Terminal Server in port 80

I need to install terminal server in port 80, to connect to it from a
firewalled network that has all ports blocked except 80.
I've changed the terminal server listening port and redirected the 80 to my
server on the ADSL router.
It works perfectly connecting from dialing connection with modem and gprs,
but not connecting from another ADSL.
Do you know why?

Maybe some other program is listening on port 80, for
example IIS?

IIS6 has a special tool to change settings
(http://support.microsoft.com/default...b;EN-US;813368)
IIS5 uses an other setting (socketpooling???)

No, terminal server is listening in port 80 because I can connect to it from
local network and from dialing connection. Only fail from another ADSL.

"Marco A. Hernández" <(E-Mail Removed)> wrote in message
news:c8kilk$1hc$(E-Mail Removed)...
> No, terminal server is listening in port 80 because I can connect to it
from
> local network and from dialing connection. Only fail from another ADSL.

1. The "static NAT" performed by the ADSL Device may not be working as
expected...

Or

2. TS uses other ports in addition to what it "listens" on and those ports
are denied by the remote client's firewall. I'm not personally familiar
with the port usage of TS and how many secondary ports or "client ports" it
may use.

--

Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com