Linuxdoc Linux Questions
Click here to ask our community of linux experts!
Custom Search
Next Previous Contents


First off, ensure that you have the version (or newer) as listed above in the previous section. Also be sure they are installed correctly.

  1. Install Napster on the Windows client PC's
  2. After installation and Napster user setup, this version of Napster will begin "Finding Acceptable Local Data Port", after a short time an error will occur. Note: If you have already installed napster v2.0 beta 5a, under the file menu select 'Properties.'
  3. At this point select the second option "I am not behind a firewall or I configured my firewall - Use TCP port:"
  4. Enter a unique number. Each computer that will be running Napster will need to use a different port. It may be easier to use the last number of the IP address. For example: if the computer's IP is, then 6702 would be easiest to remember. Note: make sure you don't pick ports for services that are running (i.e. 21, 110, etc...see /etc/services for a listing)
  5. Repeats steps 1 - 4 for all systems that will be using Napster.
  6. Now login to your IPMasq'd system and modify a startup file of your choice (I choose to use /etc/rc.d/rc.local)
    The following lines pass the connection to the Napster clients running on the hosts behind your IPMasq'd system.
    (add them to the startup file - you'll need to one command for each host using Napster)
    /usr/sbin/ipmasqadm portfw -a -P tcp -L 6702 -R 6702
    /usr/sbin/ipmasqadm portfw -a -P tcp -L 6703 -R 6703
    /usr/sbin/ipmasqadm portfw -a -P tcp -L 6704 -R 6704
    /usr/sbin/ipmasqadm portfw -a -P tcp -L 6705 -R 6705
    Note: XXX.XXX.XXX.XXX is the IP address of the Linux IPMasqing system (the Internet IP).
    Note: If you are having problems with IPMASQADM or IPMasquerading in general see the IPMASQ-HOWTO. This document is provided to help people who have their systems configured. The IPMASQ-HOWTO will get into a deeper discussion of port forwarding and IPMasq'd in general.

Next Previous Contents