FAQ: Firewall setting for Event-driven User Surveys (EDUS)

Where to find the issue

[Google/Android]: Firewall/Router configuration: CAUSE: 4000, error during web request, HTTP status 901 https://www.coronawarn.app/en/faq/#access-list

[Google/Android]: Firewall/Router Konfiguration: URSACHE: 4000, error during web request, HTTP status 901 https://www.coronawarn.app/de/faq/#access-list

Describe the issue

The domains listed in the Firewall advice (see links above) are:

• *.coronawarn.app
• *.t-online.de

The domain *.rki.de is not listed and it seems this is necessary for the Event-driven User Surveys (EDUS) according to the verbose logging I’m seeing in CWA Android 1.13.2 Logcat, which shows a configuration parameter surveyOnHighRiskUrl=https://befragungen.rki.de/CWABasisbefragung

The parameter is also to be seen in the server configuration file application.yaml.

Suggested change

Please check that access to https://befragungen.rki.de is necessary.

Add *.rki.de to the list of domains in

• https://www.coronawarn.app/en/faq/#access-list
• https://www.coronawarn.app/de/faq/#access-list

Also, test what happens if a firewall blocks access to this URL. If the error CAUSE: 4000, error during web request, HTTP status 901 is not the outcome, then it might be necessary to reword the document including the title.

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Internal Tracking ID: EXPOSUREAPP-1906

[dsarkar]

@MikeMcC399 @Ein-Tim Thanks! We will bring this to the developers for clarification. So, in short:

For the RKI survey routers should include in their domains access-list (apparently we shall not use the word whitelist):

• *.rki.de
• *.howsmyssl.com

?

[dsarkar]

Internal Tracking ID: EXPOSUREAPP-1906