I am running out of things I know to check for this problem: I am running a web server on port 3000, before I go on any further, I'd like to mention that I have been able to access the server from remote computers, i.e., from another internet connection, I got my port forwarding for 3000 for this computer's ip, got the proper external ip, but since yesterday, I don't know what happened, it stopped working.
Now I have another computer that I host another server on 9999, it works fine. So that tells me that the port forwarding on the router IS working properly. Then I went to see if this other computer can see the web server on this problematic computer, and yes, it can. So I concluded that it is not a firewall issue on this problematic computer since it would have prevented networked computer to access the webserver.
I don't know if this is relevant, but I checked the hosts file in system32/drivers/etc, all lines are commented out. I haven't touched this anyway, but I thought I should mention it.
Is there something else that you can think of that I can try checking?
Win7 64bit Thank you!