Strange persistant blocking of open ports in Windows XP x64

J

JBT

I'm running an all up to date Windows XP Professional x64 Edition,
Version 2003 SP2
on an Asus Vintage V2-PE2 board with built-in NIC (VIA Rhine II Fast
Ethernet Adapter).

Not once in my life have I been unable to open a port
in ANY O.S. but this time it seems impossible to accomplish!
I'm at a loss here.

On the exact same LAN I have several machines, servers even, with no
problem
having some ports opened. The LAN is behind a Thomson SpeedTouch 780
WL,
in which I've opened up port 59622.

Firewall is off (service in XP isn't even running anymore). I have
also switched off
IPSEC and Windows Security Center. There's no virus-scanner actively
blocking anything,
there are NO processes I know about doing anything regarding access to
open ports.
The only thing left is Windows kernel core or some MS quirk I don't
know about.
This is pretty much a clean install of Windows XP x64 edition, except
for having
a lot of useless services switched off.

Please do not tell me how to open ports, because that is not the
problem.
Windows Firewall is not in use, I'm not running it, and I know how to
open ports
in the Win firewall (which I have already done just to be sure).
I have also switched UTP wires between different PC's, just to make
sure it wasn't
the cable (one can never be certain enough it isn't hardware-related)
or the modem.

My ISP isn't blocking ports. Open port 59623 on another machine works
just fine.
This other machine is running (good old reliable) Windows 2000.

When for example using http://www.canyouseeme.org/ to check if the
port is open,
it just keeps saying it's not open (for the particular PC running XP
x64),
and so does the software that needs the open port.

Can someone with MicroSoft expertise please tell me how to switch off
EVERY little damn security layer active in Windows XP x64 ?

Thanks.
 

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments. After that, you can post your question and our members will help you out.

Ask a Question

Top