More NAT problems

[hoinvip]

I have set-up a Win2k server as a Nat box but for some unknown reason it still doesn't work...

I have a win2k box with 2 nics. One to our adsl link and one to our internal network. I've configured RRAS manually and set-up NAT but for some reason I cannot determine it still won't work.

Our ISP has only allocated us one IP address which we've given to the internet facing NIC.... However, I need to connect a mail server on our private network via NAT....

Unfortunately I inherited this mess and now I'm trying to fix it.... :0(

Any help you can offer would be great.

Thanks in advance,

Peter

 

[peterve]

you will need port mapping for this...
use Wingate and set up port mapping on your mail server ports, and point them to the IP address on your private network ---------------------------------------------------------------------
I have not failed, I've just found 10,000 ways that don't work
---------------------------------------------------------------------
Peter Van Eeckhoutte
peter.ve@pandora.be
*:->* Did this post help? Click below to let me know !

 

[hoinvip]

Peter,

Thanks for the info... Am I right to assume that I run Wingate on the NAT router? I've never used this package before so are there any tips you could offer?

Many thanks,

Peter

 

[peterve]

yes, simply install Wingate on your NAT router,
don't enable the WIngate NAT,
disabled all port mapping services,

then create a TCP mapping service,
set it to listen on eg port 25 (for mail) and redirect the connections to a local IP address, on port 25
set it to listen on all interfaces and it will work... when you connect to the public IP address on port 25, Wingate will redirect the traffic to the internal IP address.. ---------------------------------------------------------------------
I have not failed, I've just found 10,000 ways that don't work
---------------------------------------------------------------------
Peter Van Eeckhoutte
peter.ve@pandora.be
*:->* Did this post help? Click below to let me know !

 

[jasonhand]

Another option is to take an old Pentium computer and put 2 nic cards in it and then go to this site and download the Smoothwall firewall and burn the image to a CD and install it. It works well and does NAT and web caching and VPN and is FREE. It was easy to set up and configure.

http://www.smoothwall.org

Take a look, I use it and it works well at blocking most attacks, even Nimda and Code Red. It has blocked those several times for us.

-Jason Hand

 

[hoinvip]

Peter,

Is there any way to test that the TCP port forwarding is working? I've set it up as per your instructions but I cannot see anything passing through.

(I am beginning to suspect that my exchange setup is wrong rather than this because the web access is working fine.)

Thanks,

Peter