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# Posted: 29 May 2009 00:34 - Edited by: sharpium64

Hello everybody,

I have a rare problem about forwarding ports. I can't access my modem's port options. In "" I olny see mac address, serial number etc. under "About Your Modem".

When I click the other tabs it says "This feature is not enabled"

This is my ipconfig info

My external ip is the same as the internal.
I don't have a router so I connect it directly to the modem via RJ45 ethernet.
My ISP uses a Cable modem - WebSTAR DPC2100 C2100.html

I have succeded forwarding ports in my other Prolink ADSL (another ISP) by following the guides provided by
But this cable modem and ISP is completely different and I don't have any idea how to do it.

Can you please guide me forwarding ports in this modem.

Thank you, Very much
I really appreciate your help.

PC Specs:
Athlon 3800x2 2ghz
Asus M2V

# Posted: 30 May 2009 03:48 - Edited by: sharpium64

Thank you very much Shnerdly.

I check ports from
Every ports I enter are blocked.

Btw, I disabled firewall and antivirus.

But the strange thing is whenever I start uTorrent and test the port that uTorrent is using, says it's open.
But when I close uTorrent says the port is close.

Why is that?

Should I run an application first before a port will be open?


# Posted: 1 Jun 2009 03:26

Almost all online port scanners show the same results when testing a port with no software listening to it. Like these sites:

It only shows open if there's an application listening to that specific port.

I'm just a little bit confused on how port works. I use uTorrent and the ports are working perfectly if it is running when I test it.

Thank you very much for explaining. Now I know how port works.

This community is very helpful. Wish you all the best.

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