To cover future subdomain creation I want to install a wildcard ssl cert. Will this conflict with certificates I already use for existing subdomains?
Depends how you install the certificate.
Each VirtualHost in Apache/nginx is configured to serve a limited set of domains and will use the certificate it is told to use.
Are you using Certbot? Are you using
The certificate itself does not dictate its’ use.
That is done with the
server_alias directives in (nginx) vhost config server blocks.
serveralias in Apache)
You could search through your configs to better understand what you are already using.
grep -Eri 'server_name|server_alias' /etc/nginx
grep -Eri 'servername|serveralias' /etc/apache2
So is that a yes? If I have an INSTALLED certificate that works for subdomain.domain.com and I set up an additional wildcard *.domain.com certificate do I need to remove all confugration relating to any subdomain(s).domain.com?
No. You can, but you don’t have to.
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