access externally to OWA and ECP from public IP

%3CLINGO-SUB%20id%3D%22lingo-sub-2764059%22%20slang%3D%22en-US%22%3Eaccess%20externally%20to%20OWA%20and%20ECP%20from%20public%20IP%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-2764059%22%20slang%3D%22en-US%22%3E%3CP%3E%3CSPAN%3EAssuming%20my%20domain%20name%20is%20xyz-company.com%20and%20I%20have%20a%20public%26nbsp%3B%3C%2FSPAN%3E%3CA%20href%3D%22http%3A%2F%2Fwww.petenetlive.com%2FKB%2FArticle%2FTechTerms%23IP%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%22%3EIP%3C%2FA%3E%3CSPAN%3E%26nbsp%3Baddress%20of%20234.234.234.234%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSPAN%3Ewhy%20i%20can%20access%20externally%20to%20OWA%20and%20ECP%20from%20this%20public%20IP%20234.234.234.234%2Fecp%26nbsp%3B%20i%20need%20to%20block%20this%20public%20IP%20without%20effect%20that%20i%20can%20access%20with%20mail.domain.com%2Fecp%20from%20externally%3C%2FSPAN%3E%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-LABS%20id%3D%22lingo-labs-2764059%22%20slang%3D%22en-US%22%3E%3CLINGO-LABEL%3E2016%3C%2FLINGO-LABEL%3E%3CLINGO-LABEL%3EExchange%20Server%3C%2FLINGO-LABEL%3E%3CLINGO-LABEL%3EHybrid%3C%2FLINGO-LABEL%3E%3C%2FLINGO-LABS%3E
Occasional Contributor

Assuming my domain name is xyz-company.com and I have a public IP address of 234.234.234.234

 

why i can access externally to OWA and ECP from this public IP 234.234.234.234/ecp  i need to block this public IP without effect that i can access with mail.domain.com/ecp from externally

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