Incoming connections are blocked

malco · 11-03-2004, 06:37 PM

Hi All

I'm looking at a friend's network which has a Speedtouch 510 gateway that acts as a NAT for about 10 workstations. All machines can access the internet and he wants to be able to access them (or at least the gateway PC) from the internet with Radmin (or Pcanywhere), but he can't!

I made sure that Windows 2000 which runs on the gateway PC, didn't have any TCP/IP filtering or its own firewall running. I setup an FTP server on this PC for a trial and told the firewall on the Speedtouch 510 to allow/send packets on ports 20 and 21. That didn't work so I just disabled the firewall completely for a few moments and then also tried other ports on the ftp server; this didn't help either!

What could possibly be blocking incoming connections?

PS: I'm looking at nmap to get to the heart of problem, but I don't really know how I should use it. Any ideas related to this would be appreciated.

11-03-2004, 06:37 PM	#1 (permalink)
malco Registered User Join Date: Nov 2004 Posts: 2 OS: Windows (all)	Incoming connections are blocked Hi All I'm looking at a friend's network which has a Speedtouch 510 gateway that acts as a NAT for about 10 workstations. All machines can access the internet and he wants to be able to access them (or at least the gateway PC) from the internet with Radmin (or Pcanywhere), but he can't! I made sure that Windows 2000 which runs on the gateway PC, didn't have any TCP/IP filtering or its own firewall running. I setup an FTP server on this PC for a trial and told the firewall on the Speedtouch 510 to allow/send packets on ports 20 and 21. That didn't work so I just disabled the firewall completely for a few moments and then also tried other ports on the ftp server; this didn't help either! What could possibly be blocking incoming connections? PS: I'm looking at nmap to get to the heart of problem, but I don't really know how I should use it. Any ideas related to this would be appreciated.