My router is a DLink 2730B. The target machine IP is 192.168.1.6. I’ve applied DMZ Host to this IP, and have configured on 'Virtual Server' the following settings:
Port 21 on 192.168.1.6 is ok, I can access 192.168.1.6:21 from LAN. But when I try to access it using the WAN IP, the browser returns:
This webpage is not available
Error code: ERR_CONNECTION_REFUSED
The external IP address is: 186.213.100.231, FTP port is on 2121, as you can see in my router configuration.
So you say that ports 8080, 8443 and 2121 cannot be reached from the outside world; meaning outside your network. And that you can reach ports 80, 443 and 21 from inside your network, correct?
Doing an nmap to the IP address you’ve provided of 186.213.100.231 shows none of the ports are open despite you setting them in the DMZ as you have described:
nmap 186.213.100.231 -p0,65535
Starting Nmap 6.25 ( http://nmap.org ) at 2014-11-12 17:37 EST
Strange error from connect (49):Can't assign requested address
Nmap scan report for 186.213.100.231.static.host.gvt.net.br (186.213.100.231)
Host is up (0.22s latency).
PORT STATE SERVICE
0/tcp filtered unknown
65535/tcp filtered unknown
Nmap done: 1 IP address (1 host up) scanned in 3.31 seconds
So perhaps there is another layer of firewall on the router? Or perhaps even on the larger WAN you are connected to? That’s my only guess at this point.
