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Are you able to adjust your SAPFQDN for a S/4 HANA CAL (trial) in AWS to customize your domain

We are running a CAL deployment of the S/4HANA DB in AWS, and our team is testing out a few FIORI apps. This is not running on our private VPC's attached to our private subnets we have in AWS. We'd rather not have to ask each BU tester to adjust their host file to resolve the "dummy.nodomain" domain, so we'd like to adjust the domain name that is being used, just not sure if this is advised on these trial boxes? Anyone done it successfully without breaking any functionality?

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  • Posted on Jun 01, 2018 at 08:59 AM

    Hello Christensen

    During instance creation of S/4HANA there is an option to start an Windows-based VM, which has the hosts file maintained accordingly to connect to S/4.

    Hence a user will not be required to maintain the dummy.nodomain domain name on their local machines.

    For S/4HANA 1709

    Please refer to section 2.4.5 of the Getting Started Guide of the S/4HANA solution.

    For S/4HANA 1610

    Please refer to section 3.2 of the Getting Started Guide of the S/4HANA solution.



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    • Thanks Vladimir, we did originally use that Windows VM server, however, the amount of users we have testing in parallel exceed what the VM can support.

      Any option of adjusting that "dummy.nodomain" default domain? I figure it would be a chance of /etc/hosts on the appliance and adjusting the SAPFQDN startup parameter for the SAP application, but not sure if this causes some issues on the S/4 Hana trial environment?

  • Posted on Jun 05, 2018 at 07:23 PM

    Hello Kyoshi,

    the domain is baked into the S/4HANA system, and we don't have a tested procedure for the CAL-hosted version at this time how to change it (with the on-premise Blu-Ray/download version, you can do it).

    If anyone in the community has tried it, maybe they can post their results here.

    One option could be to use a browser plugin to map the IP to dummy.nodomain (e.g. the Chrome vhost domain plugin) but not all apps may display correctly with this.

    Best, Joerg

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  • Posted on Sep 28, 2018 at 12:03 PM

    A little late, but I'm trying something similar.

    I have managed to change the hostname to, the DNS is resolving it without problem by editing PROFILE.PFL, instance profiles, /usr/sap/sapservices and /etc/hosts.

    It works until next restart, then SAP CAL system copies a new version of /etc/hosts without my names which prevents the message server to start.

    So after firing the instance up from CAL I need to logon via putty and add my hostname to /etc/hosts, (local AWS IP-address).

    Is there a way to either prevent CAL from update the /etc/hosts file? Or add my hostname to wahtever is sent to AWS from CAL?

    Regards Morten

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