by server"...how to fix?

robert_bond — Tue, 09 Jul 2019 20:26:31 GMT

No, I don't know the root cause. I only know the solution because I've spent way too much time on this project. 🙂

Re: NPrinting OnDemand: "Server access blocked by server"...how to fix?

andrejfreitas — Wed, 10 Jul 2019 11:52:58 GMT

Thanks, Robert, I appreciate that you shared your efforts on this. It sounds like a June 2019 version issue which the Qlik support team should be able to explain. @Eva_B any thoughts on that?

To sum up, Qlik sense June 2019 does not refresh the credentials once a user is changed under Identity (under connection) on the NPrinting service (mainly done when switching from a Professional user to an Analyzer user because Analyzer 's user can't configure the NPrinting On Demand button by itself). In fact, I tested to create the reports with the first user (Professional), and even though the connection is not configured to that user under Identity (after switching to an Analyzer's user), the first user (Professional) is still linked to the On Demand button, and therefore I was able to generate the reports with the first user (Professional license) but not with the second one (Analyzer) The solution was, in fact, to access the 4993 link with that second user (Analyzer's license) and "refresh" the connection

The solution was, in fact, to access the 4993 link with that second user (Analyzer's license) and "refresh" the connection.

Andre

Re: NPrinting OnDemand: "Server access blocked by server"...how to fix?

Eva_B — Wed, 10 Jul 2019 14:53:04 GMT

Hello @andrejfreitas :

Did you create a Support Case on the Support Portal for this issue?

It may be best to look at the Log Files / Dev Tools / etc.

Also are there any Group Policy settings that allow this in one browser but not the other? So in other words does Chrome / IE / Firefox all experience the same behavior?

Regards,

Eva

Re: NPrinting OnDemand: "Server access blocked by server"...how to fix?

andrejfreitas — Wed, 10 Jul 2019 15:17:41 GMT

Hi @Eva_B , thanks for your reply.

I believe that this should be linked to the support case you already created (https://support.qlik.com/articles/000078157?_ga=2.12411965.826796012.1562583511-1972379379.1557835902) because that's an error we are getting once we upgrade Qlik and NPrinting to June 2019. Otherwise, I am happy to create a separated support case.

I looked into the log files of NPrinting, I couldn't really find anything relevant there. (maybe I overlooked at it so I will double check)

This behavior happens to all browsers I tested (Chrome and Firefox)

Andre

Re: NPrinting OnDemand: "Server access blocked by server"...how to fix?

robert_bond — Wed, 10 Jul 2019 16:18:54 GMT

@andrejfreitas - What settings are you using for the security role? Here's what I think works.

Re: NPrinting OnDemand: "Server access blocked by server"...how to fix?

robert_bond — Wed, 10 Jul 2019 17:24:12 GMT

An update on our efforts:

1. Some users can run reports; others can't - We're seeing that some users can run the reports and others can't.

My hypothesis is that this is related to the firewall somehow.

@andrejfreitas - Any thoughts how your setup works or how to troubleshoot this?

Re: NPrinting OnDemand: "Server access blocked by server"...how to fix?

andrejfreitas — Wed, 10 Jul 2019 17:36:17 GMT

Hi @robert_bond , that is so great to have the opportunity to share knowledge with you because I have been finding these 'configurations' and 'workarounds' by myself in the past few months. Here's what I think is the minimum requirement to make this work. (you could probably uncheck some of your boxes). It would be good to have an "official" minimum security settings for Analyzer users by Qlik, but I am not sure if that's available somewhere online at this moment.

In addition to that, which role did you give to that user in the QMC? I can imagine you also don't want that user to be RootAdmin, but it looks like a user can't use the On Demand functionality if it does not have an admin role (which in my opinion should be changed by Qlik). The workaround I found was to create a customized "AuditAdmin" that does not give access to that Analyzer user to the QMC, but, on the other hand, has the full rights to generate reports On demand. What's your experience with this?

Many thanks. Again, it has been a pleasure to exchange these experiences with you. I think we could help each other in this process.

Andre

Re: NPrinting OnDemand: "Server access blocked by server"...how to fix?

robert_bond — Wed, 10 Jul 2019 17:42:21 GMT

Hi Andre -

I give users the minimum amount of privileges necessary. So, I created a special security role just for these users similar to what you did.

Robert