I configure a number of forwarder ports on my home router for RDC
3389 -> Windows Vista desktop : 3389
3390 -> Windows Vista laptop : 3389
3391 -> Windows 2008 server : 3389
3392 -> Windows 2008 server : 3389
All was working fine until I swapped my laptop for another with Dell. After setting up the new laptop, I enabled Remote Desktop as usual, firewall disabled, but cannot connect to it from the outside Internet. I tried rebooting my router, changing the router port to 3388, to no avail. The other computers still connect fine. Nothing to do with Network level authentication either.
I can only RDC to the laptop from the LAN. Any ideas what may be the problem?