losing my mind, all ports blocked/closed

Things change I've changed · 3 Oct 2011 at 15:05

Right I've been at this for hours,

os : W7
isp : BT
Router : BT Home Hub 2.0

According to every port checker/scanner on the net all my ports are closed/blocked which just doesn't make sense, even if I disable the firewall and put my ip into the dmz still according to online port checkers all my ports are blocked.

My torrent client works fine, my pop3 is fine, my ps3 is nat2 which is good so why does every port checker say my ports are blocked?

AshenShugar1873 · 3 Oct 2011 at 15:18

Ports will all be blocked for inbound traffic but some will be open for outbound traffic. Once the outbound traffic initiates a connection it will accept replies from the external computer/server. So your torrent works because your computer starts the connection then accepts responses. The port checkers turn up at your computer cold without an invite and report that they can't get in.

Things change I've changed · 3 Oct 2011 at 15:35

ok that makes sense, thanks for explaining, this port stuff really isn't easy to wrap your head around (for me anyway).

ecksmen · 3 Oct 2011 at 16:12

lowrider007 said:
ok that makes sense, thanks for explaining, this port stuff really isn't easy to wrap your head around (for me anyway).

You also need to remember that there needs to be something "listening" on the ports being specified.

You can forward all the ports to an IP but unless there's an application listening on that port you will not get a reply.

In CMD..

Code:

netstat -nao | find /i "listening"

That will show the listening ports and the PID so you can use task manager to identify which process is listening on what port...