Changes between Version 1 and Version 2 of PortForwardingGuide

Jan 16, 2009, 4:59:58 PM (13 years ago)

removed the common issues section


  • PortForwardingGuide

    v1 v2  
    7070== Common Problems ==
    71 ==== UPnP/NAT-PMP ====
    72 For UPnP/NAT-PMP compatible routers, make sure:
    73  * UPnP/NAT-PMP is enabled. Consult your router's documentation for instructions. If your router doesn't support UPnP/NAT-PMP, you will have to forward manually.
    74  * DMZ mode is disabled.
    75  * The port has not already been forwarded manually.
    76 Note: NAT-PMP is only for Apple Airport routers.
    78 ==== Double NAT ====
    79 Another possible reason your port remains closed could be because your router is not the only device on the network which needs to be configured.
    81 For example, your network might resemble the following: ADSL modem/router --> Netgear Router --> Laptop.
    83 If you have multiple routers in your home network (such as in the example above), you have two options. The easiest way is to turn one of the routers into 'Bridge mode' which means you then only have to configure one device rather than all of them. So, in our above example, we would set the Netgear router to 'Bridge'. See your router's help documentation for instructions.
    85 The second way is to map Transmission's port on all of the devices on your network. Transmission can only automatically port map the router the computer is directly connected to. Any others in between this router and your modem will have to be forwarded manually. For detailed instructions, visit [].
    87 Finally make sure your firewall is either disabled, or you have allowed Transmission's port. The firewall can cause the port to remain closed, even if it has been successfully mapped by the router(s).
    89 ==== ISP Blocking Port ====
    90 Though initially this was done to "combat viruses and spam", it is sometimes used to keep out "bandwidth hogs". Normally the default (51413) port is fine. However, it might be that an ISP does decide to block that port. In such a case it is recommended to pick a random number between 49152 and 65535. If you can't find a port that's open (check with []), you have a different issue.
    92 ==== LAN ISP ====
    93 eg. Universities, Wifi hotspots, RV parks and some 'true' ISPs (common in Rome, Italy).
    95 Though these ISPs are often very interesting, offering high speeds, unlimited bandwidth (sometimes) and low prizes. This because they don't buy IP adresses for their clients and provide the (local) network themselves.
    97 Basically the only thing you can do, is to ''politely'' ask for them to open (forward) a port for you.
     71Go to the [PortClosed Why is my port closed?] page.
    101 == Comments ==
    102 >Waldorf: I want to move "Common Problems" to [wiki:"Why is my port closed?"]
    104 >Waldorf: I'm totally confused. I thing the "Unix" stuff needs serious review.
    106 >jah: shouldn't this page just read 'consult T's help file'? All the info here has either been directly copy/pasted from the help file, or slightly modified but not materially better. I see no reason to have duplication.
    107 >>theCrank: Well, maybe it's a good idea to let this Page evolve a bit and replace the help file?
    108 >>>jah: why? isn't one of the 'guidelines' on the wiki front page to avoid duplication? frankly, there isn't much (if anything) that could be added here on this topic.
    109 >>>>theCrank: In the help files there are no examples which help to identify the problem (like log snipplets, ...). We can use the wiki to describe the most common problems (and their symptoms?) more detailed and maybe stop some users in the forums to post the same questions over and over again.
    110 >>Waldorf: Let's look at it differently: This is, by far, the most asked question. And, apparently, most of the ppl screaming for help either didn't read the help or ''think'' they did, but didn't. So, if, because of this page here, ppl can resolve their issues (even if it's just forwarding to the build-in help), I think it's worth it.
     74>Waldorf: I'm still confused. I thing the "Unix" stuff needs some review.