I have two LAN devices (192.168.1.18 and 192.168.1.19) that must appear to the outside world as a single public IP address (say 100.100.100.100). I got that part down, but the problem is that I also need inbound port specific mappings.
Inbound, I would need ports 25, 3389, 80, 443 to come inbound on 100.100.100.100.100 to 192.168.1.18. This is the part I'm having trouble with configuring.
Thank you in advance.
This is on a Cisco 1800 equivalent router.
You will need to add something like this:
ip nat inside source static tcp 192.168.1.18 XX interface FastEthernet0/0 XX
where "XX" is the TCP port in question and FE0/0 is the WAN inteface. Also, if you have an ACL applied to your WAN interface, you will have to allow that port in the inbound direction.
Hope this helps,