Port Forwarding - WebSTAR DPC2100

[sharpium64]

Hello everybody,

I have a rare problem about forwarding ports. I can't access my modem's port options. In "192.168.100.1" 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

http://www.cisco.com/web/consumer/support/modem_DPC2100.html

I have succeded forwarding ports in my other Prolink ADSL (another ISP) by following the guides provided by portforward.com.

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:

WinXP SP2

Athlon 3800x2 2ghz

Asus M2V

2GB RAM

[DreadWingKnight]

Your cable modem isn't in residential gateway mode. Try to find something else along the way that could be interfering.

[sharpium64]

Thank you very much DreadWingKnight.

I check ports from http://www.canyouseeme.org/

Every ports I enter are blocked.

Btw, I disabled firewall and antivirus.

EDIT: I uninstalled firewall and antivirus.

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

But when I close uTorrent canyouseeme.org says the port is close.

Why is that?

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

Thanks

[Switeck]

"I disabled firewall and antivirus."

MOST 3rd party firewalls have to be completely uninstalled or they WILL BLOCK uTorrent.

Some can be configured not to, but disabling them won't work.

[sharpium64]

Thanks Switeck.

Ok I uninstalled both Firewall and Anti-virus, ran a registry cleaner, and rebooted.

But the results are still the same.

Thanks

[Switeck]

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

But when I close uTorrent canyouseeme.org says the port is close."

Sounds like Windows Firewall and UPnP at work.

[sharpium64]

"Sounds like Windows Firewall and UPnP at work."

What should I do with Windows Firewall and UPnP?

The Windows Firewall is stopped & disabled at Microsoft Services.

Thanks

[DreadWingKnight]

Switeck isn't paying attention actually.

If there's nothing running set to listen on a given port, it will ALWAYS appear closed when you test it.

Showing open while uTorrent is running and closed while it's not is logical.

[Switeck]

I AM paying attention, I was unaware of the probable behavior of the port.

I thought if it was forwarded, it would appear open even when uTorrent isn't running if Windows firewall is not interfering.

[DreadWingKnight]

Nope. It only shows open if there's an application listening.

[sharpium64]

"It only shows open if there's an application listening."

Thank you very much for explaining DreadWingKnight.

Now I know how port works. XD