Hello and thank you for your answer, idarek!
Till now, I’ve learned now a lot (uggh, ok: a bit…:-)) about DNS (https://strato.de/blog/domain-mapping-wordpress-multisite/ was helpful). I suggested, the plugin could handle different domain names, if I just direct two domains to the same directory.
That doesn’t work. I suggest, at least CNAME must be set, so the plugin can handle the different domain names. And I think, if I would have a static IP, I can also use the A-Record.
At first, I didn’t use the Strato-internal redirect, but set it to an external redirect by proxy and point to the domain of my WP-installation. That worked, the infinite redirection-error wasn’t triggered. I wanted to check again the internal redirection, and the infinite-redirection-error wasn’t triggered, too.
May be, I was a bit impatient.
So I set CNAME at least and now I’m waiting till the “The requested URL / was not found on this server.” message will disappear and all of the nameservers are updated. As Strato mention, that takes possibly up to 24 hours (or more, say other sources…) and I changed it just 20 hours ago.
But, as far, as I figured out, the problem of duplicate content comes up. So I think the Plugin might be usefull for same special needs. And for my needs on my wp-single-site I think I’m better served by using a 301-Redirection via .htaccess and the setting of the canonical link. That may brings up user-confusion cause the browser address-line doesn’t show the entered URL. Well, one death I have to die…
And, if I want to drive a website-farm as a business, domain-mapping plugins are needed, I think, when I want to let my clients have there own domain-name and not just a subdomain of my primary website. But then I need a fix IP-Adress to let the A-Record of the clients domain let point to it (at Strato, I can only change CNAME of subdomains, not of main domains). As far as I know, on Strato there’s no way by hosting-packages to get a static IP. You have to book a whole server.
Expensive for a single user with just an idea of giving WP-Blog-Ability to some friends for a bit more than less or just let my website be accessable under different domains without changing the address-line of the browser…
So, that’s my contribution for others, that may be struggling around with multi-site or single-site domain mapping. If something wrong for experts or there are progressive thoughts, please correct my suggestions or give your contribution.
Other users will be happy about that…
Forum-Admin or to whom ever this may concern: feel free to set this post into another category. Thank you, if applicable.
Regards,
Nikelaos