How to add local groups to an site without an existing feed: 

1.  You need to recompile INND (or run off inetd, or use inndstart -p etc)
    to run on the local host on a port other than
    119. The examples use port 120 as there is normally nothing else using
    that port. Create the groups you want on the local server in the
    regular fashion using inn (refer to inn documentation).

    Alternatively if you are multi-homed, you can force recent versions
    of inn to bind to a specific address. If you do this, make sure
    nntpcached is started *after* inn, or is also told to bind to a
    specific interface address or the two will clash.

2.  Add a line serving the local groups to the servers file

3.  Restart nntpcached. nntpcached should report something to syslog
    about fetching various files from the new server into the cache

4. Fini
