Help with blocked ports

[Matt]

Hi,

I seem to have a number of blocked ports on my connection.

http://www.canyouseeme.org/ reports various blocked ports e.g. 443

I have disabled windows firewall, disabled the router firewall yet the ports are still blocked. My isp, pipex say they do not block ports.

So what could be doing it?

[Dav3y]

Using NAT on your router or have a firewall in there ?

[Matt]

The router suggests that it is a built in firewall.

I have also enabled DMZ but doesn't seem to effect anything either.

[Nivek]

did you install something like the nvidia onboard one that some motherboards support?

[Matt]

I cannot find anything else installed. The machine is a dell laptop. Everything standard install as far as I can tell.

[Dav3y]

So if you have DMZ enabled and point it to the IP of your laptop (192.168.x.x for example) does it work then ? If it does, i wouldn't recommend leaving it like this anyway, you're asking for trouble.

What is it you're trying to do exactly anyway ? And i know it's stating the obvious, but you do have something listening on port 443 or whatever port it is i take it ?

If you don't get a response by going to command prompt and doing a 'telnet localhost 443' for example, then you're wasting your time.

[Matt]

Yes I have that setting enabled, well did, and it made no difference.

I am just having trouble connecting to a number of servers. e.g. c&c3 or Betfair Poker

[WhiteKnight]

You want to find a section called "port forwarding" or "local servers" on your router.

Set up a port mapping for whatever port C&C needs to your local machine.

That said, i would have thought betfair wouldnt need incoming ports to be opened.

[Dav3y]

Hmm, well unless I'm missing something, there's four possible reasons for no connection.

1. ISP blocking it and telling you lies.
2. Firewall on router blocking it. (DMZ 'should' bypass this)
3. Firewall on PC blocking port.
4. No service running on the P.C. for the port you're looking at.

the telnet trick should work if the service is running on your P.C. . If it immediately responds to this saying 'Could not open connection to the host' , then this indicates number 4 is where the problem lies.

there used to be another popular firwall program a while back (zonealarm ? ). You haven't had that on there in the past have you ? I think if you had the firewall running on that when you uninstalled it, the firwall somehow remained working.

Out of ideas other than that, sorry.

[Matt]

Thanks for your help, sort of solved it.

As whiteknight suggested, adding the required ports seems to have worked.

Strange that the DMZ didn't work (and still doesn't)

Still probably safer to have it this way anyway.

Thanks for all your help