I just switched from a Linksys to a Cisco 2610. When I configured DMZ on my Linksys, it took inbound packets and forwarded them, but it also took packets bound for my external address from the inside network and forwarded them as well.
I simply configured:
ip nat inside source static 192.168.1.3 65.41.113.X
to "DMZ" to 192.168.1.3. Works fine, for external connections. When I attempt to connect internally, the router accepts the connection. How can I tell the router to send these ports properly?