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I have a domain 'mydomain.com'. I have several web/mail/ftp servers in the cloud on different IPs from different cloud providers:
ftp.mydomain.com
mail.mydomain.com
www.mydomain.com
I also have a small home/office network with two computers. I would like them to be reachable over the internet:
home1.mydomain.com
home2.mydomain.com
I have added the public facing IP of my home router to the nameservers as an A record for both home1.mydomian.com and home2.mydomain.com.
What I would like now is to have the home router route incoming traffic to the correct machine but not using port forwarding. I want each machine to keep its own firewall, not just only accept traffic on one port.
Many thanks
NAT routers have a feature to put one computer into the DMZ. In NAT router terminology, that means that regardless of what port is accessed on the router public ip, the 'packet' is passed to that one computer. Suppose for a moment that the router had firmware that could pass that packet to all computers. Suppose 2 computers on your LAN run a service on port 1200. A computer outside wants to access one of them but cannot specify, and how would the router know which computer to forward to? – barlop – 2013-09-19T11:38:13.860
further from that comment, this question also mentions something about adding multiple computers to DMZ. Perhaps positive http://www.dslreports.com/forum/remark,847996 this one is more negative http://forums.techguy.org/networking/760700-dmz-3-computers.html
– barlop – 2013-09-19T11:43:10.127