Can't seed torrents with cTorrent - Ports not open?

Hi,

I want to seed completed torrents. For some reason this isn’t possible. Downloading however IS possible, without problems.

What I think the problem is: the ports that enable cTorrent to seed (2106 - 2706) aren’t open. If I perform a portscan I get the following result:

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Open TCP Port: 21     ftp

Open TCP Port: 22     ssh

Open TCP Port: 80     http

Open TCP Port: 111     sunrpc

Open TCP Port: 139     netbios-ssn

Open TCP Port: 445     microsoft-ds

Open TCP Port: 548     afpovertcp

Open TCP Port: 1641   invision

Open TCP Port: 3689   daap

Open TCP Port: 9000   cslistener

Open TCP Port: 9010

Open TCP Port: 50220

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As you can see, the ports aren’t open. So I have the following two questions:

  1. Is it normal that you can’t seed torrents?

  2. How can I open ports, if it’s possible at all?

Thanks in advance (-: