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I just moved to Ubuntu on my MacBook and I spent the whole day trying to open port 51413 for Transmission.

What I've already done:

  1. I have ufw but I opened ports there and tried without it - probably not the problem:

     51413/tcp                  ALLOW       Anywhere
     51413/tcp                  ALLOW       Anywhere (v6)
    

    21/tcp ALLOW OUT Anywhere 80 ALLOW OUT Anywhere 143 ALLOW OUT Anywhere 2049 ALLOW OUT Anywhere 110 ALLOW OUT Anywhere 135,139,445/tcp ALLOW OUT Anywhere 137,138/udp ALLOW OUT Anywhere 25/tcp ALLOW OUT Anywhere 631 ALLOW OUT Anywhere 443/tcp ALLOW OUT Anywhere 53/udp ALLOW OUT Anywhere 123/udp ALLOW OUT Anywhere 993/tcp ALLOW OUT Anywhere 465/tcp ALLOW OUT Anywhere 51413/tcp ALLOW OUT Anywhere

  2. Router is Pirelli DRG A125G; tried disabling firewall, forwarding ports according to portforward.com but I have no experience with such thing so I don't know if I succeeded. On Transmission, it still shows the port is blocked and nothing is downloading.

  3. CanYouSeeMe.org: Tried to use it to see if ports are open but it shows that port is blocked

  4. Also tried qBittorrent, it also doesn't work.

user94159
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    You need to allow 51413 on udp too. More importantly what is your transmission configuration ?. You could try opening the wrong port. Also there is a port testing tool in transmission settings. No need to use an external one. If you allowed IGD/UPnP on your routeur, transmission should automatically take care of port fowarding, if you have enabled it. So again what is your transmission settings... – solsTiCe Jul 21 '15 at 14:28

1 Answers1

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It could very well be your ISP blocking it. Try a different port, and see if you can find any info on the web about your ISP restricting incoming traffic or BitTorrent traffic.

When troubleshooting ufw, you should just disable it temporarily to ensure it's not the problem.

nfirvine
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  • it seems that my isp is not blocking the port and i have also tried deluge with port range 6881:6891 no success, i have no idea where is my ports blocked... the other computer on network is imac and it works just fine with utorrent... – user94159 Oct 02 '12 at 23:12
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    It's probably port forwarding then. The iMac may work automatically by communicating with the router using UPnP to forward the port, but your Ubuntu machine might not being doing this correctly. Double-check your port forwarding. – nfirvine Oct 09 '12 at 16:53
  • I wasnt able to forward the ports but managed using DMZ host to disable it for my ip and it worked :) – user94159 Oct 10 '12 at 19:52
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    so now your PC is in DMZ... consider to return ufw to enable, default deny all, limit in 51413. If you have problem using ufw, gufw is its simple GUI. – feligiotti Oct 06 '14 at 21:25