'KeyCloak with Domainname

I have an server, running IIS and some c#-WebApis. I can call this services with http://domainname:port . Thats ok. On this server I have a Keycloak installed (IIS not involved) and I can access Keycloak via http://localhost:8080. But not over http://domainname:8080 . Whats the problem?



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