WRT54G NAT Issues

Discussion in 'Cisco/Linksys Wireless Routers' started by Admiral Ackbar, Sep 30, 2007.

  1. I posted this on the official Linksys thread but I've had no help there so far. MAybe someone here cna help me figure out what I'm doing wrong. So far I've had no luck.

  2. frenchy2k1

    frenchy2k1 LI Guru Member

    You seem to be confused by the terms used by your devices.

    NAT = network address translation. It means your device is NOT accessible directly from the internet (anybody cannot try to connect to it). This is good as a security feature, but bad when you are trying to share files in p2p or host games.

    As NAT is a compromise to use SEVERAL devices behind one public Internet IP address, you cannot have several devices with true OPEN NAT with only one IP address. The compromise is that you can redirect different ports for the same public IP to different private IPS (your devices). Imagine a bit an apartment complex, the IP is the street number and the ports are the apartment units.

    A protocol was created to simplify such gestion: UPNP. It allows the devices (or even computer programs) to automatically request ports being redirected to their device. So, the first step for your solution is to enable upnp in the router interface.

    After this, DHCP is the mechanism that gives IP to devices without one (static IP devices have one either way). If you disable it, your devices wont be able to get a valid IP on your network and hence wont work.

    Finally, it is possible that several of your programs conflict with each other. Several devices or programs may require the same ports. Int those cases, you will have to change the ports used if possible. If not possible, you may not be able to operate both devices fully behind the same NAT.

    As an additional advice, I would recommend you to switch from bitcomet to utorrent or azureus. Those programs include working upnp options that will facilitate your configuration.
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