NAT troubles again

[Massimo]

I'm still having many, many troubles with Windows 2003's RRAS.

The situation so far...

- private network using subnet 192.168.42.0/255.255.255.0
- public IP addresses assigned by our ISP: X.Y.Z.66 through X.Y.Z.70, subnet
mask 255.255.255.248, gateway X.Y.Z.65.
- A Windows 2003 public web/mail server inside the LAN, with IP
192.168.42.20
- A Windows 2003 RRAS router, using NAT, with two NICs: 192.168.42.1 (the
private one) and X.Y.Z.67 (the public one)

My needs: forwarding HTTP, FTP, SMTP, POP3 and HTTPS incoming connection to
the web/mail server.

First of all, a little bug: the RRAS computer doesn't understand its own
port forwardings, if I try to access X.Y.Z.67:anyport from that machine
nothing happens.

Now, the problem: I finally managed to forward all of the traffic to the
web/mail server, but FTP doesn't work. The FTP server is working (it's
accessible inside the LAN), but when I try to access it from the Internet
the client hangs (be it Explorer or the command-line client) and after a
while says the connection was closed.
I forwarded port 21 of the public interface to port 21 of the FTP server.

Can someone help me finding what's wrong here ?

Thanks

Massimo

 

[Massimo]

I'm still having many, many troubles with Windows 2003's RRAS.

The situation so far...

- private network using subnet 192.168.42.0/255.255.255.0
- public IP addresses assigned by our ISP: X.Y.Z.66 through X.Y.Z.70, subnet
mask 255.255.255.248, gateway X.Y.Z.65.
- A Windows 2003 public web/mail server inside the LAN, with IP
192.168.42.20
- A Windows 2003 RRAS router, using NAT, with two NICs: 192.168.42.1 (the
private one) and X.Y.Z.67 (the public one)

My needs: forwarding HTTP, FTP, SMTP, POP3 and HTTPS incoming connection to
the web/mail server.

First of all, a little bug: the RRAS computer doesn't understand its own
port forwardings, if I try to access X.Y.Z.67:anyport from that machine
nothing happens.

Now, the problem: I finally managed to forward all of the traffic to the
web/mail server, but FTP doesn't work. The FTP server is working (it's
accessible inside the LAN), but when I try to access it from the Internet
the client hangs (be it Explorer or the command-line client) and after a
while says the connection was closed.
I forwarded port 21 of the public interface to port 21 of the FTP server.

Can someone help me finding what's wrong here ?

Update: I've been able to test the connection from outside the LAN, and when
accessing my FTP from the Internet it works. I.e., I can connect to
ftp://X.Y.Z.67 from outside my network, but not from the inside. Web
browsing, instead, works in both environements: http://X.Y.Z.67 is always
available.

I'm even more confused now...

Massimo