Windows 7: How to configure portproxy on Windows 7?

Hi,

I am trying to get my Windows 7 machine to forward tcp connections to different address and port.

I searched through the internet and found that it can be done using "net sh interface portproxy" command. Specifically I am running the following from the command line:

netsh interface portproxy add v4tov4 8000 192.168.0.100 9000

(192.168.0.100 is the address of an other computer on my network which listens on tcp port 9000)



After that - I run

netsh interface portproxy

and get the following result:

Listen on ipv4: Connect to ipv4:

Address Port Address Port
--------------- ---------- --------------- ----------
* 8000 192.168.0.100 9000

Thus, everything should work but when I try to connect to the Windows 7 machine on TCP port 8000 I receive a Reset flag.

Any help will be appreciated,
Thanks

Hi.

This is not something I am experienced with, but since nobody else is responding, 2 heads bouncing ideas are better than 1.

Have you tried disabling Windows Firewall on both hosts just for process of elimination?

I also have been having problems with portproxy, but with ipv4<->IPv6.

It seems that even when I disable the firewall the connection is not allowed BUT after a reboot, with it disabled, it seems to take, then I can re-enable and all seems fine.

However after a couple of days when I try again to use the connection, I have to repeat the process for it to work.

I am looking into it but cant quite figure it out.

I have just noticed that after a couple of days of it working, I have just had to reset my machine and again it has stopped working. I am connecting remotely and don't want to reset again so I am trying to track down the problem just now.

My spidey IT sense thinks that it might be something like the dll that handles the portproxy (NETIOHLP.DLL I think), might be loaded someplace when the firewall change is made, and the reset causes it to be reloaded with the new config, thus curing the problem.

(i'm pretty sure what I just typed made no sense but I will continue cos the problem is driving me barmy.)

NETSH INTERFACE PORTPROXY do not work when doing port redirection between IPv4 and IPv4 addresses.

Probably not relevant to the OP, cos I think it refers to XP, and as Windows 7 has IPv6 installed as standard so..anyway.