NAT for public IPs

[Jose Hidalgo Herrera <jose () hostarica com>]

Hi, 
I'll like to know the advantages of having publicly available services
like http and ftp (that can have public IPs) behind NAT in a DMZ with
private IPs.

Example:

Common scenario:
internet -> firewalls -> [servers with public services using public ips]

NAT scenario:
internet -> firewalls -> NAT gateway -> [servers with public services
using private ips]

Sorry if this is a dummy question.

-- 
Jose Hidalgo Herrera <jose () hostarica com>
Corp. Hostarica

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